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ComputeLinearViscoelasticStress Class Reference

Computes the stress of a linear viscoelastic material, using total small strains. More...

#include <ComputeLinearViscoelasticStress.h>

Inheritance diagram for ComputeLinearViscoelasticStress:
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Public Member Functions

 ComputeLinearViscoelasticStress (const InputParameters &parameters)
 
virtual void initialSetup ()
 

Protected Member Functions

virtual void initQpStatefulProperties () override
 
virtual void computeQpStress () override
 
virtual void computeQpProperties () override
 
void addQpInitialStress ()
 InitialStress Deprecation: remove this method. More...
 

Protected Attributes

MaterialProperty< RankTwoTensor > & _creep_strain
 Creep strain variable. More...
 
const MaterialProperty< RankTwoTensor > & _creep_strain_old
 
const MaterialProperty< RankTwoTensor > & _apparent_creep_strain
 Apparent creep strain (extracted from a LinearViscoelasticityBase object) More...
 
const MaterialProperty< RankFourTensor > & _apparent_elasticity_tensor
 Apparent elasticity tensor (extracted from a LinearViscoelasticityBase object) More...
 
const MaterialProperty< RankFourTensor > & _instantaneous_elasticity_tensor_inv
 Instantaneous compliance tensor (extracted from a LinearViscoelasticityBase object) More...
 
const MaterialProperty< RankTwoTensor > & _mechanical_strain
 
const std::string _base_name
 
const std::string _elasticity_tensor_name
 
MaterialProperty< RankTwoTensor > & _stress
 
MaterialProperty< RankTwoTensor > & _elastic_strain
 
const MaterialProperty< RankFourTensor > & _elasticity_tensor
 
const MaterialProperty< RankTwoTensor > & _extra_stress
 Extra stress tensor. More...
 
std::vector< Function * > _initial_stress_fcn
 initial stress components More...
 
MaterialProperty< RankFourTensor > & _Jacobian_mult
 derivative of stress w.r.t. strain (_dstress_dstrain) More...
 
const bool _store_stress_old
 Parameter which decides whether to store old stress. This is required for HHT time integration and Rayleigh damping. More...
 
const bool _initial_stress_provided
 Whether initial stress was provided. InitialStress Deprecation: remove this. More...
 
MaterialProperty< RankTwoTensor > * _initial_stress
 Initial stress, if provided. InitialStress Deprecation: remove this. More...
 
const MaterialProperty< RankTwoTensor > * _initial_stress_old
 Old value of initial stress, which is needed to correctly implement finite-strain rotations. InitialStress Deprecation: remove this. More...
 

Detailed Description

Computes the stress of a linear viscoelastic material, using total small strains.

The mechanical strain is decomposed into the elastic strain + the creep strain, the creep strain itself resulting from a spring-dashpot model.

If you need to accomodate other sources of inelastic strains, use a ComputeMultipleInelasticStress material instead, associated with a LinearViscoelasticStressUpdate to represent the creep strain.

Definition at line 28 of file ComputeLinearViscoelasticStress.h.

Constructor & Destructor Documentation

ComputeLinearViscoelasticStress::ComputeLinearViscoelasticStress ( const InputParameters &  parameters)

Definition at line 31 of file ComputeLinearViscoelasticStress.C.

32  : ComputeLinearElasticStress(parameters),
33  _creep_strain(declareProperty<RankTwoTensor>(
34  isParamValid("base_name") ? _base_name + "_creep_strain" : "creep_strain")),
35  _creep_strain_old(getMaterialPropertyOld<RankTwoTensor>(
36  isParamValid("base_name") ? _base_name + "_creep_strain" : "creep_strain")),
37  _apparent_creep_strain(getMaterialProperty<RankTwoTensor>("apparent_creep_strain")),
38  _apparent_elasticity_tensor(getMaterialProperty<RankFourTensor>("apparent_elasticity_tensor")),
40  getMaterialProperty<RankFourTensor>("instantaneous_elasticity_tensor_inv"))
41 {
42 }
const MaterialProperty< RankFourTensor > & _instantaneous_elasticity_tensor_inv
Instantaneous compliance tensor (extracted from a LinearViscoelasticityBase object) ...
const MaterialProperty< RankTwoTensor > & _apparent_creep_strain
Apparent creep strain (extracted from a LinearViscoelasticityBase object)
const MaterialProperty< RankTwoTensor > & _creep_strain_old
ComputeLinearElasticStress(const InputParameters &parameters)
MaterialProperty< RankTwoTensor > & _creep_strain
Creep strain variable.
const std::string _base_name
const MaterialProperty< RankFourTensor > & _apparent_elasticity_tensor
Apparent elasticity tensor (extracted from a LinearViscoelasticityBase object)

Member Function Documentation

void ComputeStressBase::addQpInitialStress ( )
protectedinherited

InitialStress Deprecation: remove this method.

