Xfem Requirements Traceability Matrix

This template follows INL template TEM-214, "IT System Requirements Traceability Matrix."

note

This document serves as an addendum to Framework Requirements Traceability Matrix and captures information for RTM specific to the Xfem application.

Introduction

Minimum System Requirements

In general, the following is required for MOOSE-based development:

GCC/Clang C++17 compliant compiler (GCC @ 7.5.0, Clang @ 5.0.2 or greater)
- Note: Intel compilers are not supported.
Memory: 16 GBs (debug builds)
Processor: 64-bit x86
Disk: 30GB

System Purpose

The MOOSE is a tool for solving complex coupled Multiphysics equations using the finite element method. MOOSE uses an object-oriented design to abstract data structure management, parallelism, threading and compiling while providing an easy to use interface targeted at engineers that may not have a lot of software development experience. MOOSE will require extreme scalability and flexibility when compared to other FEM frameworks. For instance, MOOSE needs the ability to run extremely complex material models, or even third-party applications within a parallel simulation without sacrificing parallelism. This capability is in contrast to what is often seen in commercial packages, where custom material models can limit the parallel scalability, forcing serial runs in the most severe cases. When comparing high-end capabilities, many MOOSE competitors target modest-sized clusters with just a few thousand processing cores. MOOSE, however, will be required to routinely executed on much larger clusters with scalability to clusters available in the top 500 systems (top500.org). MOOSE will also be targeted at smaller systems such as high-end laptop computers.

The design goal of MOOSE is to give developers ultimate control over their physical models and applications. Designing new models or solving completely new classes of problems will be accomplished by writing standard C++ source code within the framework's class hierarchy. Scientists and engineers will be free to implement completely new algorithms using pieces of the framework where possible, and extending the framework's capabilities where it makes sense to do so. Commercial applications do not have this capability, and instead opt for either a more rigid parameter system or a limited application-specific metalanguage.

System Scope

MOOSE's scope is to provide a set of interfaces for building FEM simulations. Abstractions to all underlying libraries are provided.

Solving coupled problems where competing physical phenomena impact one and other in a significant nonlinear fashion represents a serious challenge to several solution strategies. Small perturbations in strongly-coupled parameters often have very large adverse effects on convergence behavior. These adverse effects are compounded as additional physics are added to a model. To overcome these challenges, MOOSE employs three distinct yet compatible systems for solving these types of problems.

First, an advanced numerical technique called the JFNK method is employed to solve the most fully-coupled physics in an accurate, consistent way. An example of this would be the effect of temperature on the expansion or contraction of a material. While the JFNK numerical method is very effective at solving fully-coupled equations, it can also be computationally expensive. Plus, not all physical phenomena in a given model are truly coupled to one another. For instance, in a reactor, the speed of the coolant flow may not have any direct effect on the complex chemical reactions taking place inside the fuel rods. We call such models "loosely-coupled". A robust, scalable system must strike the proper balance between the various modeling strategies to avoid performing unnecessary computations or incorrectly predicting behavior in situations such as these.

MOOSE's Multiapp system will allow modelers to group physics into logical categories where MOOSE can solve some groups fully-coupled and others loosely-coupled. The Multiapp system goes even further by also supporting a "tightly-coupled" strategy, which falls somewhere between the "fully-coupled" and "loosely-coupled" approaches. Several sets of physics can then be linked together into logical hierarchies using any one of these coupling strategies, allowing for several potential solution strategies. For instance, a complex nuclear reactor model might consist of several tightly-coupled systems of fully-coupled equations.

Finally, MOOSE's Transfers system ties all of the physics groups contained within the Multiapp system together and allows for full control over the flow of information among the various groups. This capability bridges physical phenomena from several different complementary scales simultaneously. When these three MOOSE systems are combined, myriad coupling combinations are possible. In all cases, the MOOSE framework handles the parallel communication, input, output and execution of the underlying simulation. By handling these computer science tasks, the MOOSE framework keeps modelers focused on doing research.

MOOSE innovates by building advanced simulation capabilities on top of the very best available software technologies in a way that makes them widely accessible for innovative research. MOOSE is equally capable of solving small models on common laptops and the very biggest FEM models ever attempted—all without any major changes to configuration or source code. Since its inception, the MOOSE project has focused on both developer and computational efficiency. Improved developer efficiency is achieved by leveraging existing algorithms and technologies from several leading open-source packages. Additionally, MOOSE uses several complementary parallel technologies (both the distributed-memory message passing paradigm and shared-memory thread-based approaches are used) to lay an efficient computational foundation for development. Using existing open technologies in this manner helps the developers reduce the scope of the project and keeps the size of the MOOSE code base maintainable. This approach provides users with state-of-the-art finite element and solver technology as a basis for the advanced coupling and solution strategies mentioned previously.

MOOSE's developers work openly with other package developers to make sure that cutting-edge technologies are available through MOOSE, providing researchers with competitive research opportunities. MOOSE maintains a set of objects that hide parallel interfaces while exposing advanced spatial and temporal coupling algorithms in the framework. This accessible approach places developmental technology into the hands of scientists and engineers, which can speed the pace of scientific discovery.

Assumptions and Dependencies

The Xfem application is developed using MOOSE and is based on various modules, as such the RTM for Xfem is dependent upon the files listed at the beginning of this document.

Pre-test Instructions/Environment/Setup

Ideally all testing should be performed on a clean test machine following one of the supported configurations setup by the test system engineer. Testing may be performed on local workstations and cluster systems containing supported operating systems.

The repository should be clean prior to building and testing. When using "git" this can be done by doing a force clean in the main repository and each one of the submodules:


git clean -xfd
git submodule foreach 'git clean -xfd'

All tests must pass in accordance with the type of test being performed. This list can be found in the Software Test Plan.

System Requirements Traceability

Functional Requirements

xfem: Bimaterials
9.1.1The XFEM module shall have the capability to calculate mechanical response in two glued, layered materials with the interface location and material properties applied to on each side of the boundary determined by a level set function.
Specification(s): glued_bimaterial
Design: LevelSetCutUserObject XFEMSingleVariableConstraint
Issue(s): #10421
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.1.2The XFEM module shall have the capability to calculate mechanical response in a composite material matrix with an inclusion with the location of the inclusion boundary and material properties applied to the matrix and inclusion determined by a prescribed level set function.
Specification(s): inclusion_bimaterial
Design: LevelSetCutUserObject XFEMSingleVariableConstraint
Issue(s): #10421
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.1.3The system shall have the capability to calculate the mechanical response in two glued, layered materials with the interface location and automatic differentiation material properties applied to on each side of the boundary determined by a level set function.
Specification(s): glued_ad_bimaterial
Design: LevelSetBiMaterialRankTwo LevelSetBiMaterialRankFour
Issue(s): #15437
Collection(s): FUNCTIONAL
Type(s): Exodiff
Prerequisite(s): 9.1.1
29
9.1.4The XFEM module shall have the capability to calculate mechanical response in a composite material matrix with an inclusion with the location of the inclusion boundary and material properties applied to the matrix and inclusion determined by a prescribed level set function using automatic differentiation.
Specification(s): inclusion_ad_bimaterial
Design: LevelSetBiMaterialRankTwo
Issue(s): #15437
Collection(s): FUNCTIONAL
Type(s): Exodiff
Prerequisite(s): 9.1.2
29

xfem: Checkpoint
9.2.1The XFEM module shall support outputting of checkpoint files.
Specification(s): checkpoint
Design: Checkpoint
Issue(s): #17063
Collection(s): FUNCTIONAL
Type(s): CheckFiles
29

xfem: Corner Nodes Cut
9.3.1The XFEM module shall have the capability of cutting directly through multiple nodes of a single QUAD4 element in 2D.
Specification(s): corner_node_cut_twice
Design: LineSegmentCutUserObject
Issue(s): #6320
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.3.2The XFEM module shall be able to perform mesh cuts on any combination of the edges of elements and through elements including allowing cuts that go through the nodes on the same mesh.
Specification(s): corner_edge_cut
Design: LineSegmentCutUserObject
Issue(s): #6320
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.3.3The XFEM module shall have the capability of perfoming mesh cuts on the edges of elements such that only two new nodes are generated to separate the previously connected elements.
Specification(s): corner_node_cut
Design: LineSegmentCutUserObject
Issue(s): #6320
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.3.4The XFEM module shall be capable of propagating an existing crack front along a prescribed cut in 2D.
Specification(s): notch
Design: LineSegmentCutUserObject
Issue(s): #6320
Collection(s): FUNCTIONAL
Type(s): Exodiff
29

xfem: Crack Tip Enrichment
9.4.1The XFEM module shall have the capability to include near-tip enrichment functions in 2D mechanics simulations.
Specification(s): crack_tip_enrichment_edge_2d
Design: LineSegmentCutUserObject CrackTipEnrichmentStressDivergenceTensors
Issue(s): #10042
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.4.2The XFEM module shall have the capability to include near-tip enrichment functions in 3D mechanics simulations.
Specification(s): crack_tip_enrichment_penny_crack_3d
Design: CircleCutUserObject CrackTipEnrichmentStressDivergenceTensors
Issue(s): #10042
Collection(s): FUNCTIONAL
Type(s): Exodiff
1

xfem: Diffusion Xfem
9.5.1The XFEM Module shall have the capability to run 2D diffusion problems with prescribed values on the domain boundary (Dirichlet conditions) with a fixed position discontinuous interface through mesh elements.
Specification(s): diffusion_xfem
Design: LineSegmentCutUserObject
Issue(s): #6320
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.5.2The XFEM Module shall have the capability to run 2D diffusion problems with prescribed solution values on the domain boundary (Dirichlet conditions) and prescribed boundary flux values (Neumann conditions) with a fixed position discontinuous interface defined by a geometric cut user object.
Specification(s): diffusion_xfem_flux_bc
Design: LineSegmentCutUserObject
Issue(s): #6320
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.5.3The XFEM Module shall have the capability to run 2D diffusion problems with a fixed position discontinuous interface defined by the location of the zero values of a level set function with the level set variable being a Moose Variable.
Specification(s): levelsetcut2d
Design: LevelSetCutUserObject
Issue(s): #6320
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.5.4The XFEM Module shall have the capability to run 2D diffusion problems with a fixed position discontinuous interface defined by the location of the zero values of a prescribed level set function with the level set variable being a Moose AuxVariable.
Specification(s): levelsetcut2d_aux
Design: LevelSetCutUserObject
Issue(s): #6320
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.5.5The XFEM Module shall have the capability to run 3D diffusion problems with a fixed position discontinuous interface defined by the location of the zero values of a prescribed level set function with the level set variable being a Moose AuxVariable.
Specification(s): levelsetcut3d
Design: LevelSetCutUserObject
Issue(s): #6320
Collection(s): FUNCTIONAL
Type(s): Exodiff
29

