Legacy Kernel-Only Tensor Mechanics Action

Set up stress divergence kernels with coordinate system aware logic

warning:Deprecated Action

This legacy action will soon be deprecated in favor of the more inclusive TensorMechanics/MasterAction. See the description, example use, and parameters on the TensorMechanics/Master action system page.

Description

The LegacyTensorMechanicsAction is a convenience object that simplifies part of the tensor mechanics system setup. It adds StressDivergence Kernels (for the current coordinate system).

Constructed MooseObjects

The Legacy Tensor Mechanics Action is used to construct the kernels for the specified coordinate system.

Table 1: Correspondence Among Action Functionality and MooseObjects for the Tensor Mechanics Master Action

Functionality	Replaced Classes	Associated Parameters
Calculate stress divergence equilibrium for the given coordinate system	StressDivergenceTensors or StressDivergenceRZTensors or StressDivergenceRSphericalTensors	`displacements` : a string of the displacement field variables

Note that there are many variations for the calculation of the stress divergence. Review the theoretical introduction for the Stress Divergence. Pay particular attention to the setting of the use_displaced_mesh parameter discussion; this parameter depends on the strain formulation used in the simulation.

note:Use of the Tensor Mechanics MasterAction Recommended

We recommend that users employ the TensorMechanics/MasterAction whenever possible to ensure consistency between the test function gradients and the strain formulation selected.

Example Input File Syntax

[Kernels]
  [./TensorMechanics]
    use_displaced_mesh = true
  [../]
[]

Input Parameters

displacementsThe nonlinear displacement variables for the problem
C++ Type:std::vector<VariableName>
Options:
Description:The nonlinear displacement variables for the problem

Required Parameters

active__all__ If specified only the blocks named will be visited and made active
Default:__all__
C++ Type:std::vector<std::string>
Options:
Description:If specified only the blocks named will be visited and made active
add_variablesFalseAdd the displacement variables
Default:False
C++ Type:bool
Options:
Description:Add the displacement variables
automatic_eigenstrain_namesFalseCollects all material eigenstrains and passes to required strain calculator within TMA internally.
Default:False
C++ Type:bool
Options:
Description:Collects all material eigenstrains and passes to required strain calculator within TMA internally.
base_nameMaterial property base name
C++ Type:std::string
Options:
Description:Material property base name
cylindrical_axis_point1Starting point for direction of axis of rotation for cylindrical stress/strain.
C++ Type:libMesh::Point
Options:
Description:Starting point for direction of axis of rotation for cylindrical stress/strain.
cylindrical_axis_point2Ending point for direction of axis of rotation for cylindrical stress/strain.
C++ Type:libMesh::Point
Options:
Description:Ending point for direction of axis of rotation for cylindrical stress/strain.
decomposition_methodTaylorExpansionMethods to calculate the finite strain and rotation increments
Default:TaylorExpansion
C++ Type:MooseEnum
Options:TaylorExpansion, EigenSolution
Description:Methods to calculate the finite strain and rotation increments
directionDirection stress/strain is calculated in
C++ Type:libMesh::Point
Options:
Description:Direction stress/strain is calculated in
eigenstrain_namesList of eigenstrains to be applied in this strain calculation
C++ Type:std::vector<MaterialPropertyName>
Options:
Description:List of eigenstrains to be applied in this strain calculation
extra_vector_tagsThe tag names for extra vectors that residual data should be saved into
C++ Type:std::vector<TagName>
Options:
Description:The tag names for extra vectors that residual data should be saved into
global_strainName of the global strain material to be applied in this strain calculation. The global strain tensor is constant over the whole domain and allows visualization of the deformed shape with the periodic BC
C++ Type:MaterialPropertyName
Options:
Description:Name of the global strain material to be applied in this strain calculation. The global strain tensor is constant over the whole domain and allows visualization of the deformed shape with the periodic BC
inactiveIf specified blocks matching these identifiers will be skipped.
C++ Type:std::vector<std::string>
Options:
Description:If specified blocks matching these identifiers will be skipped.
incrementalFalseUse incremental or total strain
Default:False
C++ Type:bool
Options:
Description:Use incremental or total strain
scalingThe scaling to apply to the displacement variables
C++ Type:double
Options:
Description:The scaling to apply to the displacement variables
strainSMALLStrain formulation
Default:SMALL
C++ Type:MooseEnum
Options:SMALL, FINITE
Description:Strain formulation
strain_base_nameThe base name used for the strain. If not provided, it will be set equal to base_name
C++ Type:std::string
Options:
Description:The base name used for the strain. If not provided, it will be set equal to base_name
temperatureThe temperature
C++ Type:std::vector<VariableName>
Options:
Description:The temperature
use_automatic_differentiationFalseFlag to use automatic differentiation (AD) objects when possible
Default:False
C++ Type:bool
Options:
Description:Flag to use automatic differentiation (AD) objects when possible
use_displaced_meshFalseWhether to use displaced mesh in the kernels
Default:False
C++ Type:bool
Options:
Description:Whether to use displaced mesh in the kernels
use_finite_deform_jacobianFalseJacobian for corrotational finite strain
Default:False
C++ Type:bool
Options:
Description:Jacobian for corrotational finite strain
verboseFalseDisplay extra information.
Default:False
C++ Type:bool
Options:
Description:Display extra information.
volumetric_locking_correctionFalseFlag to correct volumetric locking
Default:False
C++ Type:bool
Options:
Description:Flag to correct volumetric locking

