# ElasticEnergyMaterial

Free energy material for the elastic energy contributions.

This material generates an elastic free energy contribution consistent with the TensorMechanics stress divergence kernels. This allows for proper coupling of the phase field problem and the mechanics problem. The contribution of the ElasticEnergyMaterial and the chemical free energy (possibly defined using a DerivativeParsedMaterial) are then summed up using a DerivativeSumMaterial to form a _total free energy_ which is passed to the phase field kernels.

The ElasticEnergyMaterial applies a _linear_ elasticity model. It couples in the strain and the elasticity tensor to compute the elstic energy

E= \frac12 C_{ijkl} \epsilon_{ij} \epsilon_{kl}

The material utilizes the derivatives of and to provide the derivatives of , which are required by the phase field equations.


[Materials]
  # material subblocks that define stress and elasticity tensor properties
  # (and necessary derivatives) are omitted

  [./elasticenergy]
    type = ElasticEnergyMaterial
    args = 'c'
  [../]
[]

Input Parameters

  • argsArguments of F() - use vector coupling

    C++ Type:std::vector

    Description:Arguments of F() - use vector coupling

Required Parameters

  • computeTrueWhen false, MOOSE will not call compute methods on this material. The user must call computeProperties() after retrieving the Material via MaterialPropertyInterface::getMaterial(). Non-computed Materials are not sorted for dependencies.

    Default:True

    C++ Type:bool

    Description:When false, MOOSE will not call compute methods on this material. The user must call computeProperties() after retrieving the Material via MaterialPropertyInterface::getMaterial(). Non-computed Materials are not sorted for dependencies.

  • base_nameMaterial property base name

    C++ Type:std::string

    Description:Material property base name

  • displacement_gradientsVector of displacement gradient variables (see Modules/PhaseField/DisplacementGradients action)

    C++ Type:std::vector

    Description:Vector of displacement gradient variables (see Modules/PhaseField/DisplacementGradients action)

  • f_nameFBase name of the free energy function (used to name the material properties)

    Default:F

    C++ Type:std::string

    Description:Base name of the free energy function (used to name the material properties)

  • derivative_order3Maximum order of derivatives taken (2 or 3)

    Default:3

    C++ Type:unsigned int

    Description:Maximum order of derivatives taken (2 or 3)

  • boundaryThe list of boundary IDs from the mesh where this boundary condition applies

    C++ Type:std::vector

    Description:The list of boundary IDs from the mesh where this boundary condition applies

  • blockThe list of block ids (SubdomainID) that this object will be applied

    C++ Type:std::vector

    Description:The list of block ids (SubdomainID) that this object will be applied

Optional Parameters

  • enableTrueSet the enabled status of the MooseObject.

    Default:True

    C++ Type:bool

    Description:Set the enabled status of the MooseObject.

  • use_displaced_meshFalseWhether or not this object should use the displaced mesh for computation. Note that in the case this is true but no displacements are provided in the Mesh block the undisplaced mesh will still be used.

    Default:False

    C++ Type:bool

    Description:Whether or not this object should use the displaced mesh for computation. Note that in the case this is true but no displacements are provided in the Mesh block the undisplaced mesh will still be used.

  • control_tagsAdds user-defined labels for accessing object parameters via control logic.

    C++ Type:std::vector

    Description:Adds user-defined labels for accessing object parameters via control logic.

  • seed0The seed for the master random number generator

    Default:0

    C++ Type:unsigned int

    Description:The seed for the master random number generator

  • implicitTrueDetermines whether this object is calculated using an implicit or explicit form

    Default:True

    C++ Type:bool

    Description:Determines whether this object is calculated using an implicit or explicit form

  • constant_onNONEWhen ELEMENT, MOOSE will only call computeQpProperties() for the 0th quadrature point, and then copy that value to the other qps.When SUBDOMAIN, MOOSE will only call computeSubdomainProperties() for the 0th quadrature point, and then copy that value to the other qps. Evaluations on element qps will be skipped

    Default:NONE

    C++ Type:MooseEnum

    Description:When ELEMENT, MOOSE will only call computeQpProperties() for the 0th quadrature point, and then copy that value to the other qps.When SUBDOMAIN, MOOSE will only call computeSubdomainProperties() for the 0th quadrature point, and then copy that value to the other qps. Evaluations on element qps will be skipped

Advanced Parameters

  • output_propertiesList of material properties, from this material, to output (outputs must also be defined to an output type)

    C++ Type:std::vector

    Description:List of material properties, from this material, to output (outputs must also be defined to an output type)

  • outputsnone Vector of output names were you would like to restrict the output of variables(s) associated with this object

    Default:none

    C++ Type:std::vector

    Description:Vector of output names were you would like to restrict the output of variables(s) associated with this object

Outputs Parameters