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material_hyper_elasto_plastic1.cc
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Wed, Jun 26, 12:06

material_hyper_elasto_plastic1.cc
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/**
* @file material_hyper_elasto_plastic1.cc
*
* @author Till Junge <till.junge@epfl.ch>
*
* @date 21 Feb 2018
*
* @brief implementation for MaterialHyperElastoPlastic1
*
* Copyright © 2018 Till Junge
*
* 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 GNU Emacs; see the file COPYING. If not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include "materials/material_hyper_elasto_plastic1.hh"
namespace muSpectre {
//----------------------------------------------------------------------------//
template <Dim_t DimS, Dim_t DimM>
MaterialHyperElastoPlastic1<DimS, DimM>::
MaterialHyperElastoPlastic1(std::string name, Real young, Real poisson,
Real tau_y0, Real H)
: Parent{name},
plast_flow_field("cumulated plastic flow εₚ", this->internal_fields),
F_prev_field("Previous placement gradient Fᵗ", this->internal_fields),
be_prev_field("Previous left Cauchy-Green deformation bₑᵗ",
this->internal_fields),
young{young}, poisson{poisson},
lambda{Hooke::compute_lambda(young, poisson)},
mu{Hooke::compute_mu(young, poisson)},
K{Hooke::compute_K(young, poisson)},
tau_y0{tau_y0}, H{H},
// the factor .5 comes from equation (18) in Geers 2003
// (https://doi.org/10.1016/j.cma.2003.07.014)
C{0.5*Hooke::compute_C_T4(lambda, mu)},
internal_variables{F_prev_field.get_map(), be_prev_field.get_map(),
plast_flow_field.get_map()}
{}
/* ---------------------------------------------------------------------- */
template <Dim_t DimS, Dim_t DimM>
void MaterialHyperElastoPlastic1<DimS, DimM>::save_history_variables() {
this->plast_flow_field.cycle();
this->F_prev_field.cycle();
this->be_prev_field.cycle();
}
/* ---------------------------------------------------------------------- */
template <Dim_t DimS, Dim_t DimM>
void MaterialHyperElastoPlastic1<DimS, DimM>::initialise(bool /*stiffness*/) {
Parent::initialise();
this->F_prev_field.get_map().current() =
Eigen::Matrix<Real, DimM, DimM>::Identity();
this->be_prev_field.get_map().current() =
Eigen::Matrix<Real, DimM, DimM>::Identity();
this->save_history_variables();
}
template class MaterialHyperElastoPlastic1< twoD, twoD>;
template class MaterialHyperElastoPlastic1< twoD, threeD>;
template class MaterialHyperElastoPlastic1<threeD, threeD>;
} // muSpectre

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