Optional Parameters

additional_generate_outputAdd scalar quantity output for stress and/or strain (will be appended to the list in `generate_output`)
C++ Type:MultiMooseEnum
Options:creep_strain_xx, creep_strain_xy, creep_strain_xz, creep_strain_yx, creep_strain_yy, creep_strain_yz, creep_strain_zx, creep_strain_zy, creep_strain_zz, creep_stress_xx, creep_stress_xy, creep_stress_xz, creep_stress_yx, creep_stress_yy, creep_stress_yz, creep_stress_zx, creep_stress_zy, creep_stress_zz, elastic_strain_xx, elastic_strain_xy, elastic_strain_xz, elastic_strain_yx, elastic_strain_yy, elastic_strain_yz, elastic_strain_zx, elastic_strain_zy, elastic_strain_zz, mechanical_strain_xx, mechanical_strain_xy, mechanical_strain_xz, mechanical_strain_yx, mechanical_strain_yy, mechanical_strain_yz, mechanical_strain_zx, mechanical_strain_zy, mechanical_strain_zz, plastic_strain_xx, plastic_strain_xy, plastic_strain_xz, plastic_strain_yx, plastic_strain_yy, plastic_strain_yz, plastic_strain_zx, plastic_strain_zy, plastic_strain_zz, strain_xx, strain_xy, strain_xz, strain_yx, strain_yy, strain_yz, strain_zx, strain_zy, strain_zz, stress_xx, stress_xy, stress_xz, stress_yx, stress_yy, stress_yz, stress_zx, stress_zy, stress_zz, effective_plastic_strain, effective_creep_strain, firstinv_stress, firstinv_strain, hydrostatic_stress, intensity_stress, l2norm_mechanical_strain, l2norm_stress, l2norm_strain, l2norm_elastic_strain, l2norm_plastic_strain, l2norm_creep_strain, max_principal_mechanical_strain, max_principal_stress, max_principal_strain, maxshear_stress, mid_principal_mechanical_strain, mid_principal_stress, mid_principal_strain, min_principal_mechanical_strain, min_principal_stress, min_principal_strain, secondinv_stress, secondinv_strain, thirdinv_stress, thirdinv_strain, triaxiality_stress, volumetric_mechanical_strain, volumetric_strain, vonmises_stress, directional_stress, directional_strain, axial_stress, axial_strain, axial_plastic_strain, axial_creep_strain, axial_elastic_strain, hoop_stress, hoop_strain, hoop_plastic_strain, hoop_creep_strain, hoop_elastic_strain, radial_stress, radial_strain
Description:Add scalar quantity output for stress and/or strain (will be appended to the list in `generate_output`)
additional_material_output_familySpecifies the family of FE shape functions to use for this variable.
C++ Type:MultiMooseEnum
Options:MONOMIAL, LAGRANGE
Description:Specifies the family of FE shape functions to use for this variable.
additional_material_output_orderSpecifies the order of the FE shape function to use for this variable.
C++ Type:MultiMooseEnum
Options:CONSTANT, FIRST, SECOND, THIRD, FOURTH, FIFTH, SIXTH, SEVENTH, EIGHTH, NINTH
Description:Specifies the order of the FE shape function to use for this variable.
generate_outputAdd scalar quantity output for stress and/or strain
C++ Type:MultiMooseEnum