xfem: Init Solution Propagation
9.6.1The XFEM module shall retain the values of auxiliary variables on child nodes and elements after running the cutting algorithm, and initialize solution variables on newly created nodes with values from parent nodes in parallel
Specification(s): init_solution_propagation
Design: XFEM
Issue(s): #8763
Collection(s): FUNCTIONAL
Type(s): Exodiff
29

xfem: Mechanical Constraint
9.7.1The XFEM module shall permit applying a glued constraint across the XFEM interface for 2D solid mechanics problems.
Specification(s): glued_penalty
Design: XFEM
Issue(s): #6320
Collection(s): FUNCTIONAL
Type(s): Exodiff
64

xfem: Moment Fitting
9.8.1The XFEM module shall permit the use of the moment fitting algorithm to compute integration point weights for partial elements on 2D solid mechanics problems
Specification(s): solid_mechanics_moment_fitting
Design: XFEM
Issue(s): #6320
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.8.2The XFEM module shall permit the use of the moment fitting algorithm to compute integration point weights for partial elements on 2D problems with a 4-point integration rule
Specification(s): diffusion_moment_fitting_four_points
Design: XFEM
Issue(s): #6320
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.8.3The XFEM module shall permit the use of the moment fitting algorithm to compute integration point weights for partial elements on 2D problems with a 6-point integration rule
Specification(s): diffusion_moment_fitting_six_points
Design: XFEM
Issue(s): #6320
Collection(s): FUNCTIONAL
Type(s): Exodiff
29

xfem: Moving Interface
9.9.1The XFEM module shall provide an ability to specify whether an XFEM cut surface should be healed independently for individual interfaces
Specification(s): moving_interface
Design: LineSegmentCutSetUserObject LevelSetCutUserObject
Issue(s): #11259
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.9.2The XFEM module shall not output summary information on mesh changes when debug_output_level=0
Specification(s): moving_interface_debug_output_0
Design: XFEM
Issue(s): #13666
Collection(s): FUNCTIONAL
Type(s): RunApp
Prerequisite(s): 9.9.1
29
9.9.3The XFEM module shall output summary information on mesh changes when debug_output_level=1
Specification(s): moving_interface_debug_output_1
Design: XFEM
Issue(s): #13666
Collection(s): FUNCTIONAL
Type(s): RunApp
Prerequisite(s): 9.9.2
29
9.9.4The XFEM module shall output detailed information on mesh changes when debug_output_level=2
Specification(s): moving_interface_debug_output_2
Design: XFEM
Issue(s): #13666
Collection(s): FUNCTIONAL
Type(s): RunApp
Prerequisite(s): 9.9.3
29
9.9.5The XFEM module shall output detailed information on mesh changes when debug_output_level=3
Specification(s): moving_interface_debug_output_3
Design: XFEM
Issue(s): #13666
Collection(s): FUNCTIONAL
Type(s): RunApp
Prerequisite(s): 9.9.4
29
9.9.6The XFEM module shall provide an ability to solve bi-material mechanics problems where a moving material interface is defined by an XFEM surface, which is defined by a prescribed level set field.
Specification(s): moving_bimaterials
Design: LevelSetBiMaterialRankTwo LevelSetBiMaterialRankFour XFEMSingleVariableConstraint
Issue(s): #11259 #15096
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.9.7The XFEM module shall provide an ability to solve bi-material mechanics problems where a moving material interface is defined by an XFEM surface, which is defined by a prescribed level set field, while using the automatic differentiation capability.
Specification(s): moving_ad_bimaterials
Design: LevelSetBiMaterialRankTwo LevelSetBiMaterialRankFour
Issue(s): #15437
Collection(s): FUNCTIONAL
Type(s): Exodiff
Prerequisite(s): 9.9.6
29
9.9.8The XFEM module shall provide an ability to solve bi-material mechanics problems at finite strain where a moving material interface is defined by an XFEM surface, which is defined by a prescribed level set field.
Specification(s): moving_bimaterial_finite_strain
Design: LevelSetBiMaterialRankTwo LevelSetBiMaterialRankFour XFEMSingleVariableConstraint
Issue(s): #15817
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.9.9The XFEM module shall provide an ability to modify subdomain IDs based on an XFEM interface.
Specification(s): moving_bimaterial_finite_strain_esm
Design: CutElementSubdomainModifier
Issue(s): #15817
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.9.10The XFEM module shall provide an ability to solve bi-material diffusion problems where a moving material interface is defined by an XFEM surface, which is defined by a prescribed level set field.
Specification(s): moving_diffusion
Design: LevelSetBiMaterialReal XFEMEqualValueAtInterface LevelSetCutUserObject
Issue(s): #11749
Collection(s): FUNCTIONAL
Type(s): Exodiff
5
9.9.11The XFEM module shall provide an ability to solve bi-material diffusion problems where a moving material interface is defined by an XFEM surface, which is defined by a prescribed level set field, while using automatic differentiation.
Specification(s): moving_ad_diffusion
Design: LevelSetBiMaterialReal
Issue(s): #15437
Collection(s): FUNCTIONAL
Type(s): Exodiff
Prerequisite(s): 9.9.10
5
9.9.12The XFEM module shall provide an ability to solve a simple 2d phase transition problem in which the phase boundary is defined by and XFEM surface and the interface velocity depends on the jump of variables and gradients across the interface.
Specification(s): phase_transition_2d
Design: LevelSetBiMaterialReal XFEMEqualValueAtInterface MeshCutLevelSetAux XFEMPhaseTransitionMovingInterfaceVelocity NodeValueAtXFEMInterface InterfaceMeshCut2DUserObject
Issue(s): #11749 #17797
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.9.13The XFEM module shall provide an ability to solve a simple 3d phase transition problem in which the phase boundary is defined by and XFEM surface and the interface velocity depends on the jump of variables and gradients across the interface.
Specification(s): phase_transition_3d
Design: LevelSetBiMaterialReal XFEMEqualValueAtInterface MeshCutLevelSetAux XFEMPhaseTransitionMovingInterfaceVelocity NodeValueAtXFEMInterface InterfaceMeshCut3DUserObject
Issue(s): #11749 #17797
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.9.14The XFEM module shall provide an ability to solve a 2d simple phase transition problem in which the phase boundary is defined by and XFEM surface and the interface velocity depends on the jump of variables and gradients across the interface using the automatic differentiation capability.
Specification(s): ad_phase_transition_2d
Design: LevelSetBiMaterialReal
Issue(s): #15437
Collection(s): FUNCTIONAL
Type(s): Exodiff
Prerequisite(s): 9.9.12
29
9.9.15The XFEM module shall provide an ability to cut one block with a moving circle surface mesh in 2D.
Specification(s): cut_mesh_2d
Design: InterfaceMeshCut2DUserObject
Issue(s): #17797
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.9.16The XFEM module shall provide an ability to cut one block with a moving cylinder surface mesh in 3D.
Specification(s): cut_mesh_3d
Design: InterfaceMeshCut3DUserObject
Issue(s): #17797
Collection(s): FUNCTIONAL
Type(s): Exodiff
5
9.9.17The XFEM module shall accurately solve 1D, xy problems with homogeneous material properties with a moving interface determined by a user prescribed level set function, and problem results are verified using the Method of Manufactured Solutions.
Specification(s): 1D_xy_homog1mat
Design: LevelSetCutUserObject
Issue(s): #12833
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.9.18The XFEM module shall accurately solve 1D, xy problems with material properties and a moving interface dependent on a user prescribed level set function, and problem results are verified using the Method of Manufactured Solutions.
Specification(s): 1D_xy_lsdep1mat
Design: LevelSetCutUserObject
Issue(s): #12833
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.9.19The XFEM module shall accurately solve 1D, xy problems with a moving interface separating two discrete materials prescribed by a user defined level set function with problem results verified using the Method of Manufactured Solutions.
Specification(s): 1D_xy_discrete2mat
Design: LevelSetCutUserObject XFEMSingleVariableConstraint
Issue(s): #13756
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.9.20The XFEM module shall accurately solve 1D, rz problems with homogeneous material properties with a moving interface determined by a user prescribed level set function, and problem results are verified using the Method of Manufactured Solutions.
Specification(s): 1D_rz_homog1mat
Design: LevelSetCutUserObject
Issue(s): #12833
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.9.21The XFEM module shall accurately solve 1D, rz problems with material properties and a moving interface dependent on a user prescribed level set function, and problem results are verified using the Method of Manufactured Solutions.
Specification(s): 1D_rz_lsdep1mat
Design: LevelSetCutUserObject
Issue(s): #12833
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.9.22The XFEM module shall accurately solve 2D, xy problems with homogeneous material properties with a moving interface determined by a user prescribed level set function, and problem results are verified using the Method of Manufactured Solutions.
Specification(s): 2D_xy_homog1mat
Design: LevelSetCutUserObject
Issue(s): #12833
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.9.23The XFEM module shall accurately solve 2D, xy problems with material properties and a moving interface dependent on a user prescribed level set function, and problem results are verified using the Method of Manufactured Solutions.
Specification(s): 2D_xy_lsdep1mat
Design: LevelSetCutUserObject
Issue(s): #12833
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.9.24The XFEM module shall accurately solve 2D, rz problems with homogeneous material properties with a moving interface determined by a user prescribed level set function, and problem results are verified using the Method of Manufactured Solutions.
Specification(s): 2D_rz_homog1mat
Design: LevelSetCutUserObject
Issue(s): #12833
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.9.25The XFEM module shall accurately solve 2D, rz problems with material properties and a moving interface dependent on a user prescribed level set function, and problem results are verified using the Method of Manufactured Solutions.
Specification(s): 2D_rz_lsdep1mat
Design: LevelSetCutUserObject
Issue(s): #12833
Collection(s): FUNCTIONAL
Type(s): Exodiff
29

