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solid_mechanics_model_cohesive_inline_impl.cc
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			/**
			* @file solid_mechanics_model_cohesive_inline_impl.cc
			*
			* @author Mauro Corrado <mauro.corrado@epfl.ch>
			*
			* @date Thu Feb 26 14:23:45 2015
			*
			* @brief Implementation of inline functions for the Cohesive element model
			*
			* @section LICENSE
			*
			* Copyright (©) 2010-2011 EPFL (Ecole Polytechnique Fédérale de Lausanne)
			* Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)
			*
			* Akantu 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 of the License, or (at your option) any
			* later version.
			*
			* Akantu 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 Lesser General Public License for more
			* details.
			*
			* You should have received a copy of the GNU Lesser General Public License
			* along with Akantu. If not, see <http://www.gnu.org/licenses/>.
			*
			*/

			/* -------------------------------------------------------------------------- */

			/* -------------------------------------------------------------------------- */
			#include <algorithm>
			#include "material_cohesive.hh"

			#ifndef __AKANTU_SOLID_MECHANICS_MODEL_COHESIVE_INLINE_IMPL_CC__
			#define __AKANTU_SOLID_MECHANICS_MODEL_COHESIVE_INLINE_IMPL_CC__

			__BEGIN_AKANTU__



			/* -------------------------------------------------------------------------- */
			template<SolveConvergenceMethod cmethod, SolveConvergenceCriteria criteria>
			bool SolidMechanicsModelCohesive::solveStepCohesive(Real tolerance,
			Real & error,
			UInt max_iteration,
			bool load_reduction,
			Real tol_increase_factor,
			bool do_not_factorize) {

			EventManager::sendEvent(SolidMechanicsModelEvent::BeforeSolveStepEvent(method));
			this->implicitPred();

			bool insertion_new_element = true;
			bool converged = false;
			Array<Real> * displacement_tmp = NULL;
			Array<Real> * velocity_tmp = NULL;
			Array<Real> * acceleration_tmp = NULL;
			StaticCommunicator & comm = StaticCommunicator::getStaticCommunicator();
			Int prank = comm.whoAmI();

			/// Loop for the insertion of new cohesive elements
			while (insertion_new_element) {

			if (is_extrinsic) {
			/**
			* If in extrinsic the solution of the previous incremental step
			* is saved in temporary arrays created for displacements,
			* velocities and accelerations. Such arrays are used to find
			* the solution with the Newton-Raphson scheme (this is done by
			* pointing the pointer "displacement" to displacement_tmp). In
			* this way, inside the array "displacement" is kept the
			* solution of the previous incremental step, and in
			* "displacement_tmp" is saved the current solution.
			*/

			Array<Real> * tmp_swap;

			if(!displacement_tmp) {
			displacement_tmp = new Array<Real>(*(this->displacement));
			} else {
			displacement_tmp->resize(this->displacement->getSize());
			displacement_tmp->copy(*(this->displacement));
			}
			tmp_swap = displacement_tmp;
			displacement_tmp = this->displacement;
			this->displacement = tmp_swap;

			if(!velocity_tmp) {
			velocity_tmp = new Array<Real>(*(this->velocity));
			} else {
			velocity_tmp->resize(this->velocity->getSize());
			velocity_tmp->copy(*(this->velocity));
			}
			tmp_swap = velocity_tmp;
			velocity_tmp = this->velocity;
			this->velocity = tmp_swap;

			if(!acceleration_tmp) {
			acceleration_tmp = new Array<Real>(*(this->acceleration));
			} else {
			acceleration_tmp->resize(this->acceleration->getSize());
			acceleration_tmp->copy(*(this->acceleration));
			}
			tmp_swap = acceleration_tmp;
			acceleration_tmp = this->acceleration;
			this->acceleration = tmp_swap;
			}

			this->updateResidual();

			AKANTU_DEBUG_ASSERT(stiffness_matrix != NULL,
			"You should first initialize the implicit solver and assemble the stiffness matrix");

			bool need_factorize = !do_not_factorize;

			if (method ==_implicit_dynamic) {
			AKANTU_DEBUG_ASSERT(mass_matrix != NULL,
			"You should first initialize the implicit solver and assemble the mass matrix");
			}

			switch (cmethod) {
			case _scm_newton_raphson_tangent:
			case _scm_newton_raphson_tangent_not_computed:
			break;
			case _scm_newton_raphson_tangent_modified:
			this->assembleStiffnessMatrix();
			break;
			default:
			AKANTU_DEBUG_ERROR("The resolution method " << cmethod << " has not been implemented!");
			}

			UInt iter = 0;
			converged = false;
			error = 0.;
			if(criteria == _scc_residual) {
			converged = this->testConvergence<criteria> (tolerance, error);
			if(converged) return converged;
			}

			/// Loop to solve the nonlinear system
			do {
			if (cmethod == _scm_newton_raphson_tangent)
			this->assembleStiffnessMatrix();

			solve<NewmarkBeta::_displacement_corrector> (*increment, 1., need_factorize);

			this->implicitCorr();

			this->updateResidual();

			converged = this->testConvergence<criteria> (tolerance, error);

			iter++;
			AKANTU_DEBUG_INFO("[" << criteria << "] Convergence iteration "
			<< std::setw(std::log10(max_iteration)) << iter
			<< ": error " << error << (converged ? " < " : " > ") << tolerance);

			switch (cmethod) {
			case _scm_newton_raphson_tangent:
			need_factorize = true;
			break;
			case _scm_newton_raphson_tangent_not_computed:
			case _scm_newton_raphson_tangent_modified:
			need_factorize = false;
			break;
			default:
			AKANTU_DEBUG_ERROR("The resolution method " << cmethod << " has not been implemented!");
			}

