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resolution_augmented_lagrangian.hh
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			/**
			* @file resolution_augmented_lagrangian.hh
			*
			* @author Alejandro M. Aragón <alejandro.aragon@epfl.ch>
			*
			* @date creation: Mon Sep 15 2014
			* @date last modification: Mon Sep 15 2014
			*
			* @brief contact resolution classes
			*
			* @section LICENSE
			*
			* Copyright (©) 2014 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/>.
			*
			*/

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

			#ifndef __AKANTU_RESOLUTION_AUGMENTED_LAGRANGIAN_HH__
			#define __AKANTU_RESOLUTION_AUGMENTED_LAGRANGIAN_HH__

			#include <map>

			#include "search.hh"
			#include "aka_common.hh"
			#include "contact_common.hh"
			#include "aka_array.hh"
			#include "dumpable_inline_impl.hh"
			//#include "dumper_iohelper_tmpl.hh"
			#include "solid_mechanics_model_element.hh"
			#include "aka_optimize.hh"
			#include "parsable.hh"

			#define __LOC__ \
			std::cout << "File " << __FILE__ << ", line " << __LINE__ << std::endl;

			__BEGIN_AKANTU__

			template <int Dim>
			class ContactResolution<Dim, _static,
			_augmented_lagrangian> : public ContactParameters,
			public Parsable {
			typedef SolidMechanicsModel model_type;
			typedef ModelElement<model_type> element_type;

			typedef std::map<UInt, element_type> slave_master_map;
			typedef std::map<UInt, Real> real_map;
			typedef typename real_map::iterator real_iterator;
			typedef std::map<UInt, Real> gap_map;

			typedef Point<Dim> point_type;
			typedef array::Array<1, Real> vector_type;
			typedef array::Array<2, Real> matrix_type;

			model_type &model_;
			slave_master_map sm_;
			real_map areas_, gaps_;
			real_map multipliers_, penalty_;
			size_t uiter_, niter_;
			Array<Real> multiplier_dumper_, pressure_dumper_;
			std::map<UInt, bool> contact_status_;
			std::map<UInt, int> status_change_;

			protected:
			//! Initialize function that's called after the derived Contact's constructor
			virtual void initialize();

			public:
			//! Parameter constructor
			ContactResolution(model_type &m);

			//! Add slave
			void addSlave(UInt s) { sm_[s] = element_type(); }

			//! Add slave-master pair
			void addPair(UInt s, element_type el) { sm_[s] = el; }

			//! Add area to a slave node
			void addArea(UInt n, Real a) {
			if (a != 0.)
			areas_[n] = a;
			}

			//! Implementation of the contact step
			template <ContactImplementationMethod i>
			void solveContactStep(SearchBase *sp) {
			solveContactStepImpl(sp, Int2Type<i>());
			}

			//! Get contact force (sum of Lagrange multipliers)
			Real getForce() {
			Real f = 0.;
			for (auto v : multipliers_)
			f += v.second;
			return f;
			}

			//! Get maximum value of contact pressure
			Real getMaxPressure() {
			Real p = 0.;
			for (auto v : multipliers_) {
			auto slave = v.first;
			auto it = areas_.find(slave);
			if (it != areas_.end())
			p = std::max(p, v.second / it->second); // max(p, lambda/area)
			}
			return p;
			}

			private:
			//! Compute penalty parameter values for each slave node automatically
			void getPenaltyValues();

			//! Add stiffness matrix and force vector contributions due to contact
			bool computeTangentAndResidual(real_map &lambda_new, SearchBase *cp,
			Real &error, Int2Type<_uzawa>);
			bool computeTangentAndResidual(Array<Real> &solution, Array<Real> &rhs,
			SearchBase *cp, Real &error,
			Int2Type<_generalized_newton>);

			//! Implementation of the contact step using Uzawa's method
			void solveContactStepImpl(SearchBase *sp, Int2Type<_uzawa>);

			//! Implementation of the contact step using Uzawa's method
			void solveContactStepImpl(SearchBase *sp, Int2Type<_generalized_newton>);

			protected:
			//! Dump of Paraview files including contact information
			void dump();

			//! Provide standard output of resolution object
			template <int D>
			friend std::ostream &operator<<(
			std::ostream &os,
			const ContactResolution<D, _static, _augmented_lagrangian> &);
			};

			__END_AKANTU__

			#endif /* __AKANTU_RESOLUTION_AUGMENTED_LAGRANGIAN_HH__ */

rAKA/src/contact/resolution/resolution_augmented_lagrangian.hh848f0fd8c83bfeatures/friction_examp…

resolution_augmented_lagrangian.hhView Options

rAKA/src/contact/resolution/resolution_augmented_lagrangian.hh
848f0fd8c83bfeatures/friction_examp…

resolution_augmented_lagrangian.hh
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