xfem: Pressure Bc
9.10.1The XFEM module shall permit application of pressure boundary conditions to XFEM cut surfaces in 2D
Specification(s): edge_2d_pressure
Design: XFEMPressure
Issue(s): #6320
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.10.2The XFEM module shall permit application of pressure boundary conditions to XFEM cut surfaces in 3D
Specification(s): edge_3d_pressure
Design: XFEMPressure
Issue(s): #6320
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.10.3The XFEM module shall permit application of pressure boundary conditions to inclined XFEM cut surfaces in 2D
Specification(s): inclined_edge_2d_pressure
Design: XFEMPressure
Issue(s): #6320
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.10.4The XFEM module shall permit application of pressure boundary conditions to XFEM cut surfaces in 2D finite deformation simulations
Specification(s): 2d_pressure_displaced_mesh
Design: XFEMPressure
Issue(s): #6320
Collection(s): FUNCTIONAL
Type(s): Exodiff
29

xfem: Second Order Elements
9.11.1The XFEM module shall permit modeling of discontinuities represented with XFEM with second-order elements in 2D using TRI6 elements.
Specification(s): diffusion_2d_tri6
Design: XFEM
Issue(s): #8709
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.11.2The XFEM module shall permit modeling of discontinuities represented with XFEM with second-order elements in 2D using QUAD8 elements.
Specification(s): diffusion_2d_quad8
Design: XFEM
Issue(s): #8709
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.11.3The XFEM module shall permit modeling of discontinuities represented with XFEM with second-order elements in 2D using QUAD9 elements.
Specification(s): diffusion_2d_quad9
Design: XFEM
Issue(s): #8709
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.11.4The XFEM module shall permit modeling of discontinuities represented with XFEM with second-order elements in 2D using QUAD9 elements when the XFEM cutting plane is prescribed using a level set field.
Specification(s): diffusion_quad9_levelsetcut
Design: XFEM
Issue(s): #8709
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.11.5The XFEM module shall permit modeling of discontinuities represented with XFEM with second-order elements in 3D using TET10 elements when the XFEM cutting plane is prescribed using a level set field.
Specification(s): diffusion_3d_tet10
Design: XFEM
Issue(s): #8709
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.11.6The XFEM module shall permit modeling of discontinuities represented with XFEM with second-order elements in 3D using HEX20 elements when the XFEM cutting plane is prescribed using a level set field.
Specification(s): diffusion_3d_hex20
Design: XFEM
Issue(s): #8709
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.11.7The XFEM module shall permit modeling of discontinuities represented with XFEM with second-order elements in 3D using HEX27 elements when the XFEM cutting plane is prescribed using a level set field.
Specification(s): diffusion_3d_hex27
Design: XFEM
Issue(s): #8709
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.11.8The XFEM module shall permit modeling of branching of discontinuities represented with XFEM by sequentially cutting second-order elements in 2D using QUAD8 elements.
Specification(s): square_branch_quad8_2d
Design: XFEM
Issue(s): #8709
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.11.9The XFEM module shall permit modeling of branching of discontinuities represented with XFEM by sequentially cutting second-order elements in 2D using QUAD9 elements.
Specification(s): square_branch_quad9_2d
Design: XFEM
Issue(s): #8709
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.11.10The XFEM module shall permit modeling of branching of discontinuities represented with XFEM by sequentially cutting second-order elements in 2D using TRI6 elements.
Specification(s): square_branch_tri6_2d
Design: XFEM
Issue(s): #8709
Collection(s): FUNCTIONAL
Type(s): Exodiff
29

xfem: Side Integral
9.12.1The XFEM module shall properly integrate quantities on sides of cut elements that are intersected by the cutting plane in 2D
Specification(s): side_integral_xfem
Design: XFEM
Issue(s): #6320
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.12.2The XFEM module shall properly integrate quantities on sides of cut elements that are intersected by the cutting plane in 3D
Specification(s): side_integral_3d_xfem
Design: XFEM
Issue(s): #6320
Collection(s): FUNCTIONAL
Type(s): Exodiff
29

xfem: Single Var Constraint 2D
9.13.1The XFEM module shall provide an ability to apply a zero-jump, zero-flux-jump constraint across a propagating XFEM interface for one variable.
Specification(s): propagating_1field
Design: XFEMSingleVariableConstraint
Issue(s): #6572
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.13.2The XFEM module shall provide an ability to apply a zero-jump, zero-flux-jump constraint across a propagating XFEM interface for one variable in a problem with another variable that does not have a constraint across that interface.
Specification(s): propagating_2field_1constraint
Design: XFEMSingleVariableConstraint
Issue(s): #6572
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.13.3The XFEM module shall provide an ability to apply zero-jump, zero-flux-jump constraints across a propagating XFEM interface for two variables.
Specification(s): propagating_2field_2constraint
Design: XFEMSingleVariableConstraint
Issue(s): #6572
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.13.4The XFEM module shall provide an ability to apply a zero-jump, zero-flux-jump constraint on a stationary interface for one variable.
Specification(s): stationary_equal
Design: XFEMSingleVariableConstraint
Issue(s): #6572
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.13.5The XFEM module shall provide an ability to apply a zero-jump, nonzero-flux-jump (defined by a Real value) constraint on a stationary interface for one variable.
Specification(s): stationary_fluxjump
Design: XFEMSingleVariableConstraint
Issue(s): #6572
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.13.6The XFEM module shall provide an ability to apply a zero-jump, nonzero-flux-jump (defined by a function) constraint on a stationary interface for one variable.
Specification(s): stationary_fluxjump_func
Design: XFEMSingleVariableConstraint
Issue(s): #13756
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.13.7The XFEM module shall provide an ability to apply a nonzero-jump (defined by a Real value), zero-flux-jump constraint on a stationary interface for one variable.
Specification(s): stationary_jump
Design: XFEMSingleVariableConstraint
Issue(s): #6572
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.13.8The XFEM module shall provide an ability to apply a nonzero-jump (defined by a function), zero-flux-jump constraint on a stationary interface for one variable.
Specification(s): stationary_jump_func
Design: XFEMSingleVariableConstraint
Issue(s): #13756
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.13.9The XFEM module shall provide an ability to apply a nonzero-jump, nonzero-flux-jump constraint on a stationary interface for one variable.
Specification(s): stationary_jump_fluxjump
Design: XFEMSingleVariableConstraint
Issue(s): #6572
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.13.10The XFEM module shall provide an ability to apply a two-sided equal value constraint on a stationary interface for one variable.
Specification(s): equal_value
Design: XFEMEqualValueAtInterface
Issue(s): #11750
Collection(s): FUNCTIONAL
Type(s): Exodiff
29

xfem: Single Var Constraint 3D
9.14.1The XFEM module shall provide an ability to apply a zero-jump, zero-flux-jump constraint across a stationary XFEM interface for one variable in 3D.
Specification(s): stationary_equal_3d
Design: XFEMSingleVariableConstraint
Issue(s): #6572
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.14.2The XFEM module shall provide an ability to apply a zero-jump, nonzero-flux-jump constraint across a stationary XFEM interface for one variable in 3D.
Specification(s): stationary_fluxjump_3d
Design: XFEMSingleVariableConstraint
Issue(s): #6572
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.14.3The XFEM module shall provide an ability to apply a nonzero-jump, zero-flux-jump constraint across a stationary XFEM interface for one variable in 3D.
Specification(s): stationary_jump_3d
Design: XFEMSingleVariableConstraint
Issue(s): #6572
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.14.4The XFEM module shall provide an ability to apply a nonzero-jump, nonzero-flux-jump constraint across a stationary XFEM interface for one variable in 3D.
Specification(s): stationary_jump_fluxjump_3d
Design: XFEMSingleVariableConstraint
Issue(s): #6572
Collection(s): FUNCTIONAL
Type(s): Exodiff
29

xfem: Solid Mechanics Basic
9.15.1The XFEM module shall represent a propagating crack in a 2D mechanics problem in which crack growth occurs when the average stress in the element at the crack tip exceeds a critical value.
Specification(s): crack_propagation_ave
Design: XFEMRankTwoTensorMarkerUserObject
Issue(s): #6320
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.15.2The XFEM module shall represent a propagating crack in a 2D mechanics problem in which crack growth occurs when the average stress in the element at the crack tip exceeds a critical value defined by the value of a field variable.
Specification(s): crack_propagation_var
Design: XFEMRankTwoTensorMarkerUserObject
Issue(s): #6320
Collection(s): FUNCTIONAL
Type(s): Exodiff
Prerequisite(s): 9.15.1
29
9.15.3The XFEM module shall represent a propagating crack in a 2D mechanics problem in which crack growth occurs when the stress at any of the quadrature points in the element at the crack tip exceeds a critical value defined by the value of a field variable.
Specification(s): crack_propagation_single_point
Design: XFEMRankTwoTensorMarkerUserObject
Issue(s): #6320
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.15.4The XFEM module shall permit definition of a stationary crack in a 3D mechanics model with XFEM, where the crack is defined using a rectangular cutting plane by RectangleCutUserObject
Specification(s): edge_crack_3d
Design: RectangleCutUserObject
Issue(s): #6320
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.15.5The XFEM module shall represent a propagating crack in a 3D mechanics model with XFEM, where the crack is defined using a topologically surface cutting mesh by CrackMeshCut3DUserObject and allowed to propagate with growth speeds determined by the fatigue cracking Paris law
Specification(s): edge_crack_3d_fatigue
Design: CrackMeshCut3DUserObject
Issue(s): #6320
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.15.6The XFEM module shall represent a propagating crack in a 3D mechanics model with XFEM, where the crack is defined using a topologically surface cutting mesh by CrackMeshCut3DUserObject and allowed to propagate with growth directions determined by the maximum hoop stress law
Specification(s): edge_crack_3d_mhs
Design: CrackMeshCut3DUserObject
Issue(s): #6320
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.15.7The XFEM module shall represent a propagating crack in a 3D mechanics model with XFEM, where the crack is defined using a topologically surface cutting mesh by CrackMeshCut3DUserObject
Specification(s): edge_crack_3d_propagation
Design: CrackMeshCut3DUserObject
Issue(s): #6320
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.15.8The XFEM module shall permit definition of a stationary crack in a 3D mechanics model with XFEM, where the crack is defined using an elliptical cutting plane by EllipseCutUserObject
Specification(s): elliptical_crack
Design: EllipseCutUserObject
Issue(s): #6320
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.15.9The XFEM system shall permit computation of fracture domain integrals in 3D mechanics problems where a stationary embedded circular crack is defined by a cutting plane geometry and points along the crack front for the domain integral are explicitly specified.
Specification(s): penny_crack
Design: DomainIntegral System CircleCutUserObject
Issue(s): #6320
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.15.10The XFEM system shall permit computation of fracture domain integrals in 3D mechanics problems where a stationary embedded circular crack is defined by a cutting plane geometry and points along the crack front for the domain integral provided by a class that derives from CrackFrontPointsProvider.
Specification(s): penny_crack_cfp
Design: DomainIntegral System CircleCutUserObject
Issue(s): #6320
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.15.11The XFEM system shall permit branched cracks to be represented in 2D by sequentially cutting a 4-noded quadrilateral element by two prescribed evolving cutting planes
Specification(s): square_branch_quad_2d
Design: XFEM
Issue(s): #6320
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.15.12The XFEM system shall permit branched cracks to be represented in 2D by sequentially cutting a 3-noded triangle element by two prescribed evolving cutting planes
Specification(s): square_branch_tri_2d
Design: XFEM
Issue(s): #6320
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.15.13The XFEM system shall provide an accessor function to the crack_tip_origin_direction_map
Specification(s): test_crack_counter
Design: XFEM
Issue(s): #6320
Collection(s): FUNCTIONAL
Type(s): CSVDiff
29