			} while (!converged && iter < max_iteration);


			/**
			* This is to save the obtained result and proceed with the
			* simulation even if the error is higher than the pre-fixed
			* tolerance. This is done only after loading reduction
			* (load_reduction = true).
			*/
			if (load_reduction && (error < tolerance * tol_increase_factor)) converged = true;

			if (converged) {
			// EventManager::sendEvent(SolidMechanicsModelEvent::AfterSolveStepEvent(method));
			// !!! add sendEvent to call computeCauchyStress !!!!

			if (prank==0){
			std::cout << "Error after convergence: " << error << std::endl;
			std::cout << "no. of iterations: " << iter << std::endl;
			}
			} else if(iter == max_iteration) {
			if (prank==0){
			AKANTU_DEBUG_WARNING("[" << criteria << "] Convergence not reached after "
			<< std::setw(std::log10(max_iteration)) << iter <<
			" iteration" << (iter == 1 ? "" : "s") << "!" << std::endl);
			std::cout << "Error after NON convergence: " << error << std::endl;
			}
			}

			if (is_extrinsic) {
			/**
			* If is extrinsic the pointer "displacement" is moved back to
			* the array displacement. In this way, the array displacement is
			* correctly resized during the checkCohesiveStress function (in
			* case new cohesive elements are added). This is possible
			* because the procedure called by checkCohesiveStress does not
			* use the displacement field (the correct one is now stored in
			* displacement_tmp), but directly the stress field that is
			* already computed.
			*/
			Array<Real> * tmp_swap;

			tmp_swap = displacement_tmp;
			displacement_tmp = this->displacement;
			this->displacement = tmp_swap;

			tmp_swap = velocity_tmp;
			velocity_tmp = this->velocity;
			this->velocity = tmp_swap;

			tmp_swap = acceleration_tmp;
			acceleration_tmp = this->acceleration;
			this->acceleration = tmp_swap;

			/// If convergence is reached, call checkCohesiveStress in order
			/// to check if cohesive elements have to be introduced
			if (converged){

			UInt new_cohesive_elements = checkCohesiveStress();

			if(new_cohesive_elements == 0){
			insertion_new_element = false;
			} else {
			insertion_new_element = true;
			if (prank==0)
			std::cout << "No. cohesive elements inserted = " << new_cohesive_elements << std::endl;
			}
			}
			}


			if (!converged && load_reduction)
			insertion_new_element = false;

			/**
			* If convergence is not reached, there is the possibility to
			* return back to the main file and reduce the load. Before doing
			* this, a pre-fixed value as to be defined for the parameter
			* delta_max of the cohesive elements introduced in the current
			* incremental step. This is done by calling the function
			* checkDeltaMax.
			*/
			if (!converged) {
			insertion_new_element = false;

			for (UInt m = 0; m < materials.size(); ++m) {
			try {
			MaterialCohesive & mat = dynamic_cast<MaterialCohesive &>(*materials[m]);
			mat.checkDeltaMax(_not_ghost);
			} catch(std::bad_cast&) { }
			}

			}

			} //end loop for the insertion of new cohesive elements

			/**
			* When the solution to the current incremental step is computed (no
			* more cohesive elements have to be introduced), call the function
			* to compute the energies.
			*/
			if ((is_extrinsic && converged)) {

			for(UInt m = 0; m < materials.size(); ++m) {
			try {
			MaterialCohesive & mat = dynamic_cast<MaterialCohesive &>(*materials[m]);
			mat.computeEnergies();
			} catch (std::bad_cast & bce) { }
			}

			EventManager::sendEvent(SolidMechanicsModelEvent::AfterSolveStepEvent(method));

			/**
			* The function resetVariables is necessary to correctly set a
			* variable that permit to decrease locally the penalty parameter
			* for compression.
			*/
			for (UInt m = 0; m < materials.size(); ++m) {
			try {
			MaterialCohesive & mat = dynamic_cast<MaterialCohesive &>(*materials[m]);
			mat.resetVariables(_not_ghost);
			} catch(std::bad_cast&) { }
			}

			/// The correct solution is saved
			this->displacement->copy(*displacement_tmp);
			this->velocity ->copy(*velocity_tmp);
			this->acceleration->copy(*acceleration_tmp);

			delete displacement_tmp;
			delete velocity_tmp;
			delete acceleration_tmp;

			}

			return insertion_new_element;

			}

			__END_AKANTU__

			#if defined (AKANTU_PARALLEL_COHESIVE_ELEMENT)
			# include "solid_mechanics_model_cohesive_parallel_inline_impl.cc"
			#endif

			#endif /* __AKANTU_SOLID_MECHANICS_MODEL_COHESIVE_INLINE_IMPL_CC__ */

rAKA/src/model/solid_mechanics/solid_mechanics_model_cohesive/solid_mechanics_model_cohesive_inline_impl.cc1182b6d36e5efeatures/improved…

solid_mechanics_model_cohesive_inline_impl.ccView Options

rAKA/src/model/solid_mechanics/solid_mechanics_model_cohesive/solid_mechanics_model_cohesive_inline_impl.cc
1182b6d36e5efeatures/improved…

solid_mechanics_model_cohesive_inline_impl.cc
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