Adds initial stress, if it is provided, to _stress[_qp]. This function should NOT be used if you calculate stress using

stress = stress_old + elasticity * strain_increment

because stress_old will already include initial stress. However this function SHOULD be used if your code uses

stress = elasticity * (elastic_strain_old + strain_increment) or stress = elasticity * elastic_strain

since in these cases the elastic_strain and elastic_strain_old will not include any contribution from initial stress.

Definition at line 112 of file ComputeStressBase.C.

Referenced by ComputeLinearElasticStress::computeQpStress(), ComputeCosseratLinearElasticStress::computeQpStress(), ComputeFiniteStrainElasticStress::computeQpStress(), ComputeSmearedCrackingStress::computeQpStress(), ComputeMultipleInelasticStress::computeQpStressIntermediateConfiguration(), ComputeStressBase::initQpStatefulProperties(), ComputeMultipleInelasticStress::updateQpState(), and ComputeMultipleInelasticStress::updateQpStateSingleModel().

113 {
115  _stress[_qp] += (*_initial_stress)[_qp];
116 }
MaterialProperty< RankTwoTensor > & _stress
const bool _initial_stress_provided
Whether initial stress was provided. InitialStress Deprecation: remove this.
void ComputeStressBase::computeQpProperties ( )
overrideprotectedvirtualinherited

Reimplemented in ComputeBirchMurnaghanEquationOfStress, and ComputeStressEosBase.

Definition at line 99 of file ComputeStressBase.C.

100 {
101  // InitialStress Deprecation: remove the following 2 lines
103  (*_initial_stress)[_qp] = (*_initial_stress_old)[_qp];
104 
105  computeQpStress();
106 
107  // Add in extra stress
108  _stress[_qp] += _extra_stress[_qp];
109 }
virtual void computeQpStress()=0
MaterialProperty< RankTwoTensor > & _stress
const bool _initial_stress_provided
Whether initial stress was provided. InitialStress Deprecation: remove this.
const MaterialProperty< RankTwoTensor > & _extra_stress
Extra stress tensor.
void ComputeLinearViscoelasticStress::computeQpStress ( )
overrideprotectedvirtual

Reimplemented from ComputeLinearElasticStress.

Definition at line 51 of file ComputeLinearViscoelasticStress.C.

52 {
53  _creep_strain[_qp] =
54  _mechanical_strain[_qp] -
57 
59 
60  _stress[_qp] = _elasticity_tensor[_qp] * _elastic_strain[_qp];
61 
63 }
MaterialProperty< RankFourTensor > & _Jacobian_mult
derivative of stress w.r.t. strain (_dstress_dstrain)
const MaterialProperty< RankFourTensor > & _instantaneous_elasticity_tensor_inv
Instantaneous compliance tensor (extracted from a LinearViscoelasticityBase object) ...
const MaterialProperty< RankTwoTensor > & _apparent_creep_strain
Apparent creep strain (extracted from a LinearViscoelasticityBase object)
MaterialProperty< RankTwoTensor > & _stress
const MaterialProperty< RankTwoTensor > & _mechanical_strain
MaterialProperty< RankTwoTensor > & _creep_strain
Creep strain variable.
const MaterialProperty< RankFourTensor > & _elasticity_tensor
const MaterialProperty< RankFourTensor > & _apparent_elasticity_tensor
Apparent elasticity tensor (extracted from a LinearViscoelasticityBase object)
MaterialProperty< RankTwoTensor > & _elastic_strain
void ComputeLinearElasticStress::initialSetup ( )
virtualinherited

Definition at line 25 of file ComputeLinearElasticStress.C.

26 {
27  if (hasBlockMaterialProperty<RankTwoTensor>(_base_name + "strain_increment"))
28  mooseError("This linear elastic stress calculation only works for small strains; use "
29  "ComputeFiniteStrainElasticStress for simulations using incremental and finite "
30  "strains.");
31 }
const std::string _base_name
void ComputeLinearViscoelasticStress::initQpStatefulProperties ( )
overrideprotectedvirtual

Reimplemented from ComputeStressBase.

Definition at line 45 of file ComputeLinearViscoelasticStress.C.

46 {
47  _creep_strain[_qp].zero();
48 }
MaterialProperty< RankTwoTensor > & _creep_strain
Creep strain variable.

Member Data Documentation

const MaterialProperty<RankTwoTensor>& ComputeLinearViscoelasticStress::_apparent_creep_strain
protected

Apparent creep strain (extracted from a LinearViscoelasticityBase object)

Definition at line 42 of file ComputeLinearViscoelasticStress.h.

Referenced by computeQpStress().

const MaterialProperty<RankFourTensor>& ComputeLinearViscoelasticStress::_apparent_elasticity_tensor
protected

Apparent elasticity tensor (extracted from a LinearViscoelasticityBase object)

Definition at line 44 of file ComputeLinearViscoelasticStress.h.

