Xfem Requirement Traceability Matrix

Introduction

The Requirement Traceability Matrix (RTM) for Xfem captures all requirements and maps each to the associated design documentation and associated test case.

Dependencies

The Xfem application is developed using MOOSE and is based on various modules, as such the RTM for Xfem is dependent upon the following documents.

• Framework Requirements Traceability Matrix
• Tensor Mechanics Requirement Traceability Matrix

Requirements

The following is a complete list for all the functional requirements including links to the design documents and test cases for Xfem.

• xfem: Bimaterials
• F9.1.1The 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: bimaterials:glued_bimaterial

  Design: LevelSetCutUserObject !syntax description /UserObjects/LevelSetCutUserObjectXFEMSingleVariableConstraint

  Issue(s): #10421

  20
• F9.1.2The 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: bimaterials:inclusion_bimaterial

  Design: LevelSetCutUserObject !syntax description /UserObjects/LevelSetCutUserObjectXFEMSingleVariableConstraint

  Issue(s): #10421

  20

• xfem: Corner Nodes Cut
• F9.2.1The XFEM module shall have the capability of cutting directly through multiple nodes of a single QUAD4 element in 2D using deprecated SolidMechanics methods.

  Specification: corner_nodes_cut/sm:corner_node_cut_twice

  Design: LineSegmentCutUserObject

  Issue(s): #6320

  20
• F9.2.2The 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 using deprecated SolidMechanics methods.

  Specification: corner_nodes_cut/sm:corner_edge_cut

  Design: LineSegmentCutUserObject

  Issue(s): #6320

  20
• F9.2.3The 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 using deprecated SolidMechanics methods.

  Specification: corner_nodes_cut/sm:corner_node_cut

  Design: LineSegmentCutUserObject

  Issue(s): #6320

  20
• F9.2.4The XFEM module shall be capable of propagating an existing crack front along a prescribed cut in 2D deprecated SolidMechanics methods.

  Specification: corner_nodes_cut/sm:notch

  Design: LineSegmentCutUserObject

  Issue(s): #6320

  20
• F9.2.5The XFEM module shall have the capability of cutting directly through multiple nodes of a single QUAD4 element in 2D.

  Specification: corner_nodes_cut:corner_node_cut_twice

  Design: LineSegmentCutUserObject

  Issue(s): #6320

  20
• F9.2.6The 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: corner_nodes_cut:corner_edge_cut

  Design: LineSegmentCutUserObject

  Issue(s): #6320

  20
• F9.2.7The 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: corner_nodes_cut:corner_node_cut

  Design: LineSegmentCutUserObject

  Issue(s): #6320

  20
• F9.2.8The XFEM module shall be capable of propagating an existing crack front along a prescribed cut in 2D.

  Specification: corner_nodes_cut:notch

  Design: LineSegmentCutUserObject

  Issue(s): #6320

  20

• xfem: Crack Tip Enrichment
• F9.3.1The XFEM module shall have the capability to include near-tip enrichment functions in 2D mechanics simulations.

  Specification: crack_tip_enrichment:crack_tip_enrichment_edge_2d

  Design: LineSegmentCutUserObjectCrackTipEnrichmentStressDivergenceTensors

  Issue(s): #10042

  20
• F9.3.2The XFEM module shall have the capability to include near-tip enrichment functions in 3D mechanics simulations.

  Specification: crack_tip_enrichment:crack_tip_enrichment_penny_crack_3d

  Design: CircleCutUserObjectCrackTipEnrichmentStressDivergenceTensors

  Issue(s): #10042

  2

• xfem: Diffusion Xfem
• F9.4.1The 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: diffusion_xfem:diffusion_xfem

  Design: LineSegmentCutUserObject

  Issue(s): #6320

  20
• F9.4.2The 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: diffusion_xfem:diffusion_xfem_flux_bc

  Design: LineSegmentCutUserObject

  Issue(s): #6320

  20
• F9.4.3The 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: diffusion_xfem:levelsetcut2d

  Design: LevelSetCutUserObject !syntax description /UserObjects/LevelSetCutUserObject

  Issue(s): #6320

  20
• F9.4.4The 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: diffusion_xfem:levelsetcut2d_aux

  Design: LevelSetCutUserObject !syntax description /UserObjects/LevelSetCutUserObject

  Issue(s): #6320

  20
• F9.4.5The 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: diffusion_xfem:levelsetcut3d

  Design: LevelSetCutUserObject !syntax description /UserObjects/LevelSetCutUserObject

  Issue(s): #6320

  20

• xfem: Init Solution Propagation
• F9.5.1The 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 using deprecated SolidMechanics methods.