Options:creep_strain_xx, creep_strain_xy, creep_strain_xz, creep_strain_yx, creep_strain_yy, creep_strain_yz, creep_strain_zx, creep_strain_zy, creep_strain_zz, creep_stress_xx, creep_stress_xy, creep_stress_xz, creep_stress_yx, creep_stress_yy, creep_stress_yz, creep_stress_zx, creep_stress_zy, creep_stress_zz, elastic_strain_xx, elastic_strain_xy, elastic_strain_xz, elastic_strain_yx, elastic_strain_yy, elastic_strain_yz, elastic_strain_zx, elastic_strain_zy, elastic_strain_zz, mechanical_strain_xx, mechanical_strain_xy, mechanical_strain_xz, mechanical_strain_yx, mechanical_strain_yy, mechanical_strain_yz, mechanical_strain_zx, mechanical_strain_zy, mechanical_strain_zz, plastic_strain_xx, plastic_strain_xy, plastic_strain_xz, plastic_strain_yx, plastic_strain_yy, plastic_strain_yz, plastic_strain_zx, plastic_strain_zy, plastic_strain_zz, strain_xx, strain_xy, strain_xz, strain_yx, strain_yy, strain_yz, strain_zx, strain_zy, strain_zz, stress_xx, stress_xy, stress_xz, stress_yx, stress_yy, stress_yz, stress_zx, stress_zy, stress_zz, effective_plastic_strain, effective_creep_strain, firstinv_stress, firstinv_strain, hydrostatic_stress, intensity_stress, l2norm_mechanical_strain, l2norm_stress, l2norm_strain, l2norm_elastic_strain, l2norm_plastic_strain, l2norm_creep_strain, max_principal_mechanical_strain, max_principal_stress, max_principal_strain, maxshear_stress, mid_principal_mechanical_strain, mid_principal_stress, mid_principal_strain, min_principal_mechanical_strain, min_principal_stress, min_principal_strain, secondinv_stress, secondinv_strain, thirdinv_stress, thirdinv_strain, triaxiality_stress, volumetric_mechanical_strain, volumetric_strain, vonmises_stress, directional_stress, directional_strain, axial_stress, axial_strain, axial_plastic_strain, axial_creep_strain, axial_elastic_strain, hoop_stress, hoop_strain, hoop_plastic_strain, hoop_creep_strain, hoop_elastic_strain, radial_stress, radial_strain
Description:Add scalar quantity output for stress and/or strain
material_output_familySpecifies the family of FE shape functions to use for this variable.
C++ Type:MultiMooseEnum
Options:MONOMIAL, LAGRANGE
Description:Specifies the family of FE shape functions to use for this variable.
material_output_orderSpecifies the order of the FE shape function to use for this variable.
C++ Type:MultiMooseEnum
Options:CONSTANT, FIRST, SECOND, THIRD, FOURTH, FIFTH, SIXTH, SEVENTH, EIGHTH, NINTH
Description:Specifies the order of the FE shape function to use for this variable.

Output Parameters

blockThe list of ids of the blocks (subdomain) that the stress divergence kernels will be applied to
C++ Type:std::vector<SubdomainName>
Options:
Description:The list of ids of the blocks (subdomain) that the stress divergence kernels will be applied to
diag_save_inThe displacement diagonal preconditioner terms
C++ Type:std::vector<AuxVariableName>
Options:
Description:The displacement diagonal preconditioner terms
save_inThe displacement residuals
C++ Type:std::vector<AuxVariableName>
Options:
Description:The displacement residuals

Advanced Parameters

out_of_plane_directionzThe direction of the out-of-plane strain.
Default:z
C++ Type:MooseEnum
Options:x, y, z
Description:The direction of the out-of-plane strain.
out_of_plane_pressure_functionFunction used to prescribe pressure (applied toward the body) in the out-of-plane direction (y for 1D Axisymmetric or z for 2D Cartesian problems)
C++ Type:FunctionName
Options:
Description:Function used to prescribe pressure (applied toward the body) in the out-of-plane direction (y for 1D Axisymmetric or z for 2D Cartesian problems)
out_of_plane_pressure_material0Material used to prescribe pressure (applied toward the body) in the out-of-plane direction
Default:0
C++ Type:MaterialPropertyName
Options:
Description:Material used to prescribe pressure (applied toward the body) in the out-of-plane direction
out_of_plane_strainVariable for the out-of-plane strain for plane stress models
C++ Type:VariableName
Options:
Description:Variable for the out-of-plane strain for plane stress models
planar_formulationNONEOut-of-plane stress/strain formulation
Default:NONE
C++ Type:MooseEnum
Options:NONE, WEAK_PLANE_STRESS, PLANE_STRAIN, GENERALIZED_PLANE_STRAIN
Description:Out-of-plane stress/strain formulation
pressure_factorScale factor applied to prescribed out-of-plane pressure (both material and function)
C++ Type:double
Options:
Description:Scale factor applied to prescribed out-of-plane pressure (both material and function)
scalar_out_of_plane_strainScalar variable for the out-of-plane strain (in y direction for 1D Axisymmetric or in z direction for 2D Cartesian problems)
C++ Type:VariableName
Options:
Description:Scalar variable for the out-of-plane strain (in y direction for 1D Axisymmetric or in z direction for 2D Cartesian problems)

Out-Of-Plane Stress/Strain Parameters

Associated Actions

Available Actions

Tensor Mechanics App
LegacyTensorMechanicsActionSet up stress divergence kernels with coordinate system aware logic

(modules/tensor_mechanics/test/tests/elastic_patch/elastic_patch.i)

# Patch Test

# This test is designed to compute constant xx, yy, zz, xy, yz, and zx
#  stress on a set of irregular hexes.  The mesh is composed of one
#  block with seven elements.  The elements form a unit cube with one
#  internal element.  There is a nodeset for each exterior node.

# The cube is displaced by 1e-6 units in x, 2e-6 in y, and 3e-6 in z.
#  The faces are sheared as well (1e-6, 2e-6, and 3e-6 for xy, yz, and
#  zx).  This gives a uniform strain/stress state for all six unique
#  tensor components.

# With Young's modulus at 1e6 and Poisson's ratio at 0, the shear
#  modulus is 5e5 (G=E/2/(1+nu)).  Therefore,
#
#  stress xx = 1e6 * 1e-6 = 1
#  stress yy = 1e6 * 2e-6 = 2
#  stress zz = 1e6 * 3e-6 = 3
#  stress xy = 2 * 5e5 * 1e-6 / 2 = 0.5
#             (2 * G   * gamma_xy / 2 = 2 * G * epsilon_xy)
#  stress yz = 2 * 5e5 * 2e-6 / 2 = 1
#  stress zx = 2 * 5e5 * 3e-6 / 2 = 1.5

[GlobalParams]
  displacements = 'disp_x disp_y disp_z'
  block = '1 2 3 4 5 6 7'
[]

[Mesh]#Comment
  file = elastic_patch.e
[] # Mesh

[Functions]
  [./rampConstant1]
    type = PiecewiseLinear
    x = '0. 1. 2.'
    y = '0. 1. 1.'
    scale_factor = 1e-6
  [../]
  [./rampConstant2]
    type = PiecewiseLinear
    x = '0. 1. 2.'
    y = '0. 1. 1.'
    scale_factor = 2e-6
  [../]
  [./rampConstant3]
    type = PiecewiseLinear
    x = '0. 1. 2.'
    y = '0. 1. 1.'
    scale_factor = 3e-6
  [../]
  [./rampConstant4]
    type = PiecewiseLinear
    x = '0. 1. 2.'
    y = '0. 1. 1.'
    scale_factor = 4e-6
  [../]
  [./rampConstant6]
    type = PiecewiseLinear
    x = '0. 1. 2.'
    y = '0. 1. 1.'
    scale_factor = 6e-6
  [../]
[] # Functions

[Variables]

  [./disp_x]
    order = FIRST
    family = LAGRANGE
  [../]

  [./disp_y]
    order = FIRST
    family = LAGRANGE
  [../]

  [./disp_z]
    order = FIRST
    family = LAGRANGE
  [../]

[] # Variables

[AuxVariables]