Referenced by computeQpStress().

const std::string ComputeStressBase::_base_name
protectedinherited
MaterialProperty<RankTwoTensor>& ComputeLinearViscoelasticStress::_creep_strain
protected

Creep strain variable.

Definition at line 38 of file ComputeLinearViscoelasticStress.h.

Referenced by computeQpStress(), and initQpStatefulProperties().

const MaterialProperty<RankTwoTensor>& ComputeLinearViscoelasticStress::_creep_strain_old
protected

Definition at line 39 of file ComputeLinearViscoelasticStress.h.

MaterialProperty<RankTwoTensor>& ComputeStressBase::_elastic_strain
protectedinherited
const MaterialProperty<RankFourTensor>& ComputeStressBase::_elasticity_tensor
protectedinherited
const std::string ComputeStressBase::_elasticity_tensor_name
protectedinherited
const MaterialProperty<RankTwoTensor>& ComputeStressBase::_extra_stress
protectedinherited
MaterialProperty<RankTwoTensor>* ComputeStressBase::_initial_stress
protectedinherited

Initial stress, if provided. InitialStress Deprecation: remove this.

Definition at line 74 of file ComputeStressBase.h.

Referenced by ComputeStressBase::initQpStatefulProperties().

std::vector<Function *> ComputeStressBase::_initial_stress_fcn
protectedinherited

initial stress components

Definition at line 62 of file ComputeStressBase.h.

Referenced by ComputeStressBase::ComputeStressBase(), and ComputeStressBase::initQpStatefulProperties().

const MaterialProperty<RankTwoTensor>* ComputeStressBase::_initial_stress_old
protectedinherited

Old value of initial stress, which is needed to correctly implement finite-strain rotations. InitialStress Deprecation: remove this.

Definition at line 77 of file ComputeStressBase.h.

const bool ComputeStressBase::_initial_stress_provided
protectedinherited
const MaterialProperty<RankFourTensor>& ComputeLinearViscoelasticStress::_instantaneous_elasticity_tensor_inv
protected

Instantaneous compliance tensor (extracted from a LinearViscoelasticityBase object)

Definition at line 46 of file ComputeLinearViscoelasticStress.h.

Referenced by computeQpStress().

MaterialProperty<RankFourTensor>& ComputeStressBase::_Jacobian_mult
protectedinherited
const MaterialProperty<RankTwoTensor>& ComputeLinearElasticStress::_mechanical_strain
protectedinherited
const bool ComputeStressBase::_store_stress_old
protectedinherited

Parameter which decides whether to store old stress. This is required for HHT time integration and Rayleigh damping.

Definition at line 68 of file ComputeStressBase.h.

MaterialProperty<RankTwoTensor>& ComputeStressBase::_stress
protectedinherited

Definition at line 53 of file ComputeStressBase.h.

Referenced by ComputeStressBase::addQpInitialStress(), ComputeMultipleInelasticCosseratStress::computeAdmissibleState(), ComputeMultipleInelasticStress::computeAdmissibleState(), ComputeStressBase::computeQpProperties(), ComputeStressEosBase::computeQpProperties(), ComputeBirchMurnaghanEquationOfStress::computeQpProperties(), ComputeLinearElasticStress::computeQpStress(), ComputeStrainIncrementBasedStress::computeQpStress(), ComputeLinearElasticPFFractureStress::computeQpStress(), ComputeCosseratLinearElasticStress::computeQpStress(), ComputeFiniteStrainElasticStress::computeQpStress(), ComputeIsotropicLinearElasticPFFractureStress::computeQpStress(), ComputeFiniteStrainElasticStressBirchMurnaghan::computeQpStress(), FiniteStrainPlasticMaterial::computeQpStress(), ComputeMultiPlasticityStress::computeQpStress(), ComputeSmearedCrackingStress::computeQpStress(), computeQpStress(), ComputeMultipleInelasticStress::computeQpStressIntermediateConfiguration(), ComputeSmearedCrackingStress::crackingStressRotation(), ComputeMultipleInelasticStress::finiteStrainRotation(), ComputeStressBase::initQpStatefulProperties(), FiniteStrainCrystalPlasticity::initQpStatefulProperties(), FiniteStrainUObasedCP::initQpStatefulProperties(), FiniteStrainHyperElasticViscoPlastic::initQpStatefulProperties(), ComputeMultiPlasticityStress::postReturnMap(), FiniteStrainUObasedCP::postSolveQp(), FiniteStrainHyperElasticViscoPlastic::postSolveQp(), FiniteStrainCrystalPlasticity::postSolveQp(), ComputeMultipleInelasticStress::updateQpState(), ComputeMultipleInelasticStress::updateQpStateSingleModel(), and LinearIsoElasticPFDamage::updateVar().


The documentation for this class was generated from the following files: