Scalar Material Damage

Scalar damage model for which the damage is prescribed by another material

Description

ScalarMaterialDamage is a model to define the effect of damage on the stress and stiffness in a continuum damage mechanics setting. It does not directly compute the stress, but must be used in conjunction with ComputeDamageStress.

This model is a scalar damage model that does not compute the evolution of damage by itself, but relies on another material model to supply a scalar damage index, which can vary between 0 (undamaged) and 1 (fully damaged). This model is mostly intended for use in testing the continuum damage mecahnics system, but could be used for modeling physical behavior if that were included in the model supplying the damage index.

Input Parameters

  • damage_indexName of the material property containing the damage index, which goes from 0 (undamaged) to 1 (fully damaged)

    C++ Type:MaterialPropertyName

    Controllable:No

    Description:Name of the material property containing the damage index, which goes from 0 (undamaged) to 1 (fully damaged)

Required Parameters

  • base_nameOptional parameter that allows the user to define multiple mechanics material systems on the same block, i.e. for multiple phases

    C++ Type:std::string

    Controllable:No

    Description:Optional parameter that allows the user to define multiple mechanics material systems on the same block, i.e. for multiple phases

  • blockThe list of blocks (ids or names) that this object will be applied

    C++ Type:std::vector<SubdomainName>

    Controllable:No

    Description:The list of blocks (ids or names) that this object will be applied

  • boundaryThe list of boundaries (ids or names) from the mesh where this object applies

    C++ Type:std::vector<BoundaryName>

    Controllable:No

    Description:The list of boundaries (ids or names) from the mesh where this object applies

  • 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 computeQpProperties() 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

    Options:NONE, ELEMENT, SUBDOMAIN

    Controllable:No

    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 computeQpProperties() for the 0th quadrature point, and then copy that value to the other qps. Evaluations on element qps will be skipped

  • damage_index_namedamage_indexname of the material property where the damage index is stored

    Default:damage_index

    C++ Type:MaterialPropertyName

    Controllable:No

    Description:name of the material property where the damage index is stored

  • declare_suffixAn optional suffix parameter that can be appended to any declared properties. The suffix will be prepended with a '_' character.

    C++ Type:MaterialPropertyName

    Controllable:No

    Description:An optional suffix parameter that can be appended to any declared properties. The suffix will be prepended with a '_' character.

  • maximum_damage1Maximum value allowed for damage index

    Default:1

    C++ Type:double

    Controllable:No

    Description:Maximum value allowed for damage index

  • maximum_damage_increment0.1maximum damage increment allowed for simulations with adaptive time step

    Default:0.1

    C++ Type:double

    Controllable:No

    Description:maximum damage increment allowed for simulations with adaptive time step

  • prop_getter_suffixAn optional suffix parameter that can be appended to any attempt to retrieve/get material properties. The suffix will be prepended with a '_' character.

    C++ Type:MaterialPropertyName

    Controllable:No

    Description:An optional suffix parameter that can be appended to any attempt to retrieve/get material properties. The suffix will be prepended with a '_' character.

  • residual_stiffness_fraction1e-08Minimum fraction of original material stiffness retained for fully damaged material (when damage_index=1)

    Default:1e-08

    C++ Type:double

    Controllable:No

    Description:Minimum fraction of original material stiffness retained for fully damaged material (when damage_index=1)

  • use_old_damageFalseWhether to use the damage index from the previous step in the stress computation

    Default:False

    C++ Type:bool

    Controllable:No

    Description:Whether to use the damage index from the previous step in the stress computation

Optional Parameters

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

    C++ Type:std::vector<std::string>

    Controllable:No

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

  • enableTrueSet the enabled status of the MooseObject.

    Default:True

    C++ Type:bool

    Controllable:Yes

    Description:Set the enabled status of the MooseObject.

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

    Default:True

    C++ Type:bool

    Controllable:No

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

  • seed0The seed for the master random number generator

    Default:0

    C++ Type:unsigned int

    Controllable:No

    Description:The seed for the master random number generator

  • 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

    Controllable:No

    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.

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<std::string>

    Controllable:No

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

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

    Default:none

    C++ Type:std::vector<OutputName>

    Controllable:No

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

Outputs Parameters

References

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