ComputeMeanThermalExpansionFunctionEigenstrain computes an eigenstrain for thermal expansion according to a mean thermal expansion function. More...

#include <ComputeMeanThermalExpansionFunctionEigenstrain.h>

Inheritance diagram for ComputeMeanThermalExpansionFunctionEigenstrainTempl< is_ad >:

[legend]

Public Types
typedef DerivativeMaterialPropertyNameInterface::SymbolName	SymbolName

Public Member Functions
	ComputeMeanThermalExpansionFunctionEigenstrainTempl (const InputParameters &parameters)

virtual void	subdomainSetup () final
	resize _temperature_buffer More...

virtual void	computeProperties () final
	update _temperature_buffer More...

virtual void	computeQpEigenstrain () override

const GenericMaterialProperty< U, is_ad > &	getDefaultMaterialProperty (const std::string &name)

const GenericMaterialProperty< U, is_ad > &	getDefaultMaterialPropertyByName (const std::string &name)

void	validateDerivativeMaterialPropertyBase (const std::string &base)

const MaterialPropertyName	derivativePropertyName (const MaterialPropertyName &base, const std::vector< SymbolName > &c) const

const MaterialPropertyName	derivativePropertyNameFirst (const MaterialPropertyName &base, const SymbolName &c1) const

const MaterialPropertyName	derivativePropertyNameSecond (const MaterialPropertyName &base, const SymbolName &c1, const SymbolName &c2) const

const MaterialPropertyName	derivativePropertyNameThird (const MaterialPropertyName &base, const SymbolName &c1, const SymbolName &c2, const SymbolName &c3) const

GenericMaterialProperty< U, is_ad > &	declarePropertyDerivative (const std::string &base, const std::vector< VariableName > &c)

GenericMaterialProperty< U, is_ad > &	declarePropertyDerivative (const std::string &base, const std::vector< SymbolName > &c)

GenericMaterialProperty< U, is_ad > &	declarePropertyDerivative (const std::string &base, const SymbolName &c1, const SymbolName &c2="", const SymbolName &c3="")

GenericMaterialProperty< U, is_ad > &	declarePropertyDerivative (const std::string &base, const std::vector< VariableName > &c)

GenericMaterialProperty< U, is_ad > &	declarePropertyDerivative (const std::string &base, const std::vector< SymbolName > &c)

GenericMaterialProperty< U, is_ad > &	declarePropertyDerivative (const std::string &base, const SymbolName &c1, const SymbolName &c2="", const SymbolName &c3="")

const GenericMaterialProperty< U, is_ad > &	getMaterialPropertyDerivative (const std::string &base, const std::vector< VariableName > &c)

const GenericMaterialProperty< U, is_ad > &	getMaterialPropertyDerivative (const std::string &base, const std::vector< SymbolName > &c)

const GenericMaterialProperty< U, is_ad > &	getMaterialPropertyDerivative (const std::string &base, const SymbolName &c1, const SymbolName &c2="", const SymbolName &c3="")

const GenericMaterialProperty< U, is_ad > &	getMaterialPropertyDerivative (const std::string &base, const SymbolName &c1, unsigned int v2, unsigned int v3=libMesh::invalid_uint)

const GenericMaterialProperty< U, is_ad > &	getMaterialPropertyDerivative (const std::string &base, unsigned int v1, unsigned int v2=libMesh::invalid_uint, unsigned int v3=libMesh::invalid_uint)

const GenericMaterialProperty< U, is_ad > &	getMaterialPropertyDerivative (const std::string &base, const std::vector< VariableName > &c)

const GenericMaterialProperty< U, is_ad > &	getMaterialPropertyDerivative (const std::string &base, const std::vector< SymbolName > &c)

const GenericMaterialProperty< U, is_ad > &	getMaterialPropertyDerivative (const std::string &base, const SymbolName &c1, const SymbolName &c2="", const SymbolName &c3="")

const GenericMaterialProperty< U, is_ad > &	getMaterialPropertyDerivative (const std::string &base, const SymbolName &c1, unsigned int v2, unsigned int v3=libMesh::invalid_uint)

const GenericMaterialProperty< U, is_ad > &	getMaterialPropertyDerivative (const std::string &base, unsigned int v1, unsigned int v2=libMesh::invalid_uint, unsigned int v3=libMesh::invalid_uint)

