ComputeExtraStressVDWGas Class Reference

Computes a concentration-dependent ExtraStress bases on the van der Waals equation of state that is added to the stress computed by the constitutive model. More...

#include <ComputeExtraStressVDWGas.h>

Inheritance diagram for ComputeExtraStressVDWGas:

Public Member Functions
	ComputeExtraStressVDWGas (const InputParameters &parameters)

Static Public Member Functions
static InputParameters	validParams ()

Protected Member Functions
virtual void	computeQpExtraStress ()
virtual void	computeQpProperties ()

Protected Attributes
const MaterialProperty< Real > &	_b
const MaterialProperty< Real > &	_Va
const MaterialProperty< Real > &	_T
const VariableValue &	_cg
const Real	_nondim_factor
const Real	_kB
const std::string	_base_name
std::string	_extra_stress_name
MaterialProperty< RankTwoTensor > &	_extra_stress

Detailed Description

Computes a concentration-dependent ExtraStress bases on the van der Waals equation of state that is added to the stress computed by the constitutive model.

Definition at line 23 of file ComputeExtraStressVDWGas.h.

Constructor & Destructor Documentation

ComputeExtraStressVDWGas()

ComputeExtraStressVDWGas::ComputeExtraStressVDWGas

(

const InputParameters &

parameters

)

Definition at line 36 of file ComputeExtraStressVDWGas.C.

  : ComputeExtraStressBase(parameters),
    _b(getMaterialProperty<Real>("b")),
    _Va(getMaterialProperty<Real>("Va")),
    _T(getMaterialProperty<Real>("T")),
    _cg(coupledValue("cg")),
    _nondim_factor(getParam<Real>("nondim_factor")),
    _kB(1.38064852e-23) // Boltzmann constant in J/K
{
}

Member Function Documentation

computeQpExtraStress()

void ComputeExtraStressVDWGas::computeQpExtraStress ( )

protectedvirtual

Implements ComputeExtraStressBase.

Definition at line 48 of file ComputeExtraStressVDWGas.C.

{
  _extra_stress[_qp].zero();
  _extra_stress[_qp].addIa(-_kB * _T[_qp] / (_Va[_qp] / _cg[_qp] - _b[_qp]) * 1.0e27 /
                           _nondim_factor);
}

computeQpProperties()

void ComputeExtraStressBase::computeQpProperties ( )

protectedvirtualinherited

Definition at line 34 of file ComputeExtraStressBase.C.

{
  computeQpExtraStress();
}

validParams()

InputParameters ComputeExtraStressVDWGas::validParams ( )

static

Definition at line 17 of file ComputeExtraStressVDWGas.C.

{
  InputParameters params = ComputeExtraStressBase::validParams();
  params.addClassDescription(
      "Computes a hydrostatic stress corresponding to the pressure of a van der Waals gas that is "
      "added as an extra_stress to the stress computed by the constitutive model");
  params.addRequiredParam<MaterialPropertyName>(
      "b", "Hard-sphere exclusion volume of van der Waals gas atoms in nm^3");
  params.addRequiredParam<MaterialPropertyName>("Va", "Atomic volume of lattice atoms in nm^3");
  params.addRequiredParam<MaterialPropertyName>("T", "Temperature in K");
  params.addRequiredCoupledVar("cg", "Gas concentration (relative to lattice atoms)");
  params.addParam<Real>("nondim_factor",
                        1.0,
                        "Optional factor to non-dimensionalize pressure (pressure is calculated in "
                        "Pa, set this factor to characteristic energy density used for "
                        "non-dimensionalization if desired)");
  return params;
}

Member Data Documentation

_b

const MaterialProperty<Real>& ComputeExtraStressVDWGas::_b

protected

Definition at line 33 of file ComputeExtraStressVDWGas.h.

Referenced by computeQpExtraStress().

_base_name

const std::string ComputeExtraStressBase::_base_name

protectedinherited

Definition at line 35 of file ComputeExtraStressBase.h.

_cg

const VariableValue& ComputeExtraStressVDWGas::_cg

protected

Definition at line 37 of file ComputeExtraStressVDWGas.h.

Referenced by computeQpExtraStress().

_extra_stress

MaterialProperty<RankTwoTensor>& ComputeExtraStressBase::_extra_stress

protectedinherited

Definition at line 38 of file ComputeExtraStressBase.h.

Referenced by ComputeExtraStressConstant::computeQpExtraStress(), and computeQpExtraStress().

_extra_stress_name

std::string ComputeExtraStressBase::_extra_stress_name

protectedinherited

Definition at line 36 of file ComputeExtraStressBase.h.

_kB

const Real ComputeExtraStressVDWGas::_kB

protected

Definition at line 39 of file ComputeExtraStressVDWGas.h.

Referenced by computeQpExtraStress().

_nondim_factor

const Real ComputeExtraStressVDWGas::_nondim_factor

protected

Definition at line 38 of file ComputeExtraStressVDWGas.h.

Referenced by computeQpExtraStress().

_T

const MaterialProperty<Real>& ComputeExtraStressVDWGas::_T

protected

Definition at line 35 of file ComputeExtraStressVDWGas.h.

Referenced by computeQpExtraStress().

_Va

const MaterialProperty<Real>& ComputeExtraStressVDWGas::_Va

protected

Definition at line 34 of file ComputeExtraStressVDWGas.h.

Referenced by computeQpExtraStress().

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

• tensor_mechanics/include/materials/ComputeExtraStressVDWGas.h
• tensor_mechanics/src/materials/ComputeExtraStressVDWGas.C