xfem: Switching Material
9.16.1The XFEM module shall provide an ability to switch materials for one stationary cut.
Specification(s): one_cut_stationary
Design: XFEMCutSwitchingMaterial CutSubdomainIDAux
Issue(s): #17041
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.16.2The XFEM module shall provide an ability to switch materials for one moving cut.
Specification(s): one_cut_moving
Design: XFEMCutSwitchingMaterial CutSubdomainIDAux
Issue(s): #17041
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.16.3The XFEM module shall allow switching materials based on the side of an interface for a single moving cut defined using a mesh as the cutting object.
Specification(s): one_cut_moving_using_mesh_cut
Design: XFEMCutSwitchingMaterial CutSubdomainIDAux
Issue(s): #17041 #17797
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.16.4The XFEM module shall provide an ability to switch materials for two stationary cuts.
Specification(s): two_cuts_stationary
Design: XFEMCutSwitchingMaterial CutSubdomainIDAux ComboCutUserObject
Issue(s): #17041
Collection(s): FUNCTIONAL
Type(s): Exodiff
29
9.16.5The XFEM module shall provide an ability to switch materials for two moving cuts.
Specification(s): two_cuts_moving
Design: XFEMCutSwitchingMaterial CutSubdomainIDAux ComboCutUserObject
Issue(s): #17041
Collection(s): FUNCTIONAL
Type(s): Exodiff
29

Usability Requirements

Performance Requirements

System Interface Requirements

References

No citations exist within this document.

[./glued_bimaterial]
  type = Exodiff
  input = glued_bimaterials_2d.i
  exodiff = 'glued_bimaterials_2d_out.e'
  abs_zero = 1e-8
  use_old_floor = true
  map = false
  unique_id = true
  requirement = 'The XFEM module shall have the capability to calculate mechanical response in two glued, layered materials with the interface location and material properties applied to on each side of the boundary determined by a level set function.'
  design = 'LevelSetCutUserObject.md XFEMSingleVariableConstraint.md'
  issues = '#10421'
[../]


[./inclusion_bimaterial]
  type = Exodiff
  input = inclusion_bimaterials_2d.i
  exodiff = 'inclusion_bimaterials_2d_out.e'
  abs_zero = 1e-8
  use_old_floor = true
  map = false
  unique_id = true
  requirement = 'The XFEM module shall have the capability to calculate mechanical response in a composite material matrix with an inclusion with the location of the inclusion boundary and material properties applied to the matrix and inclusion determined by a prescribed level set function.'
  design = 'LevelSetCutUserObject.md XFEMSingleVariableConstraint.md'
  issues = '#10421'
[../]


[./glued_ad_bimaterial]
  type = Exodiff
  input = glued_ad_bimaterials_2d.i
  exodiff = 'glued_bimaterials_2d_out.e'
  abs_zero = 1e-8
  use_old_floor = true
  map = false
  unique_id = true
  prereq = glued_bimaterial
  requirement = 'The system shall have the capability to calculate the mechanical response in two glued, layered materials with the interface location and automatic differentiation material properties applied to on each side of the boundary determined by a level set function.'
  design = 'LevelSetBiMaterialRankTwo.md LevelSetBiMaterialRankFour.md'
  issues = '#15437'
[../]


[./inclusion_ad_bimaterial]
  type = Exodiff
  input = inclusion_ad_bimaterials_2d.i
  exodiff = 'inclusion_bimaterials_2d_out.e'
  abs_zero = 1e-8
  use_old_floor = true
  map = false
  unique_id = true
  prereq = inclusion_bimaterial
  requirement = 'The XFEM module shall have the capability to calculate mechanical response in a composite material matrix with an inclusion with the location of the inclusion boundary and material properties applied to the matrix and inclusion determined by a prescribed level set function using automatic differentiation.'
  design = 'LevelSetBiMaterialRankTwo.md'
  issues = '#15437'
[../]

[checkpoint]
  type = 'CheckFiles'
  input = checkpoint.i
  max_parallel = 1
  max_threads = 1
  check_files = 'checkpoint_out_cp/0001.xdr
                  checkpoint_out_cp/0001.xdr.0000
                  checkpoint_out_cp/0001.rd-0
                  checkpoint_out_cp/0001_mesh.cpr/1/header.cpr
                  checkpoint_out_cp/0002.xdr
                  checkpoint_out_cp/0002.xdr.0000
                  checkpoint_out_cp/0002.rd-0
                  checkpoint_out_cp/0002_mesh.cpr/1/header.cpr'
  requirement = 'The XFEM module shall support outputting of checkpoint files.'
  design = 'outputs/Checkpoint.md'
  issues = '#17063'
[]

[./corner_node_cut_twice]
  type = Exodiff
  input = corner_node_cut_twice.i
  exodiff = 'corner_node_cut_twice_out.e'
  map = false
  unique_id = true
  requirement = 'The XFEM module shall have the capability of cutting directly through multiple nodes of a single QUAD4 element in 2D.'
  design = 'LineSegmentCutUserObject.md'
  issues = '#6320'
[../]


[./corner_edge_cut]
  type = Exodiff
  input = corner_edge_cut.i
  exodiff = 'corner_edge_cut_out.e'
  map = false
  unique_id = true
  requirement = 'The XFEM module shall be able to perform mesh cuts on any combination of the edges of elements and through elements including allowing cuts that go through the nodes on the same mesh.'
  design = 'LineSegmentCutUserObject.md'
  issues = '#6320'
[../]


[./corner_node_cut]
  type = Exodiff
  input = corner_node_cut.i
  exodiff = 'corner_node_cut_out.e'
  map = false
  unique_id = true
  requirement = 'The XFEM module shall have the capability of perfoming mesh cuts on the edges of elements such that only two new nodes are generated to separate the previously connected elements.'
  design = 'LineSegmentCutUserObject.md'
  issues = '#6320'
[../]


[./notch]
  type = Exodiff
  input = notch.i
  exodiff = 'notch_out.e'
  map = false
  unique_id = true
  requirement = 'The XFEM module shall be capable of propagating an existing crack front along a prescribed cut in 2D.'
  design = 'LineSegmentCutUserObject.md'
  issues = '#6320'
[../]

[./crack_tip_enrichment_edge_2d]
  type = Exodiff
  input = edge_crack_2d.i
  exodiff = 'edge_crack_2d_out.e'
  map = false
  unique_id = true
  superlu = true
  requirement = 'The XFEM module shall have the capability to include near-tip enrichment functions in 2D mechanics simulations.'
  design = 'LineSegmentCutUserObject.md CrackTipEnrichmentStressDivergenceTensors.md'
  issues = '#10042'
[../]


[./crack_tip_enrichment_penny_crack_3d]
  type = Exodiff
  input = penny_crack_3d.i
  exodiff = 'penny_crack_3d_out.e'
  map = false
  unique_id = true
  heavy = true
  superlu = true
  max_time = 400 # Slow test
  requirement = 'The XFEM module shall have the capability to include near-tip enrichment functions in 3D mechanics simulations.'
  design = 'CircleCutUserObject.md CrackTipEnrichmentStressDivergenceTensors.md'
  issues = '#10042'

  method = '!dbg' #Slow test
[../]

[./diffusion_xfem]
  type = Exodiff
  input = diffusion.i
  exodiff = 'diffusion_out.e'
  map = false
  unique_id = true
  requirement = 'The XFEM Module shall have the capability to run 2D diffusion problems with prescribed values on the domain boundary (Dirichlet conditions) with a fixed position discontinuous interface through mesh elements.'
  design = 'LineSegmentCutUserObject.md'
  issues = '#6320'
[../]


[./diffusion_xfem_flux_bc]
  type = Exodiff
  input = diffusion_flux_bc.i
  exodiff = 'diffusion_flux_bc_out.e'
  map = false
  unique_id = true
  requirement = 'The XFEM Module shall have the capability to run 2D diffusion problems with prescribed solution values on the domain boundary (Dirichlet conditions) and prescribed boundary flux values (Neumann conditions) with a fixed position discontinuous interface defined by a geometric cut user object.'
  design = 'LineSegmentCutUserObject.md'
  issues = '#6320'
[../]


[./levelsetcut2d]
  type = Exodiff
  input = levelsetcut2d.i
  exodiff = 'levelsetcut2d_out.e'
  map = false
  unique_id = true
  requirement = 'The XFEM Module shall have the capability to run 2D diffusion problems with a fixed position discontinuous interface defined by the location of the zero values of a level set function with the level set variable being a Moose Variable.'
  design = 'LevelSetCutUserObject.md'
  issues = '#6320'
[../]


[./levelsetcut2d_aux]
  type = Exodiff
  input = levelsetcut2d_aux.i
  exodiff = 'levelsetcut2d_aux_out.e'
  map = false
  unique_id = true
  requirement = 'The XFEM Module shall have the capability to run 2D diffusion problems with a fixed position discontinuous interface defined by the location of the zero values of a prescribed level set function with the level set variable being a Moose AuxVariable.'
  design = 'LevelSetCutUserObject.md'
  issues = '#6320'
[../]