const GenericMaterialProperty< U, is_ad > &	getMaterialPropertyDerivativeByName (const MaterialPropertyName &base, const std::vector< VariableName > &c)

const GenericMaterialProperty< U, is_ad > &	getMaterialPropertyDerivativeByName (const MaterialPropertyName &base, const std::vector< SymbolName > &c)

const GenericMaterialProperty< U, is_ad > &	getMaterialPropertyDerivativeByName (const MaterialPropertyName &base, const SymbolName &c1, const SymbolName &c2="", const SymbolName &c3="")

const GenericMaterialProperty< U, is_ad > &	getMaterialPropertyDerivativeByName (const MaterialPropertyName &base, const std::vector< VariableName > &c)

const GenericMaterialProperty< U, is_ad > &	getMaterialPropertyDerivativeByName (const MaterialPropertyName &base, const std::vector< SymbolName > &c)

const GenericMaterialProperty< U, is_ad > &	getMaterialPropertyDerivativeByName (const MaterialPropertyName &base, const SymbolName &c1, const SymbolName &c2="", const SymbolName &c3="")

void	validateCoupling (const MaterialPropertyName &base, const std::vector< VariableName > &c, bool validate_aux=true)

void	validateCoupling (const MaterialPropertyName &base, const VariableName &c1="", const VariableName &c2="", const VariableName &c3="")

void	validateCoupling (const MaterialPropertyName &base, const std::vector< VariableName > &c, bool validate_aux=true)

void	validateCoupling (const MaterialPropertyName &base, const VariableName &c1="", const VariableName &c2="", const VariableName &c3="")

void	validateNonlinearCoupling (const MaterialPropertyName &base, const VariableName &c1="", const VariableName &c2="", const VariableName &c3="")

void	validateNonlinearCoupling (const MaterialPropertyName &base, const VariableName &c1="", const VariableName &c2="", const VariableName &c3="")

const MaterialPropertyName	propertyName (const MaterialPropertyName &base, const std::vector< SymbolName > &c) const

const MaterialPropertyName	propertyName (const MaterialPropertyName &base, const std::vector< SymbolName > &c) const

const MaterialPropertyName	propertyNameFirst (const MaterialPropertyName &base, const SymbolName &c1) const

const MaterialPropertyName	propertyNameFirst (const MaterialPropertyName &base, const SymbolName &c1) const

const MaterialPropertyName	propertyNameSecond (const MaterialPropertyName &base, const SymbolName &c1, const SymbolName &c2) const

const MaterialPropertyName	propertyNameSecond (const MaterialPropertyName &base, const SymbolName &c1, const SymbolName &c2) const

const MaterialPropertyName	propertyNameThird (const MaterialPropertyName &base, const SymbolName &c1, const SymbolName &c2, const SymbolName &c3) const

const MaterialPropertyName	propertyNameThird (const MaterialPropertyName &base, const SymbolName &c1, const SymbolName &c2, const SymbolName &c3) const

Static Public Member Functions
static InputParameters	validParams ()

Protected Member Functions
virtual Real	referenceTemperature () override
	Get the reference temperature for the mean thermal expansion relationship. More...

virtual ValueAndDerivative< is_ad >	meanThermalExpansionCoefficient (const ValueAndDerivative< is_ad > &temperature) override

virtual ValueAndDerivative< is_ad >	computeThermalStrain () override
	Compute the total thermal strain relative to the stress-free temperature at the current temperature along with its temperature derivative. More...

Protected Attributes
const Function &	_thermal_expansion_function

const Real &	_thexp_func_ref_temp

const Real	_thermal_expansion_scale_factor
	Scalar multiplier applied to the strain for sensitivity studies and debugging. More...

const std::vector< ValueAndDerivative< is_ad > > &	_temperature
	Temperature to use in the eigenstrain calculation (current value if _use_old_temperature=false, old value if _use_old_temperature=true). More...

const bool	_use_old_temperature
	lag temperature variable More...

const VariableValue &	_temperature_old
	previous time step temperature More...

MaterialProperty< RankTwoTensor > *	_deigenstrain_dT

const VariableValue &	_stress_free_temperature

Detailed Description

template<bool is_ad>
class ComputeMeanThermalExpansionFunctionEigenstrainTempl< is_ad >

ComputeMeanThermalExpansionFunctionEigenstrain computes an eigenstrain for thermal expansion according to a mean thermal expansion function.

Definition at line 19 of file ComputeMeanThermalExpansionFunctionEigenstrain.h.

Constructor & Destructor Documentation

◆ ComputeMeanThermalExpansionFunctionEigenstrainTempl()

template<bool is_ad>

ComputeMeanThermalExpansionFunctionEigenstrainTempl< is_ad >::ComputeMeanThermalExpansionFunctionEigenstrainTempl ( const InputParameters & parameters )

Definition at line 35 of file ComputeMeanThermalExpansionFunctionEigenstrain.C.

   : ComputeMeanThermalExpansionEigenstrainBaseTempl<is_ad>(parameters),
     _thermal_expansion_function(this->getFunction("thermal_expansion_function")),
     _thexp_func_ref_temp(
         this->template getParam<Real>("thermal_expansion_function_reference_temperature"))
 {
 }

Member Function Documentation

◆ computeProperties()

template<bool is_ad>

void ComputeThermalExpansionEigenstrainBaseTempl< is_ad >::computeProperties ( )

finalvirtualinherited

update _temperature_buffer

Definition at line 71 of file ComputeThermalExpansionEigenstrainBase.C.

 {
   // we need to convert the temperature variable to a ChainedReal in the is_ad == false case
   for (_qp = 0; _qp < this->_qrule->n_points(); ++_qp)
     if constexpr (is_ad)
       _temperature_buffer[_qp] =
           _use_old_temperature ? _temperature_old[_qp] : _temperature_prop[_qp];
     else
     {
       if (_use_old_temperature)
         _temperature_buffer[_qp] = {_temperature_old[_qp], 0};
       else
         _temperature_buffer[_qp] = {_temperature_prop[_qp], 1};
     }
 
   ComputeEigenstrainBaseTempl<is_ad>::computeProperties();
 }

◆ computeQpEigenstrain()

template<bool is_ad>

void ComputeThermalExpansionEigenstrainBaseTempl< is_ad >::computeQpEigenstrain ( )

overridevirtualinherited

Definition at line 91 of file ComputeThermalExpansionEigenstrainBase.C.

 {
   _eigenstrain[_qp].zero();
   const auto thermal_strain = computeThermalStrain();
 
   if constexpr (is_ad)
   {
     _eigenstrain[_qp].addIa(thermal_strain);
     if (_mean_thermal_expansion_coefficient)
     {
       if (_temperature[_qp] == _stress_free_temperature[_qp])
         (*_mean_thermal_expansion_coefficient)[_qp] = 0.0;
       else
         (*_mean_thermal_expansion_coefficient)[_qp] = MetaPhysicL::raw_value(
             thermal_strain / (_temperature[_qp] - _stress_free_temperature[_qp]));
     }
   }
   else
   {
     _eigenstrain[_qp].addIa(thermal_strain.value());
     if (_mean_thermal_expansion_coefficient)
     {
       if (_temperature[_qp].value() == _stress_free_temperature[_qp])
         (*_mean_thermal_expansion_coefficient)[_qp] = 0.0;
       else
         (*_mean_thermal_expansion_coefficient)[_qp] =
             thermal_strain.value() / (_temperature[_qp].value() - _stress_free_temperature[_qp]);
     }
     if (_deigenstrain_dT)
     {
       (*_deigenstrain_dT)[_qp].zero();
       if (!_use_old_temperature)
         (*_deigenstrain_dT)[_qp].addIa(thermal_strain.derivatives());
     }
   }
 }

◆ computeThermalStrain()

template<bool is_ad>

ValueAndDerivative< is_ad > ComputeMeanThermalExpansionEigenstrainBaseTempl< is_ad >::computeThermalStrain ( )

overrideprotectedvirtualinherited

Compute the total thermal strain relative to the stress-free temperature at the current temperature along with its temperature derivative.

Implements ComputeThermalExpansionEigenstrainBaseTempl< is_ad >.

Definition at line 39 of file ComputeMeanThermalExpansionEigenstrainBase.C.

 {
   const auto reference_temperature = referenceTemperature();
 
   const auto current_alphabar = meanThermalExpansionCoefficient(this->_temperature[_qp]);
   const auto thexp_T = current_alphabar * (this->_temperature[_qp] - reference_temperature);
 
   // Mean linear thermal expansion coefficient relative to the reference temperature
   // evaluated at stress_free_temperature.  This is
   // \f$\bar{\alpha} = (\delta L(T_{sf}) / L) / (T_{sf} - T_{ref})\f$
   // where \f$T_sf\f$ is the stress-free temperature and \f$T_{ref}\f$ is the reference temperature.
   const auto alphabar_stress_free_temperature =
       meanThermalExpansionCoefficient(this->_stress_free_temperature[_qp]);
 
   // Thermal expansion relative to the reference temperature evaluated at stress_free_temperature
   // \f$(\delta L(T_sf) / L)\f$, where \f$T_sf\f$ is the stress-free temperature.
   const auto thexp_stress_free_temperature =
       alphabar_stress_free_temperature *
       (this->_stress_free_temperature[_qp] - referenceTemperature());
 
   // Per M. Niffenegger and K. Reichlin (2012), thermal_strain should be divided
   // by (1.0 + thexp_stress_free_temperature) to account for the ratio of
   // the length at the stress-free temperature to the length at the reference
   // temperature. It can be neglected because it is very close to 1,
   // but we include it for completeness here.
 
   auto thermal_strain =
       (thexp_T - thexp_stress_free_temperature) / (1.0 + thexp_stress_free_temperature);
 
   return _thermal_expansion_scale_factor * thermal_strain;
 }

◆ meanThermalExpansionCoefficient()

template<bool is_ad>

ValueAndDerivative< is_ad > ComputeMeanThermalExpansionFunctionEigenstrainTempl< is_ad >::meanThermalExpansionCoefficient ( const ValueAndDerivative< is_ad > & temperature )

overrideprotectedvirtual

Implements ComputeMeanThermalExpansionEigenstrainBaseTempl< is_ad >.

Definition at line 52 of file ComputeMeanThermalExpansionFunctionEigenstrain.C.

 {
   // we need these two branches because we cannot yet evaluate Functions with ChainedReals
   if constexpr (is_ad)
     return _thermal_expansion_function.value(temperature);
   else
     return {_thermal_expansion_function.value(temperature.value()),
             _thermal_expansion_function.timeDerivative(temperature.value()) *
                 temperature.derivatives()};
 }

◆ referenceTemperature()

template<bool is_ad>

Real ComputeMeanThermalExpansionFunctionEigenstrainTempl< is_ad >::referenceTemperature ( )

overrideprotectedvirtual

Get the reference temperature for the mean thermal expansion relationship.

This is the temperature at which \(\delta L = 0\).

Implements ComputeMeanThermalExpansionEigenstrainBaseTempl< is_ad >.

Definition at line 45 of file ComputeMeanThermalExpansionFunctionEigenstrain.C.

 {
   return _thexp_func_ref_temp;
 }

◆ subdomainSetup()

template<bool is_ad>

void ComputeThermalExpansionEigenstrainBaseTempl< is_ad >::subdomainSetup ( )

finalvirtualinherited

resize _temperature_buffer

Definition at line 59 of file ComputeThermalExpansionEigenstrainBase.C.

 {
   // call parent class subdomain setup, which ultimately calls Material::subdomainSetup()
   ComputeEigenstrainBaseTempl<is_ad>::subdomainSetup();
 
   // make sure we have enouch space to hold the augmented temperature values
   const auto nqp = this->_fe_problem.getMaxQps();
   _temperature_buffer.resize(nqp);
 }

◆ validParams()

template<bool is_ad>

InputParameters ComputeMeanThermalExpansionFunctionEigenstrainTempl< is_ad >::validParams ( )

static

Definition at line 18 of file ComputeMeanThermalExpansionFunctionEigenstrain.C.

 {
   InputParameters params = ComputeMeanThermalExpansionEigenstrainBaseTempl<is_ad>::validParams();
   params.addClassDescription("Computes eigenstrain due to thermal expansion using a function that "
                              "describes the mean thermal expansion as a function of temperature");
   params.addRequiredParam<FunctionName>(
       "thermal_expansion_function",
       "Function describing the mean thermal expansion as a function of temperature");
   params.addRequiredParam<Real>("thermal_expansion_function_reference_temperature",
                                 "Reference temperature for thermal_exansion_function (IMPORTANT: "
                                 "this is different in general from the stress_free_temperature)");
 
   return params;
 }