  Specification: init_solution_propagation/sm:init_solution_propagation

  Design: XFEM System

  Issue(s): #8763

  20
• F9.5.2The 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: init_solution_propagation:init_solution_propagation

  Design: XFEM System

  Issue(s): #8763

  20

• xfem: Mechanical Constraint
• F9.6.1The XFEM module shall permit applying a glued constraint across the XFEM interface for 2D solid mechanics problems.

  Specification: mechanical_constraint:glued_penalty

  Design: XFEM System

  Issue(s): #6320

  20

• xfem: Moment Fitting
• F9.7.1The XFEM module shall permit the use of the moment fitting algorithm to compute integration point weights for partial elements on 2D solid mechanics problems using deprecated SolidMechanics methods.

  Specification: moment_fitting/sm:solid_mechanics_moment_fitting

  Design: XFEM System

  Issue(s): #6320

  20
• F9.7.2The 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: moment_fitting:solid_mechanics_moment_fitting

  Design: XFEM System

  Issue(s): #6320

  20
• F9.7.3The XFEM module shall permit the use of the moment fitting algorithm to compute integration point weights for partial elements on 2D problems with a 4-point integration rule

  Specification: moment_fitting:diffusion_moment_fitting_four_points

  Design: XFEM System

  Issue(s): #6320

  20
• F9.7.4The 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: moment_fitting:diffusion_moment_fitting_six_points

  Design: XFEM System

  Issue(s): #6320

  20

• xfem: Moving Interface
• F9.8.1The XFEM module shall provide an ability to specify whether an XFEM cut surface should be healed independently for individual interfaces

  Specification: moving_interface:moving_interface

  Design: LineSegmentCutSetUserObjectLevelSetCutUserObject !syntax description /UserObjects/LevelSetCutUserObject

  Issue(s): #11259

  20
• F9.8.2The XFEM module shall not output summary information on mesh changes when debug_output_level=0

  Specification: moving_interface:moving_interface_debug_output_0

  Design: XFEM System

  Issue(s): #13666

  Prerequisite(s): F9.8.1

  20
• F9.8.3The XFEM module shall output summary information on mesh changes when debug_output_level=1

  Specification: moving_interface:moving_interface_debug_output_1

  Design: XFEM System

  Issue(s): #13666

  Prerequisite(s): F9.8.2

  20
• F9.8.4The XFEM module shall output detailed information on mesh changes when debug_output_level=2

  Specification: moving_interface:moving_interface_debug_output_2

  Design: XFEM System

  Issue(s): #13666

  Prerequisite(s): F9.8.3

  20
• F9.8.5The XFEM module shall output detailed information on mesh changes when debug_output_level=3

  Specification: moving_interface:moving_interface_debug_output_3

  Design: XFEM System

  Issue(s): #13666

  Prerequisite(s): F9.8.4

  20
• F9.8.6The 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: moving_interface:moving_bimaterials

  Design: LevelSetBiMaterialRankTwoLevelSetBiMaterialRankFourXFEMSingleVariableConstraint

  Issue(s): #11259

  20
• F9.8.7The 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: moving_interface:moving_diffusion

  Design: LevelSetBiMaterialRealXFEMEqualValueAtInterfaceLineSegmentLevelSetAuxLevelSetCutUserObject !syntax description /UserObjects/LevelSetCutUserObject

  Issue(s): #11749

  20
• F9.8.8The XFEM module shall provide an ability to solve a 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.

