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muSpectre/src/materials/material_stochastic_plasticity.cc
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/**
* @file material_stochastic_plasticity.cc
*
* @author Richard Leute <richard.leute@imtek.uni-freiburg.de>
*
* @date 24 Jan 2019
*
* @brief material for stochastic plasticity as described in Z. Budrikis et al.
* Nature Comm. 8:15928, 2017. It only works together with "python
* -script", which performes the avalanche loop. This makes the material
* slower but more easy to modify and test.
* (copied from material_linear_elastic4.cc)
*
* Copyright © 2019 Till Junge, Richard Leute
*
* µSpectre is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation, either version 3, or (at
* your option) any later version.
*
* µSpectre is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with µSpectre; see the file COPYING. If not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*
* Additional permission under GNU GPL version 3 section 7
*
* If you modify this Program, or any covered work, by linking or combining it
* with proprietary FFT implementations or numerical libraries, containing parts
* covered by the terms of those libraries' licenses, the licensors of this
* Program grant you additional permission to convey the resulting work.
*/
#include "materials/material_stochastic_plasticity.hh"
#include <sstream>
namespace muSpectre {
/* ---------------------------------------------------------------------- */
template <Dim_t DimS, Dim_t DimM>
MaterialStochasticPlasticity<DimS, DimM>::MaterialStochasticPlasticity(
std::string name)
: Parent{name}, lambda_field{make_field<Field_t>(
"local first Lame constant", this->internal_fields)},
mu_field{
make_field<Field_t>("local second Lame constant(shear modulus)",
this->internal_fields)},
plastic_increment_field{
make_field<Field_t>("plastic increment", this->internal_fields)},
stress_threshold_field{
make_field<Field_t>("threshold", this->internal_fields)},
eigen_strain_field{
make_field<LTensor_Field_t>("eigen strain", this->internal_fields)},
overloaded_pixels{std::vector<Ccoord_t<DimS>>()},
internal_variables{
lambda_field.get_const_map(), mu_field.get_const_map(),
eigen_strain_field.get_map()} {}
/* ---------------------------------------------------------------------- */
template <Dim_t DimS, Dim_t DimM>
void MaterialStochasticPlasticity<DimS, DimM>::
add_pixel(const Ccoord_t<DimS> & /*pixel*/) {
throw std::runtime_error
("This material needs pixels with Youngs modulus and Poisson ratio.");
}
/* ---------------------------------------------------------------------- */
template <Dim_t DimS, Dim_t DimM>
void MaterialStochasticPlasticity<DimS, DimM>::add_pixel(
const Ccoord_t<DimS> & pixel, const Real & Young_modulus,
const Real & Poisson_ratio, const Real & plastic_increment,
const Real & stress_threshold,
const Eigen::Ref<const Eigen::Matrix<Real, Eigen::Dynamic,
Eigen::Dynamic>> & eigen_strain) {
// check if the users input eigen strain has the right dimension
if (eigen_strain.cols() != DimM || eigen_strain.rows() != DimM) {
std::stringstream error{};
error << "Got a wrong shape " << std::to_string(eigen_strain.rows())
<< "×" << std::to_string(eigen_strain.cols())
<< " for the eigen strain matrix.\nI expected the shape: "
<< std::to_string(DimM) << "×" << std::to_string(DimM);
throw std::runtime_error(error.str());
}
this->internal_fields.add_pixel(pixel);
// store the first(lambda) and second(mu) Lame constant in the field
Real lambda = Hooke::compute_lambda(Young_modulus, Poisson_ratio);
Real mu = Hooke::compute_mu(Young_modulus, Poisson_ratio);
this->lambda_field.push_back(lambda);
this->mu_field.push_back(mu);
this->plastic_increment_field.push_back(plastic_increment);
this->stress_threshold_field.push_back(stress_threshold);
const Eigen::Map<const Eigen::Array<Real, DimM * DimM, 1>> strain_map(
eigen_strain.data());
this->eigen_strain_field.push_back(strain_map);
}
/* ---------------------------------------------------------------------- */
template <Dim_t DimS, Dim_t DimM>
void MaterialStochasticPlasticity<DimS, DimM>::set_plastic_increment(
const Ccoord_t<DimS> pixel, const Real increment) {
auto && plastic_increment_map{this->plastic_increment_field.get_map()};
plastic_increment_map[pixel] = increment;
}
/* ---------------------------------------------------------------------- */
template <Dim_t DimS, Dim_t DimM>
void MaterialStochasticPlasticity<DimS, DimM>::set_stress_threshold(
const Ccoord_t<DimS> pixel, const Real threshold) {
auto && stress_threshold_map{this->stress_threshold_field.get_map()};
stress_threshold_map[pixel] = threshold;
}
/* ---------------------------------------------------------------------- */
template <Dim_t DimS, Dim_t DimM>
void MaterialStochasticPlasticity<DimS, DimM>::set_eigen_strain(
const Ccoord_t<DimS> pixel,
Eigen::Ref<Eigen::Matrix<Real, DimM, DimM>> & eigen_strain) {
auto && eigen_strain_map{this->eigen_strain_field.get_map()};
// std::cout << "eigen_strain:\n" << eigen_strain << std::endl;
// std::cout << "eigen_strain_map:\n" << eigen_strain_map[pixel] <<
// std::endl;
eigen_strain_map[pixel] = eigen_strain;
}
/* ---------------------------------------------------------------------- */
template <Dim_t DimS, Dim_t DimM>
const Real & MaterialStochasticPlasticity<DimS, DimM>::get_plastic_increment(
const Ccoord_t<DimS> pixel) {
auto && plastic_increment_map{this->plastic_increment_field.get_map()};
return plastic_increment_map[pixel];
}
/* ---------------------------------------------------------------------- */
template <Dim_t DimS, Dim_t DimM>
const Real & MaterialStochasticPlasticity<DimS, DimM>::get_stress_threshold(
const Ccoord_t<DimS> pixel) {
auto && stress_threshold_map{this->stress_threshold_field.get_map()};
return stress_threshold_map[pixel];
}
/* ---------------------------------------------------------------------- */
template <Dim_t DimS, Dim_t DimM>
const Eigen::Ref<Eigen::Matrix<Real, DimM, DimM>>
MaterialStochasticPlasticity<DimS, DimM>::get_eigen_strain(
const Ccoord_t<DimS> pixel) {
auto && eigen_strain_map{this->eigen_strain_field.get_map()};
return eigen_strain_map[pixel];
}
template <Dim_t DimS, Dim_t DimM>
void MaterialStochasticPlasticity<DimS, DimM>::reset_overloaded_pixels(){
this->overloaded_pixels.clear();
}
template class MaterialStochasticPlasticity<twoD, twoD>;
template class MaterialStochasticPlasticity<twoD, threeD>;
template class MaterialStochasticPlasticity<threeD, threeD>;
} // namespace muSpectre
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