ComputeMeanThermalExpansionEigenstrainBase is a base class for computing the thermal expansion eigenstrain according to a temperature-dependent mean thermal expansion defined in a derived class. More...

#include <ComputeMeanThermalExpansionEigenstrainBase.h>

Inheritance diagram for ComputeMeanThermalExpansionEigenstrainBaseTempl< is_ad >:

[legend]

Public Types
typedef DerivativeMaterialPropertyNameInterface::SymbolName	SymbolName

Public Member Functions
	ComputeMeanThermalExpansionEigenstrainBaseTempl (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 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...

virtual Real	referenceTemperature ()=0
	Get the reference temperature for the mean thermal expansion relationship. More...

virtual ValueAndDerivative< is_ad >	meanThermalExpansionCoefficient (const ValueAndDerivative< is_ad > &temperature)=0

Protected Attributes
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 ComputeMeanThermalExpansionEigenstrainBaseTempl< is_ad >

ComputeMeanThermalExpansionEigenstrainBase is a base class for computing the thermal expansion eigenstrain according to a temperature-dependent mean thermal expansion defined in a derived class.

This is defined as the total total linear strain ( \(\delta L / L\)) at a given temperature relative to a reference temperature at which \(\delta L = 0\).

Based on: M. Niffenegger and K. Reichlin. The proper use of thermal expansion coefficients in finite element calculations. Nuclear Engineering and Design, 243:356-359, Feb. 2012.

Definition at line 26 of file ComputeMeanThermalExpansionEigenstrainBase.h.

Constructor & Destructor Documentation

◆ ComputeMeanThermalExpansionEigenstrainBaseTempl()

template<bool is_ad>

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

Definition at line 31 of file ComputeMeanThermalExpansionEigenstrainBase.C.

   : ComputeThermalExpansionEigenstrainBaseTempl<is_ad>(parameters),
     _thermal_expansion_scale_factor(this->template getParam<Real>("thermal_expansion_scale_factor"))
 {
 }

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 ( )

overrideprotectedvirtual

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>

virtual ValueAndDerivative<is_ad> ComputeMeanThermalExpansionEigenstrainBaseTempl< is_ad >::meanThermalExpansionCoefficient ( const ValueAndDerivative< is_ad > & temperature )

protectedpure virtual

Implemented in ComputeMeanThermalExpansionFunctionEigenstrainTempl< is_ad >.

◆ referenceTemperature()

template<bool is_ad>

virtual Real ComputeMeanThermalExpansionEigenstrainBaseTempl< is_ad >::referenceTemperature ( )

protectedpure virtual

Get the reference temperature for the mean thermal expansion relationship.

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

Implemented in ComputeMeanThermalExpansionFunctionEigenstrainTempl< is_ad >.

◆ 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 ComputeMeanThermalExpansionEigenstrainBaseTempl< is_ad >::validParams ( )

static

Definition at line 15 of file ComputeMeanThermalExpansionEigenstrainBase.C.

Referenced by ComputeMeanThermalExpansionFunctionEigenstrainTempl< is_ad >::validParams().

 {
   InputParameters params = ComputeThermalExpansionEigenstrainBaseTempl<is_ad>::validParams();
   params.addClassDescription("Base class for models that compute eigenstrain due to mean"
                              "thermal expansion as a function of temperature");
   params.addParam<Real>("thermal_expansion_scale_factor",
                         1.0,
                         "Scaling factor on the thermal expansion strain. This input parameter can "
                         "be used to perform sensitivity analysis on thermal expansion.");
   params.addParamNamesToGroup("thermal_expansion_scale_factor", "Advanced");
 
   return params;
 }