  Specification: moving_interface:phase_transition

  Design: LevelSetBiMaterialRealXFEMEqualValueAtInterfaceLineSegmentLevelSetAuxXFEMPhaseTransitionMovingInterfaceVelocityPointValueAtXFEMInterfaceMovingLineSegmentCutSetUserObject

  Issue(s): #11749

  20
• F9.8.9The 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: moving_interface/verification:1D_xy_homog1mat

  Design: LevelSetCutUserObject !syntax description /UserObjects/LevelSetCutUserObject

  Issue(s): #12833

  20
• F9.8.10The 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: moving_interface/verification:1D_xy_lsdep1mat

  Design: LevelSetCutUserObject !syntax description /UserObjects/LevelSetCutUserObject

  Issue(s): #12833

  20
• F9.8.11The 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: moving_interface/verification:1D_xy_discrete2mat

  Design: LevelSetCutUserObject !syntax description /UserObjects/LevelSetCutUserObjectXFEMSingleVariableConstraint

  Issue(s): #13756

  20
• F9.8.12The 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: moving_interface/verification:1D_rz_homog1mat

  Design: LevelSetCutUserObject !syntax description /UserObjects/LevelSetCutUserObject

  Issue(s): #12833

  20
• F9.8.13The 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: moving_interface/verification:1D_rz_lsdep1mat

  Design: LevelSetCutUserObject !syntax description /UserObjects/LevelSetCutUserObject

  Issue(s): #12833

  20
• F9.8.14The 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: moving_interface/verification:2D_xy_homog1mat

  Design: LevelSetCutUserObject !syntax description /UserObjects/LevelSetCutUserObject

  Issue(s): #12833

  20
• F9.8.15The 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: moving_interface/verification:2D_xy_lsdep1mat

  Design: LevelSetCutUserObject !syntax description /UserObjects/LevelSetCutUserObject

  Issue(s): #12833

  20
• F9.8.16The 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: moving_interface/verification:2D_rz_homog1mat

  Design: LevelSetCutUserObject !syntax description /UserObjects/LevelSetCutUserObject

  Issue(s): #12833

  20
• F9.8.17The 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: moving_interface/verification:2D_rz_lsdep1mat

  Design: LevelSetCutUserObject !syntax description /UserObjects/LevelSetCutUserObject

  Issue(s): #12833

  20

• xfem: Pressure Bc
• F9.9.1The XFEM module shall permit application of pressure boundary conditions to XFEM cut surfaces in 2D using deprecated SolidMechanics methods.

  Specification: pressure_bc/sm:edge_2d_pressure

  Design: XFEMPressure

  Issue(s): #6320

  20
• F9.9.2The XFEM module shall permit application of pressure boundary conditions to XFEM cut surfaces in 3D using deprecated SolidMechanics methods.

  Specification: pressure_bc/sm:edge_3d_pressure

  Design: XFEMPressure

  Issue(s): #6320

  20
• F9.9.3The XFEM module shall permit application of pressure boundary conditions to inclined XFEM cut surfaces in 2D using deprecated SolidMechanics methods.

  Specification: pressure_bc/sm:inclined_edge_2d_pressure

  Design: XFEMPressure

  Issue(s): #6320

  20
• F9.9.4The XFEM module shall permit application of pressure boundary conditions to XFEM cut surfaces in 2D finite deformation simulations using deprecated SolidMechanics methods.

  Specification: pressure_bc/sm:2d_pressure_displaced_mesh

  Design: XFEMPressure

  Issue(s): #6320

  20
• F9.9.5The XFEM module shall permit application of pressure boundary conditions to XFEM cut surfaces in 2D

  Specification: pressure_bc:edge_2d_pressure

  Design: XFEMPressure

  Issue(s): #6320

  20
• F9.9.6The XFEM module shall permit application of pressure boundary conditions to XFEM cut surfaces in 3D

  Specification: pressure_bc:edge_3d_pressure

  Design: XFEMPressure

  Issue(s): #6320

  20
• F9.9.7The XFEM module shall permit application of pressure boundary conditions to inclined XFEM cut surfaces in 2D

  Specification: pressure_bc:inclined_edge_2d_pressure

  Design: XFEMPressure

  Issue(s): #6320

  20
• F9.9.8The XFEM module shall permit application of pressure boundary conditions to XFEM cut surfaces in 2D finite deformation simulations

  Specification: pressure_bc:2d_pressure_displaced_mesh

  Design: XFEMPressure

  Issue(s): #6320

  20

• xfem: Second Order Elements
• F9.10.1The XFEM module shall permit modeling of branching of discontinuities represented with XFEM by sequentially cutting second-order elements in 2D using QUAD8 elements using deprecated SolidMechanics methods.

  Specification: second_order_elements/sm:square_branch_quad8_2d

  Design: XFEM System

  Issue(s): #8709

  20
• F9.10.2The XFEM module shall permit modeling of branching of discontinuities represented with XFEM by sequentially cutting second-order elements in 2D using QUAD9 elements using deprecated SolidMechanics methods.

  Specification: second_order_elements/sm:square_branch_quad9_2d

  Design: XFEM System

  Issue(s): #8709

  20
• F9.10.3The XFEM module shall permit modeling of branching of discontinuities represented with XFEM by sequentially cutting second-order elements in 2D using TRI6 elements using deprecated SolidMechanics methods.

  Specification: second_order_elements/sm:square_branch_tri6_2d

  Design: XFEM System

  Issue(s): #8709

  20
• F9.10.4The XFEM module shall permit modeling of discontinuities represented with XFEM with second-order elements in 2D using TRI6 elements.

  Specification: second_order_elements:diffusion_2d_tri6

  Design: XFEM System

  Issue(s): #8709

  20
• F9.10.5The XFEM module shall permit modeling of discontinuities represented with XFEM with second-order elements in 2D using QUAD8 elements.

  Specification: second_order_elements:diffusion_2d_quad8

  Design: XFEM System

  Issue(s): #8709

  20
• F9.10.6The XFEM module shall permit modeling of discontinuities represented with XFEM with second-order elements in 2D using QUAD9 elements.

  Specification: second_order_elements:diffusion_2d_quad9

  Design: XFEM System

  Issue(s): #8709

  20
• F9.10.7The 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: second_order_elements:diffusion_quad9_levelsetcut

  Design: XFEM System

  Issue(s): #8709

  20
• F9.10.8The 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: second_order_elements:diffusion_3d_tet10

  Design: XFEM System

  Issue(s): #8709

  20
• F9.10.9The 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: second_order_elements:diffusion_3d_hex20

  Design: XFEM System

  Issue(s): #8709

  20
• F9.10.10The 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: second_order_elements:diffusion_3d_hex27

  Design: XFEM System

  Issue(s): #8709

  20
• F9.10.11The XFEM module shall permit modeling of branching of discontinuities represented with XFEM by sequentially cutting second-order elements in 2D using QUAD8 elements.

  Specification: second_order_elements:square_branch_quad8_2d

  Design: XFEM System

  Issue(s): #8709

  20
• F9.10.12The XFEM module shall permit modeling of branching of discontinuities represented with XFEM by sequentially cutting second-order elements in 2D using QUAD9 elements.

  Specification: second_order_elements:square_branch_quad9_2d

  Design: XFEM System

  Issue(s): #8709

  20
• F9.10.13The XFEM module shall permit modeling of branching of discontinuities represented with XFEM by sequentially cutting second-order elements in 2D using TRI6 elements.

  Specification: second_order_elements:square_branch_tri6_2d

  Design: XFEM System

  Issue(s): #8709

  20

• xfem: Side Integral
• F9.11.1The XFEM module shall properly integrate quantities on sides of cut elements that are intersected by the cutting plane in 2D

  Specification: side_integral:side_integral_xfem

  Design: XFEM System

  Issue(s): #6320

  20
• F9.11.2The XFEM module shall properly integrate quantities on sides of cut elements that are intersected by the cutting plane in 3D

  Specification: side_integral:side_integral_3d_xfem

  Design: XFEM System

  Issue(s): #6320

  20

• xfem: Single Var Constraint 2D
• F9.12.1The XFEM module shall provide an ability to apply a zero-jump, zero-flux-jump constraint across a propagating XFEM interface for one variable.

  Specification: single_var_constraint_2d:propagating_1field

  Design: XFEMSingleVariableConstraint

  Issue(s): #6572

  20
• F9.12.2The 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: single_var_constraint_2d:propagating_2field_1constraint

  Design: XFEMSingleVariableConstraint

  Issue(s): #6572

  20
• F9.12.3The XFEM module shall provide an ability to apply zero-jump, zero-flux-jump constraints across a propagating XFEM interface for two variables.

  Specification: single_var_constraint_2d:propagating_2field_2constraint

  Design: XFEMSingleVariableConstraint

  Issue(s): #6572

  20
• F9.12.4The XFEM module shall provide an ability to apply a zero-jump, zero-flux-jump constraint on a stationary interface for one variable.

  Specification: single_var_constraint_2d:stationary_equal

  Design: XFEMSingleVariableConstraint

  Issue(s): #6572

  20
• F9.12.5The 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: single_var_constraint_2d:stationary_fluxjump

  Design: XFEMSingleVariableConstraint

  Issue(s): #6572

  20
• F9.12.6The 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: single_var_constraint_2d:stationary_fluxjump_func

  Design: XFEMSingleVariableConstraint

  Issue(s): #13756

  20
• F9.12.7The 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: single_var_constraint_2d:stationary_jump

  Design: XFEMSingleVariableConstraint

  Issue(s): #6572

  20
• F9.12.8The 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: single_var_constraint_2d:stationary_jump_func

  Design: XFEMSingleVariableConstraint

  Issue(s): #13756

  20
• F9.12.9The XFEM module shall provide an ability to apply a nonzero-jump, nonzero-flux-jump constraint on a stationary interface for one variable.

  Specification: single_var_constraint_2d:stationary_jump_fluxjump

  Design: XFEMSingleVariableConstraint

  Issue(s): #6572

  20
• F9.12.10The XFEM module shall provide an ability to apply a two-sided equal value constraint on a stationary interface for one variable.

  Specification: single_var_constraint_2d:equal_value

  Design: XFEMEqualValueAtInterface

  Issue(s): #11750

  20

• xfem: Single Var Constraint 3D
• F9.13.1The 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: single_var_constraint_3d:stationary_equal_3d

  Design: XFEMSingleVariableConstraint

  Issue(s): #6572

  20
• F9.13.2The 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: single_var_constraint_3d:stationary_fluxjump_3d

  Design: XFEMSingleVariableConstraint

  Issue(s): #6572

  20
• F9.13.3The 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: single_var_constraint_3d:stationary_jump_3d

  Design: XFEMSingleVariableConstraint

  Issue(s): #6572

  20
• F9.13.4The 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: single_var_constraint_3d:stationary_jump_fluxjump_3d

  Design: XFEMSingleVariableConstraint

  Issue(s): #6572

  20

• xfem: Solid Mechanics Basic
• F9.14.1The 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 using the deprecated SolidMechanics system.

  Specification: solid_mechanics_basic/sm:crack_propagation_ave

  Design: XFEMRankTwoTensorMarkerUserObject

  Issue(s): #6320

  20
• F9.14.2The 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 using the deprecated SolidMechanics system.

  Specification: solid_mechanics_basic/sm:edge_crack_3d

  Design: RectangleCutUserObject

  Issue(s): #6320

  20
• F9.14.3The 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 MeshCut3DUserObject using the deprecated SolidMechanics system.

  Specification: solid_mechanics_basic/sm:edge_crack_3d_propagation

  Design: MeshCut3DUserObject

  Issue(s): #6320

  20
• F9.14.4The 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 using the deprecated SolidMechanics system.

  Specification: solid_mechanics_basic/sm:elliptical_crack

  Design: EllipseCutUserObject

  Issue(s): #6320

  20
• F9.14.5MeshCut3DUserObject shall increase the size of the XFEM cutting surface that it defines for a stationary crack in a 3D model at any point in time by adding additional elements around the periphery of the cutting mesh over time using the deprecated SolidMechanics system.

  Specification: solid_mechanics_basic/sm:mesh_grow

  Design: MeshCut3DUserObject

  Issue(s): #6320

  20
• F9.14.6The 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 using the deprecated SolidMechanics system.

  Specification: solid_mechanics_basic/sm:penny_crack

  Design: DomainIntegral SystemCircleCutUserObject

  Issue(s): #6320

  20
• F9.14.7The 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 using the deprecated SolidMechanics system.

  Specification: solid_mechanics_basic/sm:penny_crack_cfp

  Design: DomainIntegral SystemCircleCutUserObject

  Issue(s): #6320

  20
• F9.14.8The 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 using the deprecated SolidMechanics system.

  Specification: solid_mechanics_basic/sm:square_branch_quad_2d

  Design: XFEM System

  Issue(s): #6320

  20
• F9.14.9The 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 using the deprecated SolidMechanics system.

  Specification: solid_mechanics_basic/sm:square_branch_tri_2d

  Design: XFEM System

  Issue(s): #6320

  20
• F9.14.10The 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: solid_mechanics_basic:crack_propagation_ave

  Design: XFEMRankTwoTensorMarkerUserObject

  Issue(s): #6320

  20
• F9.14.11The 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: solid_mechanics_basic:crack_propagation_var

  Design: XFEMRankTwoTensorMarkerUserObject

  Issue(s): #6320

  Prerequisite(s): F9.14.10

  20
• F9.14.12The 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: solid_mechanics_basic:crack_propagation_single_point

  Design: XFEMRankTwoTensorMarkerUserObject

  Issue(s): #6320

  20
• F9.14.13The 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: solid_mechanics_basic:edge_crack_3d

  Design: RectangleCutUserObject

  Issue(s): #6320

  20
• F9.14.14The 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 MeshCut3DUserObject

  Specification: solid_mechanics_basic:edge_crack_3d_propagation

  Design: MeshCut3DUserObject

  Issue(s): #6320

  20
• F9.14.15The 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: solid_mechanics_basic:elliptical_crack

  Design: EllipseCutUserObject

  Issue(s): #6320

  20
• F9.14.16MeshCut3DUserObject shall increase the size of the XFEM cutting surface that it defines for a stationary crack in a 3D model at any point in time by adding additional elements around the periphery of the cutting mesh over time

  Specification: solid_mechanics_basic:mesh_grow

  Design: MeshCut3DUserObject

  Issue(s): #6320

  20
• F9.14.17The 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: solid_mechanics_basic:penny_crack

  Design: DomainIntegral SystemCircleCutUserObject

  Issue(s): #6320

  20
• F9.14.18The 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: solid_mechanics_basic:penny_crack_cfp

  Design: DomainIntegral SystemCircleCutUserObject

  Issue(s): #6320

  20
• F9.14.19The 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: solid_mechanics_basic:square_branch_quad_2d

  Design: XFEM System

  Issue(s): #6320

  20
• F9.14.20The 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: solid_mechanics_basic:square_branch_tri_2d

  Design: XFEM System

  Issue(s): #6320

  20
• F9.14.21The XFEM system shall provide an accessor function to the crack_tip_origin_direction_map

  Specification: solid_mechanics_basic:test_crack_counter

  Design: XFEM System

  Issue(s): #6320

  20

[./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'
[../]

[./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 using deprecated SolidMechanics methods.'
  design = 'LineSegmentCutUserObject.md'
  issues = '#6320'
  no_error_deprecated = true
[../]

[./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 using deprecated SolidMechanics methods.'
  design = 'LineSegmentCutUserObject.md'
  issues = '#6320'
  no_error_deprecated = true
[../]

[./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 using deprecated SolidMechanics methods.'
  design = 'LineSegmentCutUserObject.md'
  issues = '#6320'
  no_error_deprecated = true
[../]

[./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 deprecated SolidMechanics methods.'
  design = 'LineSegmentCutUserObject.md'
  issues = '#6320'
  no_error_deprecated = true
[../]

[./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
  rel_err = 5e-3
  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 using deprecated SolidMechanics methods.'
  design = 'XFEM/index.md'
  issues = '#8763'
  no_error_deprecated = true
[../]

[./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 using deprecated SolidMechanics methods.'
  no_error_deprecated = true
[../]

[./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'
[../]

[./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 LineSegmentLevelSetAux.md LevelSetCutUserObject.md'
  issues = '#11749'
[../]

[./phase_transition]
  type = Exodiff
  input = phase_transition.i
  exodiff = 'phase_transition_out.e  phase_transition_out.e-s002  phase_transition_out.e-s003  phase_transition_out.e-s004'
  map = false
  unique_id = true
  abs_zero = 1e-8
  requirement = 'The XFEM module shall provide an ability to solve a 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.'
  design = 'LevelSetBiMaterialReal.md XFEMEqualValueAtInterface.md LineSegmentLevelSetAux.md XFEMPhaseTransitionMovingInterfaceVelocity.md PointValueAtXFEMInterface.md MovingLineSegmentCutSetUserObject.md'
  issues = '#11749'
[../]

[./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 using deprecated SolidMechanics methods.'
  no_error_deprecated = true
[../]

[./edge_3d_pressure]
  type = Exodiff
  input = edge_3d_pressure.i
  exodiff = 'edge_3d_pressure_out.e'
  rel_err = 1e-3
  map = false
  unique_id = true
  requirement = 'The XFEM module shall permit application of pressure boundary conditions to XFEM cut surfaces in 3D using deprecated SolidMechanics methods.'
  no_error_deprecated = true
[../]

[./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 using deprecated SolidMechanics methods.'
  no_error_deprecated = true
[../]

[./2d_pressure_displaced_mesh]
  type = Exodiff
  input = 2d_pressure_displaced_mesh.i
  exodiff = '2d_pressure_displaced_mesh_out.e'
  rel_err = 1e-3
  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 using deprecated SolidMechanics methods.'
  no_error_deprecated = true
[../]

[./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'
[../]

[./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 using deprecated SolidMechanics methods.'
  no_error_deprecated = true
[../]

[./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 using deprecated SolidMechanics methods.'
  no_error_deprecated = true
[../]

[./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 using deprecated SolidMechanics methods.'
  no_error_deprecated = true
[../]

[./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 = 5e-6
  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 using the deprecated SolidMechanics system.'
  design = 'XFEMRankTwoTensorMarkerUserObject.md'
  no_error_deprecated = true
[../]

[./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 using the deprecated SolidMechanics system.'
  design = 'RectangleCutUserObject.md'
  no_error_deprecated = true
[../]

[./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 edge_crack_3d_propagation_out.e-s003'
  abs_zero = 5e-6
  rel_err = 1e-3
  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 MeshCut3DUserObject using the deprecated SolidMechanics system.'
  design = 'MeshCut3DUserObject.md'
  no_error_deprecated = true
[../]

[./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 using the deprecated SolidMechanics system.'
  design = 'EllipseCutUserObject.md'
  no_error_deprecated = true
[../]

[./mesh_grow]
  type = Exodiff
  input = mesh_grow.i
  exodiff = 'mesh_grow.e'
  abs_zero = 1e-8
  map = false
  # XFEM requires --enable-unique-ids in libmesh
  unique_id = true
  requirement = 'MeshCut3DUserObject shall increase the size of the XFEM cutting surface that it defines for a stationary crack in a 3D model at any point in time by adding additional elements around the periphery of the cutting mesh over time using the deprecated SolidMechanics system.'
  design = 'MeshCut3DUserObject.md'
  no_error_deprecated = true
[../]

[./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 using the deprecated SolidMechanics system.'
  design = 'DomainIntegral/index.md CircleCutUserObject.md'
  no_error_deprecated = true
[../]

[./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 using the deprecated SolidMechanics system.'
  design = 'DomainIntegral/index.md CircleCutUserObject.md'
  no_error_deprecated = true
[../]

[./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 using the deprecated SolidMechanics system.'
  no_error_deprecated = true
[../]

[./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 using the deprecated SolidMechanics system.'
  no_error_deprecated = true
[../]

[./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_propagation]
  type = Exodiff
  input = edge_crack_3d_propagation.i
  exodiff = 'edge_crack_3d_propagation_out.e edge_crack_3d_propagation_out.e-s002 edge_crack_3d_propagation_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 MeshCut3DUserObject'
  design = 'MeshCut3DUserObject.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'
[../]

[./mesh_grow]
  type = Exodiff
  input = mesh_grow.i
  exodiff = 'mesh_grow.e'
  abs_zero = 1e-8
  map = false
  # XFEM requires --enable-unique-ids in libmesh
  unique_id = true
  requirement = 'MeshCut3DUserObject shall increase the size of the XFEM cutting surface that it defines for a stationary crack in a 3D model at any point in time by adding additional elements around the periphery of the cutting mesh over time'
  design = 'MeshCut3DUserObject.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
[../]