[./levelsetcut3d]
  type = Exodiff
  input = levelsetcut3d.i
  exodiff = 'levelsetcut3d_out.e'
  map = false
  unique_id = true
  requirement = 'The XFEM Module shall have the capability to run 3D diffusion problems with a fixed position discontinuous interface defined by the location of the zero values of a prescribed level set function with the level set variable being a Moose AuxVariable.'
  design = 'LevelSetCutUserObject.md'
  issues = '#6320'
[../]

[./init_solution_propagation]
  type = Exodiff
  input = init_solution_propagation.i
  exodiff = 'init_solution_propagation_out.e init_solution_propagation_out.e-s002 init_solution_propagation_out.e-s003 init_solution_propagation_out.e-s004 init_solution_propagation_out.e-s005 init_solution_propagation_out.e-s006'
  abs_zero = 1e-8
  map = false
  # XFEM requires --enable-unique-ids in libmesh
  min_parallel = 4
  unique_id = true
  requirement = 'The XFEM module shall retain the values of auxiliary variables on child nodes and elements after running the cutting algorithm, and initialize solution variables on newly created nodes with values from parent nodes in parallel'
  design = 'XFEM/index.md'
  issues = '#8763'
[../]

[./glued_penalty]
  type = Exodiff
  input = glued_penalty.i
  exodiff = 'glued_penalty_out.e'
  abs_zero = 1e-8
  use_old_floor = true
  map = false
  unique_id = true
  design = 'XFEM/index.md'
  issues = '#6320'
  requirement = 'The XFEM module shall permit applying a glued constraint across the XFEM interface for 2D solid mechanics problems.'
[../]


[./solid_mechanics_moment_fitting]
  type = Exodiff
  input = solid_mechanics_moment_fitting.i
  exodiff = 'solid_mechanics_moment_fitting_out.e'
  map = false
  # XFEM requires --enable-unique-ids in libmesh
  unique_id = true
  requirement = 'The XFEM module shall permit the use of the moment fitting algorithm to compute integration point weights for partial elements on 2D solid mechanics problems'
[../]


[./diffusion_moment_fitting_four_points]
  type = Exodiff
  input = diffusion_moment_fitting_four_points.i
  exodiff = 'diffusion_moment_fitting_four_points_out.e'
  map = false
  unique_id = true
  requirement = 'The XFEM module shall permit the use of the moment fitting algorithm to compute integration point weights for partial elements on 2D problems with a 4-point integration rule'
[../]


[./diffusion_moment_fitting_six_points]
  type = Exodiff
  input = diffusion_moment_fitting_six_points.i
  exodiff = 'diffusion_moment_fitting_six_points_out.e'
  map = false
  unique_id = true
  requirement = 'The XFEM module shall permit the use of the moment fitting algorithm to compute integration point weights for partial elements on 2D problems with a 6-point integration rule'
[../]

[moving_interface]
  type = Exodiff
  input = moving_level_set.i
  exodiff = 'moving_level_set_out.e moving_level_set_out.e-s002 moving_level_set_out.e-s003'
  map = false
  unique_id = true
  requirement = 'The XFEM module shall provide an ability to specify whether an XFEM cut surface should be healed independently for individual interfaces'
  design = 'LineSegmentCutSetUserObject.md LevelSetCutUserObject.md'
  issues = '#11259'
[]


[moving_interface_debug_output_0]
  prereq = moving_interface
  type = RunApp
  input = moving_level_set.i
  cli_args = 'XFEM/debug_output_level=0'
  unique_id = true
  absent_out = 'XFEM mesh cutting with element fragment algorithm complete'
  requirement = 'The XFEM module shall not output summary information on mesh changes when debug_output_level=0'
  design = 'XFEM/index.md'
  issues = '#13666'
[]


[moving_interface_debug_output_1]
  prereq = moving_interface_debug_output_0
  type = RunApp
  input = moving_level_set.i
  cli_args = 'XFEM/debug_output_level=1'
  unique_id = true
  expect_out = 'XFEM mesh cutting with element fragment algorithm complete'
  requirement = 'The XFEM module shall output summary information on mesh changes when debug_output_level=1'
  design = 'XFEM/index.md'
  issues = '#13666'
[]


[moving_interface_debug_output_2]
  prereq = moving_interface_debug_output_1
  type = RunApp
  input = moving_level_set.i
  cli_args = 'XFEM/debug_output_level=2'
  unique_id = true
  expect_out = 'XFEM added new node:'
  requirement = 'The XFEM module shall output detailed information on mesh changes when debug_output_level=2'
  design = 'XFEM/index.md'
  issues = '#13666'
[]


[moving_interface_debug_output_3]
  prereq = moving_interface_debug_output_2
  type = RunApp
  input = moving_level_set.i
  cli_args = 'XFEM/debug_output_level=3'
  unique_id = true
  expect_out = 'XFEM Element fragment algorithm mesh prior to cutting:'
  requirement = 'The XFEM module shall output detailed information on mesh changes when debug_output_level=3'
  design = 'XFEM/index.md'
  issues = '#13666'
[]


[moving_bimaterials]
  type = Exodiff
  input = moving_bimaterial.i
  exodiff = 'moving_bimaterial_out.e moving_bimaterial_out.e-s002'
  map = false
  unique_id = true
  requirement = 'The XFEM module shall provide an ability to solve bi-material mechanics problems where a moving material interface is defined by an XFEM surface, which is defined by a prescribed level set field.'
  design = 'LevelSetBiMaterialRankTwo.md LevelSetBiMaterialRankFour.md XFEMSingleVariableConstraint.md'
  issues = '#11259 #15096'
[]


[moving_ad_bimaterials]
  type = Exodiff
  input = moving_ad_bimaterial.i
  exodiff = 'moving_bimaterial_out.e moving_bimaterial_out.e-s002'
  map = false
  unique_id = true
  prereq = moving_bimaterials
  requirement = 'The XFEM module shall provide an ability to solve bi-material mechanics problems where a moving material interface is defined by an XFEM surface, which is defined by a prescribed level set field, while using the automatic differentiation capability.'
  design = 'LevelSetBiMaterialRankTwo.md LevelSetBiMaterialRankFour.md'
  issues = '#15437'
[]


[moving_bimaterial_finite_strain]
  type = Exodiff
  input = moving_bimaterial_finite_strain.i
  exodiff = 'moving_bimaterial_finite_strain_out.e moving_bimaterial_finite_strain_out.e-s002 moving_bimaterial_finite_strain_out.e-s003 moving_bimaterial_finite_strain_out.e-s004 moving_bimaterial_finite_strain_out.e-s005'
  map = false
  unique_id = true
  requirement = 'The XFEM module shall provide an ability to solve bi-material mechanics problems at finite strain where a moving material interface is defined by an XFEM surface, which is defined by a prescribed level set field.'
  design = 'LevelSetBiMaterialRankTwo.md LevelSetBiMaterialRankFour.md XFEMSingleVariableConstraint.md'
  issues = '#15817'
[]


[moving_bimaterial_finite_strain_esm]
  type = Exodiff
  input = moving_bimaterial_finite_strain_esm.i
  exodiff = 'moving_bimaterial_finite_strain_esm_out.e moving_bimaterial_finite_strain_esm_out.e-s002 moving_bimaterial_finite_strain_esm_out.e-s003 moving_bimaterial_finite_strain_esm_out.e-s004 moving_bimaterial_finite_strain_esm_out.e-s005'
  map = false
  unique_id = true
  requirement = 'The XFEM module shall provide an ability to modify subdomain IDs based on an XFEM interface.'
  design = 'CutElementSubdomainModifier.md'
  issues = '#15817'
[]


[moving_diffusion]
  type = Exodiff
  input = moving_diffusion.i
  exodiff = 'moving_diffusion_out.e moving_diffusion_out.e-s002'
  map = false
  unique_id = true
  requirement = 'The XFEM module shall provide an ability to solve bi-material diffusion problems where a moving material interface is defined by an XFEM surface, which is defined by a prescribed level set field.'
  design = 'LevelSetBiMaterialReal.md XFEMEqualValueAtInterface.md LevelSetCutUserObject.md'
  issues = '#11749'
[]


[moving_ad_diffusion]
  type = Exodiff
  input = moving_ad_diffusion.i
  exodiff = 'moving_diffusion_out.e moving_diffusion_out.e-s002'
  map = false
  unique_id = true
  prereq = moving_diffusion
  requirement = 'The XFEM module shall provide an ability to solve bi-material diffusion problems where a moving material interface is defined by an XFEM surface, which is defined by a prescribed level set field, while using automatic differentiation.'
  design = 'LevelSetBiMaterialReal.md'
  issues = '#15437'
[]


[phase_transition_2d]
  type = Exodiff
  input = phase_transition_2d.i
  exodiff = 'phase_transition_2d_out.e  phase_transition_2d_out.e-s002  phase_transition_2d_out.e-s003  phase_transition_2d_out.e-s004'
  map = false
  unique_id = true
  abs_zero = 1e-8
  requirement = 'The XFEM module shall provide an ability to solve a simple 2d phase transition problem in which the phase boundary is defined by and XFEM surface and the interface velocity depends on the jump of variables and gradients across the interface.'
  design = 'LevelSetBiMaterialReal.md XFEMEqualValueAtInterface.md MeshCutLevelSetAux.md XFEMPhaseTransitionMovingInterfaceVelocity.md NodeValueAtXFEMInterface.md InterfaceMeshCut2DUserObject.md'
  issues = '#11749 #17797'
[]


[phase_transition_3d]
  type = Exodiff
  input = phase_transition_3d.i
  exodiff = 'phase_transition_3d_out.e  phase_transition_3d_out.e-s002  phase_transition_3d_out.e-s003  phase_transition_3d_out.e-s004'
  map = false
  unique_id = true
  abs_zero = 1e-8
  requirement = 'The XFEM module shall provide an ability to solve a simple 3d phase transition problem in which the phase boundary is defined by and XFEM surface and the interface velocity depends on the jump of variables and gradients across the interface.'
  design = 'LevelSetBiMaterialReal.md XFEMEqualValueAtInterface.md MeshCutLevelSetAux.md XFEMPhaseTransitionMovingInterfaceVelocity.md NodeValueAtXFEMInterface.md InterfaceMeshCut3DUserObject.md'
  issues = '#11749 #17797'
[]


[ad_phase_transition_2d]
  type = Exodiff
  input = ad_phase_transition_2d.i
  exodiff = 'phase_transition_2d_out.e  phase_transition_2d_out.e-s002  phase_transition_2d_out.e-s003  phase_transition_2d_out.e-s004'
  map = false
  unique_id = true
  abs_zero = 1e-8
  prereq = phase_transition_2d
  requirement = 'The XFEM module shall provide an ability to solve a 2d simple phase transition problem in which the phase boundary is defined by and XFEM surface and the interface velocity depends on the jump of variables and gradients across the interface using the automatic differentiation capability.'
  design = 'LevelSetBiMaterialReal.md'
  issues = '#15437'
[]


[cut_mesh_2d]
  type = Exodiff
  input = cut_mesh_2d.i
  exodiff = 'cut_mesh_2d_out.e  cut_mesh_2d_out.e-s002 cut_mesh_2d_out_cut_mesh.e'
  map = false
  unique_id = true
  abs_zero = 1e-5
  requirement = 'The XFEM module shall provide an ability to cut one block with a moving circle surface mesh in 2D.'
  design = 'InterfaceMeshCut2DUserObject.md'
  issues = '#17797'
[]


[cut_mesh_3d]
  type = Exodiff
  input = cut_mesh_3d.i
  exodiff = 'cut_mesh_3d_out.e  cut_mesh_3d_out.e-s002 cut_mesh_3d_out_cut_mesh.e'
  map = false
  unique_id = true
  abs_zero = 1e-5
  requirement = 'The XFEM module shall provide an ability to cut one block with a moving cylinder surface mesh in 3D.'
  design = 'InterfaceMeshCut3DUserObject.md'
  issues = '#17797'
[]

[./1D_xy_homog1mat]
  type = Exodiff
  input = 1D_xy_homog1mat.i
  exodiff = '1D_xy_homog1mat_out.e 1D_xy_homog1mat_out.e-s002 1D_xy_homog1mat_out.e-s003 1D_xy_homog1mat_out.e-s004 1D_xy_homog1mat_out.e-s005'
  map = false
  unique_id = true
  allow_test_objects = True
  requirement = 'The XFEM module shall accurately solve 1D, xy problems with homogeneous material properties with a moving interface determined by a user prescribed level set function, and problem results are verified using the Method of Manufactured Solutions.'
  design = 'LevelSetCutUserObject.md'
  issues = '#12833'
[../]


[./1D_xy_lsdep1mat]
  type = Exodiff
  input = 1D_xy_lsdep1mat.i
  exodiff = '1D_xy_lsdep1mat_out.e 1D_xy_lsdep1mat_out.e-s002 1D_xy_lsdep1mat_out.e-s003 1D_xy_lsdep1mat_out.e-s004 1D_xy_lsdep1mat_out.e-s005'
  map = false
  unique_id = true
  allow_test_objects = True
  requirement = 'The XFEM module shall accurately solve 1D, xy problems with material properties and a moving interface dependent on a user prescribed level set function, and problem results are verified using the Method of Manufactured Solutions.'
  design = 'LevelSetCutUserObject.md'
  issues = '#12833'
[../]


[./1D_xy_discrete2mat]
  type = Exodiff
  input = 1D_xy_discrete2mat.i
  exodiff = '1D_xy_discrete2mat_out.e 1D_xy_discrete2mat_out.e-s002 1D_xy_discrete2mat_out.e-s003 1D_xy_discrete2mat_out.e-s004'
  map = false
  unique_id = true
  allow_test_objects = True
  requirement = 'The XFEM module shall accurately solve 1D, xy problems with a moving interface separating two discrete materials prescribed by a user defined level set function with problem results verified using the Method of Manufactured Solutions.'
  design = 'LevelSetCutUserObject.md XFEMSingleVariableConstraint.md'
  issues = '#13756'
[../]


[./1D_rz_homog1mat]
  type = Exodiff
  input = 1D_rz_homog1mat.i
  exodiff = '1D_rz_homog1mat_out.e 1D_rz_homog1mat_out.e-s002 1D_rz_homog1mat_out.e-s003 1D_rz_homog1mat_out.e-s004 1D_rz_homog1mat_out.e-s005'
  map = false
  unique_id = true
  allow_test_objects = True
  requirement = 'The XFEM module shall accurately solve 1D, rz problems with homogeneous material properties with a moving interface determined by a user prescribed level set function, and problem results are verified using the Method of Manufactured Solutions.'
  design = 'LevelSetCutUserObject.md'
  issues = '#12833'
[../]


[./1D_rz_lsdep1mat]
  type = Exodiff
  input = 1D_rz_lsdep1mat.i
  exodiff = '1D_rz_lsdep1mat_out.e 1D_rz_lsdep1mat_out.e-s002 1D_rz_lsdep1mat_out.e-s003 1D_rz_lsdep1mat_out.e-s004 1D_rz_lsdep1mat_out.e-s005'
  map = false
  unique_id = true
  allow_test_objects = True
  requirement = 'The XFEM module shall accurately solve 1D, rz problems with material properties and a moving interface dependent on a user prescribed level set function, and problem results are verified using the Method of Manufactured Solutions.'
  design = 'LevelSetCutUserObject.md'
  issues = '#12833'
[../]


[./2D_xy_homog1mat]
  type = Exodiff
  input = 2D_xy_homog1mat.i
  exodiff = '2D_xy_homog1mat_out.e 2D_xy_homog1mat_out.e-s002 2D_xy_homog1mat_out.e-s003 2D_xy_homog1mat_out.e-s004 2D_xy_homog1mat_out.e-s005'
  map = false
  unique_id = true
  allow_test_objects = True
  requirement = 'The XFEM module shall accurately solve 2D, xy problems with homogeneous material properties with a moving interface determined by a user prescribed level set function, and problem results are verified using the Method of Manufactured Solutions.'
  design = 'LevelSetCutUserObject.md'
  issues = '#12833'
[../]


[./2D_xy_lsdep1mat]
  type = Exodiff
  input = 2D_xy_lsdep1mat.i
  exodiff = '2D_xy_lsdep1mat_out.e 2D_xy_lsdep1mat_out.e-s002 2D_xy_lsdep1mat_out.e-s003 2D_xy_lsdep1mat_out.e-s004 2D_xy_lsdep1mat_out.e-s005'
  map = false
  unique_id = true
  allow_test_objects = True
  requirement = 'The XFEM module shall accurately solve 2D, xy problems with material properties and a moving interface dependent on a user prescribed level set function, and problem results are verified using the Method of Manufactured Solutions.'
  design = 'LevelSetCutUserObject.md'
  issues = '#12833'
[../]


[./2D_rz_homog1mat]
  type = Exodiff
  input = 2D_rz_homog1mat.i
  exodiff = '2D_rz_homog1mat_out.e 2D_rz_homog1mat_out.e-s002 2D_rz_homog1mat_out.e-s003 2D_rz_homog1mat_out.e-s004 2D_rz_homog1mat_out.e-s005'
  map = false
  unique_id = true
  allow_test_objects = True
  requirement = 'The XFEM module shall accurately solve 2D, rz problems with homogeneous material properties with a moving interface determined by a user prescribed level set function, and problem results are verified using the Method of Manufactured Solutions.'
  design = 'LevelSetCutUserObject.md'
  issues = '#12833'
[../]


[./2D_rz_lsdep1mat]
  type = Exodiff
  input = 2D_rz_lsdep1mat.i
  exodiff = '2D_rz_lsdep1mat_out.e 2D_rz_lsdep1mat_out.e-s002 2D_rz_lsdep1mat_out.e-s003 2D_rz_lsdep1mat_out.e-s004 2D_rz_lsdep1mat_out.e-s005'
  map = false
  unique_id = true
  allow_test_objects = True
  requirement = 'The XFEM module shall accurately solve 2D, rz problems with material properties and a moving interface dependent on a user prescribed level set function, and problem results are verified using the Method of Manufactured Solutions.'
  design = 'LevelSetCutUserObject.md'
  issues = '#12833'
[../]


[./edge_2d_pressure]
  type = Exodiff
  input = edge_2d_pressure.i
  exodiff = 'edge_2d_pressure_out.e'
  map = false
  unique_id = true
  requirement = 'The XFEM module shall permit application of pressure boundary conditions to XFEM cut surfaces in 2D'
[../]


[./edge_3d_pressure]
  type = Exodiff
  input = edge_3d_pressure.i
  exodiff = 'edge_3d_pressure_out.e'
  map = false
  unique_id = true
  requirement = 'The XFEM module shall permit application of pressure boundary conditions to XFEM cut surfaces in 3D'
[../]


[./inclined_edge_2d_pressure]
  type = Exodiff
  input = inclined_edge_2d_pressure.i
  exodiff = 'inclined_edge_2d_pressure_out.e'
  map = false
  unique_id = true
  requirement = 'The XFEM module shall permit application of pressure boundary conditions to inclined XFEM cut surfaces in 2D'
[../]


[./2d_pressure_displaced_mesh]
  type = Exodiff
  input = 2d_pressure_displaced_mesh.i
  exodiff = '2d_pressure_displaced_mesh_out.e'
  map = false
  unique_id = true
  requirement = 'The XFEM module shall permit application of pressure boundary conditions to XFEM cut surfaces in 2D finite deformation simulations'
[../]


[./diffusion_2d_tri6]
  type = Exodiff
  input = diffusion_2d_tri6.i
  exodiff = 'diffusion_2d_tri6_out.e diffusion_2d_tri6_out.e-s002'
  map = false
  unique_id = true
  requirement = 'The XFEM module shall permit modeling of discontinuities represented with XFEM with second-order elements in 2D using TRI6 elements.'
[../]


[./diffusion_2d_quad8]
  type = Exodiff
  input = diffusion_2d_quad8.i
  exodiff = 'diffusion_2d_quad8_out.e diffusion_2d_quad8_out.e-s002'
  map = false
  unique_id = true
  requirement = 'The XFEM module shall permit modeling of discontinuities represented with XFEM with second-order elements in 2D using QUAD8 elements.'
[../]


[./diffusion_2d_quad9]
  type = Exodiff
  input = diffusion_2d_quad9.i
  exodiff = 'diffusion_2d_quad9_out.e diffusion_2d_quad9_out.e-s002'
  map = false
  unique_id = true
  requirement = 'The XFEM module shall permit modeling of discontinuities represented with XFEM with second-order elements in 2D using QUAD9 elements.'
[../]


[./diffusion_quad9_levelsetcut]
  type = Exodiff
  input = diffusion_quad9_levelsetcut.i
  exodiff = 'diffusion_quad9_levelsetcut_out.e'
  map = false
  unique_id = true
  requirement = 'The XFEM module shall permit modeling of discontinuities represented with XFEM with second-order elements in 2D using QUAD9 elements when the XFEM cutting plane is prescribed using a level set field.'
[../]


[./diffusion_3d_tet10]
  type = Exodiff
  input = diffusion_3d_tet10.i
  exodiff = 'diffusion_3d_tet10_out.e'
  map = false
  unique_id = true
  requirement = 'The XFEM module shall permit modeling of discontinuities represented with XFEM with second-order elements in 3D using TET10 elements when the XFEM cutting plane is prescribed using a level set field.'
[../]


[./diffusion_3d_hex20]
  type = Exodiff
  input = diffusion_3d_hex20.i
  exodiff = 'diffusion_3d_hex20_out.e'
  map = false
  unique_id = true
  requirement = 'The XFEM module shall permit modeling of discontinuities represented with XFEM with second-order elements in 3D using HEX20 elements when the XFEM cutting plane is prescribed using a level set field.'
[../]


[./diffusion_3d_hex27]
  type = Exodiff
  input = diffusion_3d_hex27.i
  exodiff = 'diffusion_3d_hex27_out.e'
  map = false
  unique_id = true
  requirement = 'The XFEM module shall permit modeling of discontinuities represented with XFEM with second-order elements in 3D using HEX27 elements when the XFEM cutting plane is prescribed using a level set field.'
[../]


[./square_branch_quad8_2d]
  type = Exodiff
  input = square_branch_quad8_2d.i
  exodiff = 'square_branch_quad8_2d_out.e square_branch_quad8_2d_out.e-s002 square_branch_quad8_2d_out.e-s003'
  map = false
  unique_id = true
  requirement = 'The XFEM module shall permit modeling of branching of discontinuities represented with XFEM by sequentially cutting second-order elements in 2D using QUAD8 elements.'
[../]


[./square_branch_quad9_2d]
  type = Exodiff
  input = square_branch_quad9_2d.i
  exodiff = 'square_branch_quad9_2d_out.e square_branch_quad9_2d_out.e-s002 square_branch_quad9_2d_out.e-s003'
  map = false
  unique_id = true
  requirement = 'The XFEM module shall permit modeling of branching of discontinuities represented with XFEM by sequentially cutting second-order elements in 2D using QUAD9 elements.'
[../]


[./square_branch_tri6_2d]
  type = Exodiff
  input = square_branch_tri6_2d.i
  exodiff = 'square_branch_tri6_2d_out.e square_branch_tri6_2d_out.e-s002 square_branch_tri6_2d_out.e-s003'
  map = false
  unique_id = true
  requirement = 'The XFEM module shall permit modeling of branching of discontinuities represented with XFEM by sequentially cutting second-order elements in 2D using TRI6 elements.'
[../]


[./side_integral_xfem]
  type = Exodiff
  input = side_integral.i
  exodiff = 'side_integral_out.e'
  map = false
  unique_id = true
  requirement = 'The XFEM module shall properly integrate quantities on sides of cut elements that are intersected by the cutting plane in 2D'
[../]


[./side_integral_3d_xfem]
  type = Exodiff
  input = side_integral_3d.i
  exodiff = 'side_integral_3d_out.e'
  map = false
  unique_id = true
  requirement = 'The XFEM module shall properly integrate quantities on sides of cut elements that are intersected by the cutting plane in 3D'
[../]

[./propagating_1field]
  type = Exodiff
  input = propagating_1field.i
  exodiff = 'propagating_1field_out.e propagating_1field_out.e-s002'
  map = false
  # XFEM requires --enable-unique-ids in libmesh
  unique_id = true
  requirement = 'The XFEM module shall provide an ability to apply a zero-jump, zero-flux-jump constraint across a propagating XFEM interface for one variable.'
  design = 'XFEMSingleVariableConstraint.md'
  issues = '#6572'
[../]


[./propagating_2field_1constraint]
  type = Exodiff
  input = propagating_2field_1constraint.i
  exodiff = 'propagating_2field_1constraint_out.e propagating_2field_1constraint_out.e-s002'
  map = false
  # XFEM requires --enable-unique-ids in libmesh
  unique_id = true
  requirement = 'The XFEM module shall provide an ability to apply a zero-jump, zero-flux-jump constraint across a propagating XFEM interface for one variable in a problem with another variable that does not have a constraint across that interface.'
  design = 'XFEMSingleVariableConstraint.md'
  issues = '#6572'
[../]


[./propagating_2field_2constraint]
  type = Exodiff
  input = propagating_2field_2constraint.i
  exodiff = 'propagating_2field_2constraint_out.e propagating_2field_2constraint_out.e-s002'
  map = false
  # XFEM requires --enable-unique-ids in libmesh
  unique_id = true
  requirement = 'The XFEM module shall provide an ability to apply zero-jump, zero-flux-jump constraints across a propagating XFEM interface for two variables.'
  design = 'XFEMSingleVariableConstraint.md'
  issues = '#6572'
[../]


[./stationary_equal]
  type = Exodiff
  input = stationary_equal.i
  exodiff = 'stationary_equal_out.e'
  map = false
  # XFEM requires --enable-unique-ids in libmesh
  unique_id = true
  requirement = 'The XFEM module shall provide an ability to apply a zero-jump, zero-flux-jump constraint on a stationary interface for one variable.'
  design = 'XFEMSingleVariableConstraint.md'
  issues = '#6572'
[../]


[./stationary_fluxjump]
  type = Exodiff
  input = stationary_fluxjump.i
  exodiff = 'stationary_fluxjump_out.e'
  map = false
  # XFEM requires --enable-unique-ids in libmesh
  unique_id = true
  requirement = 'The XFEM module shall provide an ability to apply a zero-jump, nonzero-flux-jump (defined by a Real value) constraint on a stationary interface for one variable.'
  design = 'XFEMSingleVariableConstraint.md'
  issues = '#6572'
[../]


[./stationary_fluxjump_func]
  type = Exodiff
  input = stationary_fluxjump_func.i
  exodiff = 'stationary_fluxjump_func_out.e'
  map = false
  # XFEM requires --enable-unique-ids in libmesh
  unique_id = true
  requirement = 'The XFEM module shall provide an ability to apply a zero-jump, nonzero-flux-jump (defined by a function) constraint on a stationary interface for one variable.'
  design = 'XFEMSingleVariableConstraint.md'
  issues = '#13756'
[../]


[./stationary_jump]
  type = Exodiff
  input = stationary_jump.i
  exodiff = 'stationary_jump_out.e'
  map = false
  # XFEM requires --enable-unique-ids in libmesh
  unique_id = true
  requirement = 'The XFEM module shall provide an ability to apply a nonzero-jump (defined by a Real value), zero-flux-jump constraint on a stationary interface for one variable.'
  design = 'XFEMSingleVariableConstraint.md'
  issues = '#6572'
[../]


[./stationary_jump_func]
  type = Exodiff
  input = stationary_jump_func.i
  exodiff = 'stationary_jump_func_out.e'
  map = false
  # XFEM requires --enable-unique-ids in libmesh
  unique_id = true
  requirement = 'The XFEM module shall provide an ability to apply a nonzero-jump (defined by a function), zero-flux-jump constraint on a stationary interface for one variable.'
  design = 'XFEMSingleVariableConstraint.md'
  issues = '#13756'
[../]


[./stationary_jump_fluxjump]
  type = Exodiff
  input = stationary_jump_fluxjump.i
  exodiff = 'stationary_jump_fluxjump_out.e'
  map = false
  # XFEM requires --enable-unique-ids in libmesh
  unique_id = true
  abs_zero = 1e-8
  requirement = 'The XFEM module shall provide an ability to apply a nonzero-jump, nonzero-flux-jump constraint on a stationary interface for one variable.'
  design = 'XFEMSingleVariableConstraint.md'
  issues = '#6572'
[../]


[./equal_value]
  type = Exodiff
  input = equal_value.i
  exodiff = 'equal_value_out.e'
  map = false
  # XFEM requires --enable-unique-ids in libmesh
  unique_id = true
  requirement = 'The XFEM module shall provide an ability to apply a two-sided equal value constraint on a stationary interface for one variable.'
  design = 'XFEMEqualValueAtInterface.md'
  issues = '#11750'
[../]

[./stationary_equal_3d]
  type = Exodiff
  input = stationary_equal_3d.i
  exodiff = 'stationary_equal_3d_out.e'
  map = false
  # XFEM requires --enable-unique-ids in libmesh
  unique_id = true
  requirement = 'The XFEM module shall provide an ability to apply a zero-jump, zero-flux-jump constraint across a stationary XFEM interface for one variable in 3D.'
  design = 'XFEMSingleVariableConstraint.md'
  issues = '#6572'
[../]


[./stationary_fluxjump_3d]
  type = Exodiff
  input = stationary_fluxjump_3d.i
  exodiff = 'stationary_fluxjump_3d_out.e'
  map = false
  # XFEM requires --enable-unique-ids in libmesh
  unique_id = true
  requirement = 'The XFEM module shall provide an ability to apply a zero-jump, nonzero-flux-jump constraint across a stationary XFEM interface for one variable in 3D.'
  design = 'XFEMSingleVariableConstraint.md'
  issues = '#6572'
[../]


[./stationary_jump_3d]
  type = Exodiff
  input = stationary_jump_3d.i
  exodiff = 'stationary_jump_3d_out.e'
  map = false
  # XFEM requires --enable-unique-ids in libmesh
  unique_id = true
  requirement = 'The XFEM module shall provide an ability to apply a nonzero-jump, zero-flux-jump constraint across a stationary XFEM interface for one variable in 3D.'
  design = 'XFEMSingleVariableConstraint.md'
  issues = '#6572'
[../]


[./stationary_jump_fluxjump_3d]
  type = Exodiff
  input = stationary_jump_fluxjump_3d.i
  exodiff = 'stationary_jump_fluxjump_3d_out.e'
  map = false
  # XFEM requires --enable-unique-ids in libmesh
  unique_id = true
  abs_zero = 1e-8
  requirement = 'The XFEM module shall provide an ability to apply a nonzero-jump, nonzero-flux-jump constraint across a stationary XFEM interface for one variable in 3D.'
  design = 'XFEMSingleVariableConstraint.md'
  issues = '#6572'
[../]


[./crack_propagation_ave]
  type = Exodiff
  input = crack_propagation_2d.i
  exodiff = 'crack_propagation_2d_out.e crack_propagation_2d_out.e-s002'
  abs_zero = 1e-8
  map = false
  # XFEM requires --enable-unique-ids in libmesh
  unique_id = true
  requirement = 'The XFEM module shall represent a propagating crack in a 2D mechanics problem in which crack growth occurs when the average stress in the element at the crack tip exceeds a critical value.'
  design = 'XFEMRankTwoTensorMarkerUserObject.md'
[../]


[./crack_propagation_var]
  prereq = crack_propagation_ave
  type = Exodiff
  input = crack_propagation_2d.i
  #Use an AuxVariable to define the threshold
  cli_args = 'AuxVariables/threshold/order=CONSTANT AuxVariables/threshold/family=MONOMIAL AuxVariables/threshold/initial_condition=50 AuxVariables/threshold/outputs=none UserObjects/xfem_marker_uo/threshold=threshold'
  exodiff = 'crack_propagation_2d_out.e crack_propagation_2d_out.e-s002'
  abs_zero = 1e-8
  map = false
  # XFEM requires --enable-unique-ids in libmesh
  unique_id = true
  requirement = 'The XFEM module shall represent a propagating crack in a 2D mechanics problem in which crack growth occurs when the average stress in the element at the crack tip exceeds a critical value defined by the value of a field variable.'
  design = 'XFEMRankTwoTensorMarkerUserObject.md'
[../]


[./crack_propagation_single_point]
  type = Exodiff
  input = crack_propagation_2d.i
  # Deactivate topx BC to make stress state non-symmetric and fail at a single deterministic point
  cli_args = 'UserObjects/xfem_marker_uo/average=false BCs/active="bottomx bottomy topy" Outputs/file_base=crack_propagation_2d_single_point_out'
  exodiff = 'crack_propagation_2d_single_point_out.e crack_propagation_2d_single_point_out.e-s002'
  abs_zero = 1e-8
  map = false
  # XFEM requires --enable-unique-ids in libmesh
  unique_id = true
  requirement = 'The XFEM module shall represent a propagating crack in a 2D mechanics problem in which crack growth occurs when the stress at any of the quadrature points in the element at the crack tip exceeds a critical value defined by the value of a field variable.'
  design = 'XFEMRankTwoTensorMarkerUserObject.md'
[../]


[./edge_crack_3d]
  type = Exodiff
  input = edge_crack_3d.i
  exodiff = 'edge_crack_3d_out.e'
  abs_zero = 1e-8
  map = false
  # XFEM requires --enable-unique-ids in libmesh
  unique_id = true
  requirement = 'The XFEM module shall permit definition of a stationary crack in a 3D mechanics model with XFEM, where the crack is defined using a rectangular cutting plane by RectangleCutUserObject'
  design = 'RectangleCutUserObject.md'
[../]


[./edge_crack_3d_fatigue]
  type = Exodiff
  input = edge_crack_3d_fatigue.i
  exodiff = 'edge_crack_3d_fatigue_out.e edge_crack_3d_fatigue_out.e-s002'
  abs_zero = 1e-8
  map = false
  # XFEM requires --enable-unique-ids in libmesh
  unique_id = true
  requirement = 'The XFEM module shall represent a propagating crack in a 3D mechanics model with XFEM, where the crack is defined using a topologically surface cutting mesh by CrackMeshCut3DUserObject and allowed to propagate with growth speeds determined by the fatigue cracking Paris law'
  design = 'CrackMeshCut3DUserObject.md'
[../]


[./edge_crack_3d_mhs]
  type = Exodiff
  input = edge_crack_3d_mhs.i
  exodiff = 'edge_crack_3d_mhs_out.e edge_crack_3d_mhs_out.e-s002 edge_crack_3d_mhs_out.e-s003'
  abs_zero = 1e-8
  map = false
  # XFEM requires --enable-unique-ids in libmesh
  unique_id = true
  requirement = 'The XFEM module shall represent a propagating crack in a 3D mechanics model with XFEM, where the crack is defined using a topologically surface cutting mesh by CrackMeshCut3DUserObject and allowed to propagate with growth directions determined by the maximum hoop stress law'
  design = 'CrackMeshCut3DUserObject.md'
[../]


[./edge_crack_3d_propagation]
  type = Exodiff
  input = edge_crack_3d_propagation.i
  exodiff = 'edge_crack_3d_propagation_out.e edge_crack_3d_propagation_out.e-s002'
  abs_zero = 1e-8
  map = false
  # XFEM requires --enable-unique-ids in libmesh
  unique_id = true
  requirement = 'The XFEM module shall represent a propagating crack in a 3D mechanics model with XFEM, where the crack is defined using a topologically surface cutting mesh by CrackMeshCut3DUserObject'
  design = 'CrackMeshCut3DUserObject.md'
[../]


[./elliptical_crack]
  type = Exodiff
  input = elliptical_crack.i
  exodiff = 'elliptical_crack_out.e'
  map = false
  # XFEM requires --enable-unique-ids in libmesh
  unique_id = true
  requirement = 'The XFEM module shall permit definition of a stationary crack in a 3D mechanics model with XFEM, where the crack is defined using an elliptical cutting plane by EllipseCutUserObject'
  design = 'EllipseCutUserObject.md'
[../]


[./penny_crack]
  type = Exodiff
  input = penny_crack.i
  exodiff = 'penny_crack_out.e'
  map = false
  # XFEM requires --enable-unique-ids in libmesh
  unique_id = true
  requirement = 'The XFEM system shall permit computation of fracture domain integrals in 3D mechanics problems where a stationary embedded circular crack is defined by a cutting plane geometry and points along the crack front for the domain integral are explicitly specified.'
  design = 'DomainIntegral/index.md CircleCutUserObject.md'
[../]


[./penny_crack_cfp]
  type = Exodiff
  input = penny_crack_cfp.i
  exodiff = 'penny_crack_cfp_out.e'
  map = false
  # XFEM requires --enable-unique-ids in libmesh
  unique_id = true
  requirement = 'The XFEM system shall permit computation of fracture domain integrals in 3D mechanics problems where a stationary embedded circular crack is defined by a cutting plane geometry and points along the crack front for the domain integral provided by a class that derives from CrackFrontPointsProvider.'
  design = 'DomainIntegral/index.md CircleCutUserObject.md'
[../]


[./square_branch_quad_2d]
  type = Exodiff
  input = square_branch_quad_2d.i
  exodiff = 'square_branch_quad_2d_out.e square_branch_quad_2d_out.e-s002 square_branch_quad_2d_out.e-s003'
  map = false
  # XFEM requires --enable-unique-ids in libmesh
  unique_id = true
  requirement = 'The XFEM system shall permit branched cracks to be represented in 2D by sequentially cutting a 4-noded quadrilateral element by two prescribed evolving cutting planes'
[../]


[./square_branch_tri_2d]
  type = Exodiff
  input = square_branch_tri_2d.i
  exodiff = 'square_branch_tri_2d_out.e square_branch_tri_2d_out.e-s002 square_branch_tri_2d_out.e-s003'
  map = false
  # XFEM requires --enable-unique-ids in libmesh
  unique_id = true
  requirement = 'The XFEM system shall permit branched cracks to be represented in 2D by sequentially cutting a 3-noded triangle element by two prescribed evolving cutting planes'
[../]


[./test_crack_counter]
  type = CSVDiff
  input = test_crack_counter.i
  csvdiff = 'test_crack_counter_out.csv'
  # XFEM requires --enable-unique-ids in libmesh
  unique_id = true
  requirement = 'The XFEM system shall provide an accessor function to the crack_tip_origin_direction_map'
  allow_test_objects = true
[../]

[one_cut_stationary]
  type = Exodiff
  input = one_cut_stationary.i
  exodiff = 'one_cut_stationary_out.e'
  map = false
  unique_id = true
  requirement = 'The XFEM module shall provide an ability to switch materials for one stationary cut.'
  design = 'XFEMCutSwitchingMaterial.md CutSubdomainIDAux.md'
  issues = '#17041'
[]


[one_cut_moving]
  type = Exodiff
  input = one_cut_moving.i
  exodiff = 'one_cut_moving_out.e one_cut_moving_out.e-s002 one_cut_moving_out.e-s003'
  map = false
  unique_id = true
  requirement = 'The XFEM module shall provide an ability to switch materials for one moving cut.'
  design = 'XFEMCutSwitchingMaterial.md CutSubdomainIDAux.md'
  issues = '#17041'
[]


[one_cut_moving_using_mesh_cut]
  type = Exodiff
  input = one_cut_moving_using_mesh_cut.i
  exodiff = 'one_cut_moving_using_mesh_cut_out.e one_cut_moving_using_mesh_cut_out.e-s002 one_cut_moving_using_mesh_cut_out.e-s003 one_cut_moving_using_mesh_cut_out_cut.e'
  map = false
  unique_id = true
  requirement = 'The XFEM module shall allow switching materials based on the side of an interface for a single moving cut defined using a mesh as the cutting object.'
  design = 'XFEMCutSwitchingMaterial.md CutSubdomainIDAux.md '
  issues = '#17041 #17797'
[]


[two_cuts_stationary]
  type = Exodiff
  input = two_cuts_stationary.i
  exodiff = 'two_cuts_stationary_out.e'
  map = false
  unique_id = true
  requirement = 'The XFEM module shall provide an ability to switch materials for two stationary cuts.'
  design = 'XFEMCutSwitchingMaterial.md CutSubdomainIDAux.md ComboCutUserObject.md'
  issues = '#17041'
[]


[two_cuts_moving]
  type = Exodiff
  input = two_cuts_moving.i
  exodiff = 'two_cuts_moving_out.e two_cuts_moving_out.e-s002 two_cuts_moving_out.e-s003'
  map = false
  unique_id = true
  requirement = 'The XFEM module shall provide an ability to switch materials for two moving cuts.'
  design = 'XFEMCutSwitchingMaterial.md CutSubdomainIDAux.md ComboCutUserObject.md'
  issues = '#17041'
[]

Introduction
Minimum System Requirements
System Requirements Traceability
References

Install MOOSE

New Users

Examples and Tutorials

Application Usage

Physics and Syntax

Application Development

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MOOSEDocs

Infrastructure

Questions

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INL Applications and Remote Access