  [./stress_xx]
    order = CONSTANT
    family = MONOMIAL
  [../]
  [./stress_yy]
    order = CONSTANT
    family = MONOMIAL
  [../]
  [./stress_zz]
    order = CONSTANT
    family = MONOMIAL
  [../]
  [./stress_xy]
    order = CONSTANT
    family = MONOMIAL
  [../]
  [./stress_yz]
    order = CONSTANT
    family = MONOMIAL
  [../]
  [./stress_zx]
    order = CONSTANT
    family = MONOMIAL
  [../]
  [./elastic_energy]
    order = CONSTANT
    family = MONOMIAL
  [../]
  [./vonmises]
    order = CONSTANT
    family = MONOMIAL
  [../]
  [./hydrostatic]
    order = CONSTANT
    family = MONOMIAL
  [../]
  [./firstinv]
    order = CONSTANT
    family = MONOMIAL
  [../]
  [./secondinv]
    order = CONSTANT
    family = MONOMIAL
  [../]
  [./thirdinv]
    order = CONSTANT
    family = MONOMIAL
  [../]
  [./maxprincipal]
    order = CONSTANT
    family = MONOMIAL
  [../]
  [./midprincipal]
    order = CONSTANT
    family = MONOMIAL
  [../]
  [./minprincipal]
    order = CONSTANT
    family = MONOMIAL
  [../]
  [./direction]
    order = CONSTANT
    family = MONOMIAL
  [../]
  [./max_shear]
    order = CONSTANT
    family = MONOMIAL
  [../]
  [./sint]
    order = CONSTANT
    family = MONOMIAL
  [../]

[] # AuxVariables

[Kernels]
  [./TensorMechanics]
    use_displaced_mesh = true
  [../]
[]

[AuxKernels]

  [./stress_xx]
    type = RankTwoAux
    rank_two_tensor = stress
    variable = stress_xx
    index_i = 0
    index_j = 0
  [../]
  [./stress_yy]
    type = RankTwoAux
    rank_two_tensor = stress
    variable = stress_yy
    index_i = 1
    index_j = 1
  [../]
  [./stress_zz]
    type = RankTwoAux
    rank_two_tensor = stress
    variable = stress_zz
    index_i = 2
    index_j = 2
  [../]
  [./stress_xy]
    type = RankTwoAux
    rank_two_tensor = stress
    variable = stress_xy
    index_i = 0
    index_j = 1
  [../]
  [./stress_yz]
    type = RankTwoAux
    rank_two_tensor = stress
    variable = stress_yz
    index_i = 1
    index_j = 2
  [../]
  [./stress_zx]
    type = RankTwoAux
    rank_two_tensor = stress
    variable = stress_zx
    index_i = 2
    index_j = 0
  [../]
  [./elastic_energy]
    type = ElasticEnergyAux
    variable = elastic_energy
  [../]
  [./vonmises]
    type = RankTwoScalarAux
    rank_two_tensor = stress
    variable = vonmises
    scalar_type = vonmisesStress
  [../]
  [./hydrostatic]
    type = RankTwoScalarAux
    rank_two_tensor = stress
    variable = hydrostatic
    scalar_type = hydrostatic
  [../]
  [./fi]
    type = RankTwoScalarAux
    rank_two_tensor = stress
    variable = firstinv
    scalar_type = firstinvariant
  [../]
  [./si]
    type = RankTwoScalarAux
    rank_two_tensor = stress
    variable = secondinv
    scalar_type = secondinvariant
  [../]
  [./ti]
    type = RankTwoScalarAux
    rank_two_tensor = stress
    variable = thirdinv
    scalar_type = thirdinvariant
  [../]
  [./maxprincipal]
    type = RankTwoScalarAux
    rank_two_tensor = stress
    variable = maxprincipal
    scalar_type = MaxPRiNCIpAl
  [../]
  [./midprincipal]
    type = RankTwoScalarAux
    rank_two_tensor = stress
    variable = midprincipal
    scalar_type = MidPRiNCIpAl
  [../]
  [./minprincipal]
    type = RankTwoScalarAux
    rank_two_tensor = stress
    variable = minprincipal
    scalar_type = MiNPRiNCIpAl
  [../]
  [./direction]
    type = RankTwoScalarAux
    rank_two_tensor = stress
    variable = direction
    scalar_type = direction
    direction = '1 1 1'
  [../]
  [./max_shear]
    type = RankTwoScalarAux
    rank_two_tensor = stress
    variable = max_shear
    scalar_type = MaxShear
  [../]
  [./sint]
    type = RankTwoScalarAux
    rank_two_tensor = stress
    variable = sint
    scalar_type = StressIntensity
  [../]


