TensorMechanicsHardeningCubic Class Reference

Cubic hardening value = _val_0 for p <= _intnl_0 value = _val_res for p >= _intnl_limit value = cubic betwen _val_0 at p = _intnl_0, and _val_res at p = _intnl_limit The cubic is smooth, which means nice numerical properties. More...

#include <TensorMechanicsHardeningCubic.h>

Inheritance diagram for TensorMechanicsHardeningCubic:

Public Member Functions
	TensorMechanicsHardeningCubic (const InputParameters &parameters)
virtual Real	value (Real intnl) const override
virtual Real	derivative (Real intnl) const override
virtual std::string	modelName () const override
void	initialize ()
void	execute ()
void	finalize ()

Static Public Member Functions
static InputParameters	validParams ()

Private Attributes
Real	_val_0
	value is cubic between _val_0 at internal_parameter=_intnl_0, at _val_res at internal_parameter=_intnl_limit More...
Real	_val_res
	value is cubic between _val_0 at internal_parameter=_intnl_0, at _val_res at internal_parameter=_intnl_limit More...
Real	_intnl_0
	value is cubic between _val_0 at internal_parameter=_intnl_0, at _val_res at internal_parameter=_intnl_limit More...
Real	_intnl_limit
	value is cubic between _val_0 at internal_parameter=_intnl_0, at _val_res at internal_parameter=_intnl_limit More...
Real	_half_intnl_limit
	convenience parameter for cubic More...
Real	_alpha
	convenience parameter for cubic More...
Real	_beta
	convenience parameter for cubic More...

Detailed Description

Cubic hardening value = _val_0 for p <= _intnl_0 value = _val_res for p >= _intnl_limit value = cubic betwen _val_0 at p = _intnl_0, and _val_res at p = _intnl_limit The cubic is smooth, which means nice numerical properties.

Definition at line 26 of file TensorMechanicsHardeningCubic.h.

Constructor & Destructor Documentation

TensorMechanicsHardeningCubic()

TensorMechanicsHardeningCubic::TensorMechanicsHardeningCubic

(

const InputParameters &

parameters

)

Definition at line 40 of file TensorMechanicsHardeningCubic.C.

  : TensorMechanicsHardeningModel(parameters),
    _val_0(getParam<Real>("value_0")),
    _val_res(parameters.isParamValid("value_residual") ? getParam<Real>("value_residual") : _val_0),
    _intnl_0(getParam<Real>("internal_0")),
    _intnl_limit(getParam<Real>("internal_limit")),
    _half_intnl_limit(0.5 * (_intnl_limit - _intnl_0)),
    _alpha((_val_0 - _val_res) / (4.0 * Utility::pow<3>(_half_intnl_limit))),
    _beta(-3.0 * _alpha * Utility::pow<2>(_half_intnl_limit))
{
  if (_intnl_limit <= _intnl_0)
    mooseError("internal_limit must be greater than internal_0 in Cubic Hardening");
}

Member Function Documentation

derivative()

Real TensorMechanicsHardeningCubic::derivative ( Real  intnl ) const

overridevirtual

Reimplemented from TensorMechanicsHardeningModel.

Definition at line 68 of file TensorMechanicsHardeningCubic.C.

{
  const Real x = intnl - _intnl_0;
  if (x <= 0.0)
    return 0.0;
  else if (intnl >= _intnl_limit)
    return 0.0;
  else
    return 3.0 * _alpha * Utility::pow<2>(x - _half_intnl_limit) + _beta;
}

execute()

void TensorMechanicsHardeningModel::execute ( )

inherited

Definition at line 36 of file TensorMechanicsHardeningModel.C.

{
}

finalize()

void TensorMechanicsHardeningModel::finalize ( )

inherited

Definition at line 41 of file TensorMechanicsHardeningModel.C.

{
}

initialize()

void TensorMechanicsHardeningModel::initialize ( )

inherited

Definition at line 31 of file TensorMechanicsHardeningModel.C.

{
}

modelName()

std::string TensorMechanicsHardeningCubic::modelName ( ) const

overridevirtual

Implements TensorMechanicsHardeningModel.

Definition at line 80 of file TensorMechanicsHardeningCubic.C.

{
  return "Cubic";
}

validParams()

InputParameters TensorMechanicsHardeningCubic::validParams ( )

static

Definition at line 18 of file TensorMechanicsHardeningCubic.C.

{
  InputParameters params = TensorMechanicsHardeningModel::validParams();
  params.addRequiredParam<Real>(
      "value_0", "The value of the parameter for all internal_parameter <= internal_0");
  params.addParam<Real>("value_residual",
                        "The value of the parameter for internal_parameter >= "
                        "internal_limit.  Default = value_0, ie perfect "
                        "plasticity");
  params.addParam<Real>(
      "internal_0", 0.0, "The value of the internal_parameter when hardening begins");
  params.addParam<Real>("internal_limit",
                        1.0,
                        "The value of the internal_parameter when hardening "
                        "ends.  This hardening forms a cubic between "
                        "(internal_0, value_0) and (internal_limit, "
                        "value_residual) that is smooth at internal_0 and "
                        "internal_limit");
  params.addClassDescription("Hardening is Cubic");
  return params;
}

value()

Real TensorMechanicsHardeningCubic::value ( Real  intnl ) const

overridevirtual

Reimplemented from TensorMechanicsHardeningModel.

Definition at line 55 of file TensorMechanicsHardeningCubic.C.

{
  const Real x = intnl - _intnl_0;
  if (x <= 0.0)
    return _val_0;
  else if (intnl >= _intnl_limit)
    return _val_res;
  else
    return _alpha * Utility::pow<3>(x - _half_intnl_limit) + _beta * (x - _half_intnl_limit) +
           0.5 * (_val_0 + _val_res);
}

Member Data Documentation

_alpha

Real TensorMechanicsHardeningCubic::_alpha

private

convenience parameter for cubic

Definition at line 56 of file TensorMechanicsHardeningCubic.h.

Referenced by derivative(), and value().

_beta

Real TensorMechanicsHardeningCubic::_beta

private

convenience parameter for cubic

Definition at line 59 of file TensorMechanicsHardeningCubic.h.

Referenced by derivative(), and value().

_half_intnl_limit

Real TensorMechanicsHardeningCubic::_half_intnl_limit

private

convenience parameter for cubic

Definition at line 53 of file TensorMechanicsHardeningCubic.h.

Referenced by derivative(), and value().

_intnl_0

Real TensorMechanicsHardeningCubic::_intnl_0

private

value is cubic between _val_0 at internal_parameter=_intnl_0, at _val_res at internal_parameter=_intnl_limit

Definition at line 47 of file TensorMechanicsHardeningCubic.h.

Referenced by derivative(), TensorMechanicsHardeningCubic(), and value().

_intnl_limit

Real TensorMechanicsHardeningCubic::_intnl_limit

private

value is cubic between _val_0 at internal_parameter=_intnl_0, at _val_res at internal_parameter=_intnl_limit

Definition at line 50 of file TensorMechanicsHardeningCubic.h.

Referenced by derivative(), TensorMechanicsHardeningCubic(), and value().

_val_0

Real TensorMechanicsHardeningCubic::_val_0

private

value is cubic between _val_0 at internal_parameter=_intnl_0, at _val_res at internal_parameter=_intnl_limit

Definition at line 41 of file TensorMechanicsHardeningCubic.h.

Referenced by value().

_val_res

Real TensorMechanicsHardeningCubic::_val_res

private

value is cubic between _val_0 at internal_parameter=_intnl_0, at _val_res at internal_parameter=_intnl_limit

Definition at line 44 of file TensorMechanicsHardeningCubic.h.

Referenced by value().

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

• tensor_mechanics/include/userobjects/TensorMechanicsHardeningCubic.h
• tensor_mechanics/src/userobjects/TensorMechanicsHardeningCubic.C