Page MenuHomec4science
Files F61332121

solver_common.hh
No OneTemporary
Actions

File Metadata

Created
Mon, May 6, 00:24

solver_common.hh
View Options

/**
* @file solver_common.hh
*
* @author Till Junge <till.junge@altermail.ch>
*
* @date 28 Dec 2017
*
* @brief Errors raised by solvers and other common utilities
*
* Copyright © 2017 Till Junge
*
* µSpectre is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser 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 Lesser 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.
*/
#ifndef SRC_SOLVER_SOLVER_COMMON_HH_
#define SRC_SOLVER_SOLVER_COMMON_HH_
#include "common/common.hh"
#include "common/tensor_algebra.hh"
#include <Eigen/Dense>
#include <stdexcept>
namespace muSpectre {
/**
* emulates scipy.optimize.OptimizeResult
*/
struct OptimizeResult {
//! Strain ε or Gradient F at solution
Eigen::ArrayXXd grad;
//! Cauchy stress σ or first Piola-Kirchhoff stress P at solution
Eigen::ArrayXXd stress;
//! whether or not the solver exited successfully
bool success;
//! Termination status of the optimizer. Its value depends on the
//! underlying solver. Refer to message for details.
Int status;
//! Description of the cause of the termination.
std::string message;
//! number of iterations
Uint nb_it;
//! number of cell evaluations
Uint nb_fev;
//! continuum mechanic flag
Formulation formulation;
};
/**
* Field type that solvers expect gradients to be expressed in
*/
template <Dim_t Dim>
using Grad_t = Matrices::Tens2_t<Dim>;
/**
* multiple increments can be submitted at once (useful for
* path-dependent materials)
*/
template <Dim_t Dim>
using GradIncrements =
std::vector<Grad_t<Dim>, Eigen::aligned_allocator<Grad_t<Dim>>>;
/* ---------------------------------------------------------------------- */
class SolverError : public std::runtime_error {
using runtime_error::runtime_error;
};
/* ---------------------------------------------------------------------- */
class ConvergenceError : public SolverError {
using SolverError::SolverError;
};
/* ---------------------------------------------------------------------- */
/**
* check whether a strain is symmetric, for the purposes of small
* strain problems
*/
bool check_symmetry(const Eigen::Ref<const Eigen::ArrayXXd> & eps,
Real rel_tol = 1e-8);
} // namespace muSpectre
#endif // SRC_SOLVER_SOLVER_COMMON_HH_

Event Timeline

c4science · Help