ComputeIsotropicElasticityTensor::ComputeIsotropicElasticityTensor(const InputParameters & parameters) :
ComputeElasticityTensorBase(parameters),
_bulk_modulus_set( parameters.isParamValid("bulk_modulus") ),
_lambda_set( parameters.isParamValid("lambda") ),
_poissons_ratio_set( parameters.isParamValid("poissons_ratio") ),
_shear_modulus_set( parameters.isParamValid("shear_modulus") ),
_youngs_modulus_set( parameters.isParamValid("youngs_modulus") ),
_bulk_modulus( _bulk_modulus_set ? getParam<Real>("bulk_modulus") : -1 ),
_lambda( _lambda_set ? getParam<Real>("lambda") : -1 ),
_poissons_ratio( _poissons_ratio_set ? getParam<Real>("poissons_ratio") : -1 ),
_shear_modulus( _shear_modulus_set ? getParam<Real>("shear_modulus") : -1 ),
_youngs_modulus( _youngs_modulus_set ? getParam<Real>("youngs_modulus") : -1 )
{
std::vector<Real> iso_const(2);
if (_lambda_set && _shear_modulus_set)
{
iso_const[0] = _lambda;
iso_const[1] = _shear_modulus;
}
else if (_youngs_modulus_set && _poissons_ratio_set)
{
iso_const[0] = _youngs_modulus*_poissons_ratio/((1 + _poissons_ratio)*(1 - 2*_poissons_ratio));
iso_const[1] = _youngs_modulus/(2*(1 + _poissons_ratio));
}
else if (_shear_modulus_set && _bulk_modulus_set)
{
iso_const[0] = _bulk_modulus - 2.0/3.0*_shear_modulus;
iso_const[1] = _shear_modulus;
}
else
mooseError("Incorrect combination of elastic properties in ComputeIsotropicElasticityTensor. Possible combinations are: lambda and shear_modulus, youngs_modulus and poissons_ratio, or bulk_modulus and shear_modulus.");
//Fill elasticity tensor
_Cijkl.fillFromInputVector(iso_const, RankFourTensor::symmetric_isotropic);
}
ComputeIsotropicElasticityTensor::ComputeIsotropicElasticityTensor(
const InputParameters & parameters)
: ComputeElasticityTensorBase(parameters),
_bulk_modulus_set(parameters.isParamValid("bulk_modulus")),
_lambda_set(parameters.isParamValid("lambda")),
_poissons_ratio_set(parameters.isParamValid("poissons_ratio")),
_shear_modulus_set(parameters.isParamValid("shear_modulus")),
_youngs_modulus_set(parameters.isParamValid("youngs_modulus")),
_bulk_modulus(_bulk_modulus_set ? getParam<Real>("bulk_modulus") : -1),
_lambda(_lambda_set ? getParam<Real>("lambda") : -1),
_poissons_ratio(_poissons_ratio_set ? getParam<Real>("poissons_ratio") : -1),
_shear_modulus(_shear_modulus_set ? getParam<Real>("shear_modulus") : -1),
_youngs_modulus(_youngs_modulus_set ? getParam<Real>("youngs_modulus") : -1)
{
unsigned int num_elastic_constants = _bulk_modulus_set + _lambda_set + _poissons_ratio_set +
_shear_modulus_set + _youngs_modulus_set;
if (num_elastic_constants != 2)
mooseError("Exactly two elastic constants must be defined for material '" + name() + "'.");
// all tensors created by this class are always isotropic
issueGuarantee(_elasticity_tensor_name, Guarantee::ISOTROPIC);
if (!isParamValid("elasticity_tensor_prefactor"))
issueGuarantee(_elasticity_tensor_name, Guarantee::CONSTANT_IN_TIME);
if (_bulk_modulus_set && _bulk_modulus <= 0.0)
mooseError("Bulk modulus must be positive in material '" + name() + "'.");
if (_poissons_ratio_set && (_poissons_ratio <= -1.0 || _poissons_ratio >= 0.5))
mooseError("Poissons ratio must be greater than -1 and less than 0.5 in "
"material '" +
name() + "'.");
if (_shear_modulus_set && _shear_modulus < 0.0)
mooseError("Shear modulus must not be negative in material '" + name() + "'.");
if (_youngs_modulus_set && _youngs_modulus <= 0.0)
mooseError("Youngs modulus must be positive in material '" + name() + "'.");
if (_youngs_modulus_set && _poissons_ratio_set)
{
_Cijkl.fillSymmetricIsotropicEandNu(_youngs_modulus, _poissons_ratio);
return;
}
std::vector<Real> iso_const(2);
if (_lambda_set && _shear_modulus_set)
{
iso_const[0] = _lambda;
iso_const[1] = _shear_modulus;
}
else if (_shear_modulus_set && _bulk_modulus_set)
{
iso_const[0] = _bulk_modulus - 2.0 / 3.0 * _shear_modulus;
iso_const[1] = _shear_modulus;
}
else if (_poissons_ratio_set && _bulk_modulus_set)
{
iso_const[0] = 3.0 * _bulk_modulus * _poissons_ratio / (1.0 + _poissons_ratio);
iso_const[1] =
3.0 * _bulk_modulus * (1.0 - 2.0 * _poissons_ratio) / (2.0 * (1.0 + _poissons_ratio));
}
else if (_lambda_set && _bulk_modulus_set)
{
iso_const[0] = _lambda;
iso_const[1] = 3.0 * (_bulk_modulus - _lambda) / 2.0;
}
else if (_shear_modulus_set && _youngs_modulus_set)
{
iso_const[0] = _shear_modulus * (_youngs_modulus - 2.0 * _shear_modulus) /
(3.0 * _shear_modulus - _youngs_modulus);
iso_const[1] = _shear_modulus;
}
else if (_shear_modulus_set && _poissons_ratio_set)
{
iso_const[0] = 2.0 * _shear_modulus * _poissons_ratio / (1.0 - 2.0 * _poissons_ratio);
iso_const[1] = _shear_modulus;
}
else if (_youngs_modulus_set && _bulk_modulus_set)
{
iso_const[0] = 3.0 * _bulk_modulus * (3.0 * _bulk_modulus - _youngs_modulus) /
(9.0 * _bulk_modulus - _youngs_modulus);
iso_const[1] = 3.0 * _bulk_modulus * _youngs_modulus / (9.0 * _bulk_modulus - _youngs_modulus);
}
else if (_lambda_set && _poissons_ratio_set)
{
iso_const[0] = _lambda;
iso_const[1] = _lambda * (1.0 - 2.0 * _poissons_ratio) / (2.0 * _poissons_ratio);
}
else if (_lambda_set && _youngs_modulus_set)
{
iso_const[0] = _lambda;
iso_const[1] = (_youngs_modulus - 3.0 * _lambda +
std::sqrt(_youngs_modulus * _youngs_modulus + 9.0 * _lambda * _lambda +
2.0 * _youngs_modulus * _lambda)) /
4.0;
}
else
mooseError("Incorrect combination of elastic properties in ComputeIsotropicElasticityTensor.");
// Fill elasticity tensor
_Cijkl.fillFromInputVector(iso_const, RankFourTensor::symmetric_isotropic);
}