[] # AuxKernels

[BCs]

  [./node1_x]
    type = DirichletBC
    variable = disp_x
    boundary = 1
    value = 0.0
  [../]
  [./node1_y]
    type = FunctionDirichletBC
    variable = disp_y
    boundary = 1
    function = rampConstant2
  [../]
  [./node1_z]
    type = FunctionDirichletBC
    variable = disp_z
    boundary = 1
    function = rampConstant3
  [../]

  [./node2_x]
    type = FunctionDirichletBC
    variable = disp_x
    boundary = 2
    function = rampConstant1
  [../]
  [./node2_y]
    type = FunctionDirichletBC
    variable = disp_y
    boundary = 2
    function = rampConstant2
  [../]
  [./node2_z]
    type = FunctionDirichletBC
    variable = disp_z
    boundary = 2
    function = rampConstant6
  [../]

  [./node3_x]
    type = FunctionDirichletBC
    variable = disp_x
    boundary = 3
    function = rampConstant1
  [../]
  [./node3_y]
    type = DirichletBC
    variable = disp_y
    boundary = 3
    value = 0.0
  [../]
  [./node3_z]
    type = FunctionDirichletBC
    variable = disp_z
    boundary = 3
    function = rampConstant3
  [../]

  [./node4_x]
    type = DirichletBC
    variable = disp_x
    boundary = 4
    value = 0.0
  [../]
  [./node4_y]
    type = DirichletBC
    variable = disp_y
    boundary = 4
    value = 0.0
  [../]
  [./node4_z]
    type = DirichletBC
    variable = disp_z
    boundary = 4
    value = 0.0
  [../]

  [./node5_x]
    type = FunctionDirichletBC
    variable = disp_x
    boundary = 5
    function = rampConstant1
  [../]
  [./node5_y]
    type = FunctionDirichletBC
    variable = disp_y
    boundary = 5
    function = rampConstant4
  [../]
  [./node5_z]
    type = FunctionDirichletBC
    variable = disp_z
    boundary = 5
    function = rampConstant3
  [../]

  [./node6_x]
    type = FunctionDirichletBC
    variable = disp_x
    boundary = 6
    function = rampConstant2
  [../]
  [./node6_y]
    type = FunctionDirichletBC
    variable = disp_y
    boundary = 6
    function = rampConstant4
  [../]
  [./node6_z]
    type = FunctionDirichletBC
    variable = disp_z
    boundary = 6
    function = rampConstant6
  [../]

  [./node7_x]
    type = FunctionDirichletBC
    variable = disp_x
    boundary = 7
    function = rampConstant2
  [../]
  [./node7_y]
    type = FunctionDirichletBC
    variable = disp_y
    boundary = 7
    function = rampConstant2
  [../]
  [./node7_z]
    type = FunctionDirichletBC
    variable = disp_z
    boundary = 7
    function = rampConstant3
  [../]

  [./node8_x]
    type = FunctionDirichletBC
    variable = disp_x
    boundary = 8
    function = rampConstant1
  [../]
  [./node8_y]
    type = FunctionDirichletBC
    variable = disp_y
    boundary = 8
    function = rampConstant2
  [../]
  [./node8_z]
    type = DirichletBC
    variable = disp_z
    boundary = 8
    value = 0.0
  [../]


[] # BCs

[Materials]

  [./elasticity_tensor]
    type = ComputeIsotropicElasticityTensor
    youngs_modulus = 1e6
    poissons_ratio = 0.0
  [../]

  [./strain]
    type = ComputeFiniteStrain
  [../]

  [./stress]
    type = ComputeFiniteStrainElasticStress
  [../]

[] # Materials

[Executioner]

  type = Transient

  #Preconditioned JFNK (default)
  solve_type = 'PJFNK'

  nl_abs_tol = 1e-10

  l_max_its = 20

  start_time = 0.0
  dt = 1.0
  num_steps = 2
  end_time = 2.0
[] # Executioner

[Outputs]
  exodus = true
[] # Outputs

Description
Constructed MooseObjects
Example Input File Syntax
Input Parameters
Associated Actions
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