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stress_transformations_PK1_impl.hh
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Mon, May 13, 21:07

stress_transformations_PK1_impl.hh
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/**
* @file stress_transformations_PK1_impl.hh
*
* @author Till Junge <till.junge@altermail.ch>
*
* @date 29 Oct 2018
*
* @brief implementation of stress conversion for PK1 stress
*
* 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 µSpectre; see the file COPYING. If not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef SRC_MATERIALS_STRESS_TRANSFORMATIONS_PK1_IMPL_HH_
#define SRC_MATERIALS_STRESS_TRANSFORMATIONS_PK1_IMPL_HH_
#include "common/muSpectre_common.hh"
#include <libmugrid/T4_map_proxy.hh>
namespace muSpectre {
namespace MatTB {
namespace internal {
/* ----------------------------------------------------------------------
*/
/** Specialisation for the transparent case, where we already
have PK1 stress
**/
template <Dim_t Dim, StrainMeasure StrainM>
struct PK1_stress<Dim, StressMeasure::PK1, StrainM>
: public PK1_stress<Dim, StressMeasure::no_stress_,
StrainMeasure::no_strain_> {
//! returns the converted stress
template <class Strain_t, class Stress_t>
inline static decltype(auto) compute(Strain_t && /*dummy*/,
Stress_t && P) {
return std::forward<Stress_t>(P);
}
};
/* ----------------------------------------------------------------------
*/
/** Specialisation for the transparent case, where we already have PK1
stress *and* stiffness is given with respect to the transformation
gradient
**/
template <Dim_t Dim>
struct PK1_stress<Dim, StressMeasure::PK1, StrainMeasure::Gradient>
: public PK1_stress<Dim, StressMeasure::PK1,
StrainMeasure::no_strain_> {
//! base class
using Parent =
PK1_stress<Dim, StressMeasure::PK1, StrainMeasure::no_strain_>;
using Parent::compute;
//! returns the converted stress and stiffness
template <class Strain_t, class Stress_t, class Tangent_t>
inline static decltype(auto) compute(Strain_t && /*dummy*/,
Stress_t && P, Tangent_t && K) {
return std::make_tuple(std::forward<Stress_t>(P),
std::forward<Tangent_t>(K));
}
};
} // namespace internal
} // namespace MatTB
} // namespace muSpectre
#endif // SRC_MATERIALS_STRESS_TRANSFORMATIONS_PK1_IMPL_HH_

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