contact_mechanics_model.cc
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Created: Sun, May 12, 12:09

contact_mechanics_model.cc
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	/**
	* @file coontact_mechanics_model.cc
	*
	* @author Mohit Pundir <mohit.pundir@epfl.ch>
	*
	* @date creation: Tue May 08 2012
	* @date last modification: Wed Feb 21 2018
	*
	* @brief Contact mechanics model
	*
	* @section LICENSE
	*
	* Copyright (©) 2010-2018 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 "contact_mechanics_model.hh"
	#include "integrator_gauss.hh"
	#include "shape_lagrange.hh"

	#include "dumpable_inline_impl.hh"
	#ifdef AKANTU_USE_IOHELPER
	#include "dumper_iohelper_paraview.hh"
	#endif

	/* -------------------------------------------------------------------------- */
	#include <algorithm>
	/* -------------------------------------------------------------------------- */


	namespace akantu {

	ContactMechanicsModel::ContactMechanicsModel( Mesh & mesh, UInt dim, const ID & id,
	const MemoryID & memory_id,
	const ModelType model_type)
	: Model(mesh, model_type, dim, id, memory_id) {

	AKANTU_DEBUG_IN();

	this->registerFEEngineObject<MyFEEngineType>("ContactMechanicsModel", mesh,
	Model::spatial_dimension);
	#if defined(AKANTU_USE_IOHELPER)
	this->mesh.registerDumper<DumperParaview>("contact_mechanics", id, true);
	this->mesh.addDumpMeshToDumper("contact_mechanics", mesh,
	Model::spatial_dimension, _not_ghost,
	_ek_regular);
	#endif

	this->initDOFManager();

	this->registerDataAccessor(*this);

	this->detector = std::make_unique<ContactDetector>(this->mesh, id + ":contact_detector");

	AKANTU_DEBUG_OUT();

	}

	/* -------------------------------------------------------------------------- */
	ContactMechanicsModel::~ContactMechanicsModel() {
	AKANTU_DEBUG_IN();

	AKANTU_DEBUG_OUT();
	}

	/* -------------------------------------------------------------------------- */
	void ContactMechanicsModel::initFullImpl(const ModelOptions & options) {

	Model::initFullImpl(options);

	// initalize the resolutions
	if (this->parser.getLastParsedFile() != "") {
	this->instantiateResolutions();
	}

	this->initResolutions();

	}

	/* -------------------------------------------------------------------------- */
	void ContactMechanicsModel::instantiateResolutions() {
	ParserSection model_section;
	bool is_empty;
	std::tie(model_section, is_empty) = this->getParserSection();

	if (not is_empty) {
	auto model_resolutions = model_section.getSubSections(ParserType::_contact_resolution);
	for (const auto & section : model_resolutions) {
	this->registerNewResolution(section);
	}
	}

	auto sub_sections = this->parser.getSubSections(ParserType::_contact_resolution);
	for (const auto & section : sub_sections) {
	this->registerNewResolution(section);
	}

	if (resolutions.empty())
	AKANTU_EXCEPTION("No contact resolutions where instantiated for the model"
	<< getID());
	are_resolutions_instantiated = true;
	}

	/* -------------------------------------------------------------------------- */
	Resolution &
	ContactMechanicsModel::registerNewResolution(const ParserSection & section) {
	std::string res_name;
	std::string res_type = section.getName();
	std::string opt_param = section.getOption();

	try {
	std::string tmp = section.getParameter("name");
	res_name = tmp; /** this can seem weird, but there is an ambiguous operator
	* overload that i couldn't solve. @todo remove the
	* weirdness of this code
	*/
	} catch (debug::Exception &) {
	AKANTU_ERROR("A contact resolution of type \'"
	<< res_type
	<< "\' in the input file has been defined without a name!");
	}
	Resolution & res = this->registerNewResolution(res_name, res_type, opt_param);

	res.parseSection(section);

	return res;
	}

	/* -------------------------------------------------------------------------- */
	Resolution & ContactMechanicsModel::registerNewResolution(const ID & res_name,
	const ID & res_type,
	const ID & opt_param) {
	AKANTU_DEBUG_ASSERT(resolutions_names_to_id.find(res_name) ==
	resolutions_names_to_id.end(),
	"A resolution with this name '"
	<< res_name << "' has already been registered. "
	<< "Please use unique names for resolutions");

	UInt res_count = resolutions.size();
	resolutions_names_to_id[res_name] = res_count;

	std::stringstream sstr_res;
	sstr_res << this->id << ":" << res_count << ":" << res_type;
	ID res_id = sstr_res.str();

	std::unique_ptr<Resolution> resolution = ResolutionFactory::getInstance().allocate(
	res_type, spatial_dimension, opt_param, *this, res_id);

	resolutions.push_back(std::move(resolution));

	return *(resolutions.back());
	}

	/* -------------------------------------------------------------------------- */
	void ContactMechanicsModel::initResolutions() {
	AKANTU_DEBUG_ASSERT(resolutions.size() != 0, "No resolutions to initialize !");

	if (!are_resolutions_instantiated)
	instantiateResolutions();

	// \TODO check if each resolution needs a initResolution() method
	}

	/* -------------------------------------------------------------------------- */
	void ContactMechanicsModel::initModel() {
	getFEEngine().initShapeFunctions(_not_ghost);
	getFEEngine().initShapeFunctions(_ghost);
	}


	/* -------------------------------------------------------------------------- */
	FEEngine & ContactMechanicsModel::getFEEngineBoundary(const ID & name) {
	return dynamic_cast<FEEngine &>(
	getFEEngineClassBoundary<MyFEEngineType>(name));
	}



	/* -------------------------------------------------------------------------- */
	void ContactMechanicsModel::initSolver(TimeStepSolverType time_step_solver_type,
	NonLinearSolverType) {
	DOFManager & dof_manager = this->getDOFManager();

	this->allocNodalField(this->contact_force, spatial_dimension,
	"contact_force");

	if (!dof_manager.hasDOFs("displacement")) {
	dof_manager.registerDOFs("displacement", *this->contact_force, _dst_nodal);
	}
	}


	/* -------------------------------------------------------------------------- */
	std::tuple<ID, TimeStepSolverType>
	ContactMechanicsModel::getDefaultSolverID(const AnalysisMethod & method) {

	switch (method) {
	case _explicit_contact: {
	return std::make_tuple("explicit_contact", _tsst_dynamic);
	}
	case _implicit_contact: {
	return std::make_tuple("implicit_contact", _tsst_static);
	}
	default:
	return std::make_tuple("unkown", _tsst_not_defined);
	}
	}

	/* -------------------------------------------------------------------------- */
	ModelSolverOptions ContactMechanicsModel::getDefaultSolverOptions(
	const TimeStepSolverType & type ) const {
	ModelSolverOptions options;

	switch (type) {
	case _tsst_dynamic: {
	options.non_linear_solver_type = _nls_newton_raphson;
	options.integration_scheme_type["displacement"] = _ist_pseudo_time;
	options.solution_type["displacement"] = IntegrationScheme::_not_defined;
	break;
	}
	case _tsst_static: {
	options.non_linear_solver_type = _nls_newton_raphson;
	options.integration_scheme_type["displacement"] = _ist_pseudo_time;
	options.solution_type["displacement"] = IntegrationScheme::_not_defined;
	break;
	}
	default:
	AKANTU_EXCEPTION(type << " is not a valid time step solver type");
	break;
	}

	return options;
	}

	/* -------------------------------------------------------------------------- */
	void ContactMechanicsModel::assembleResidual() {
	AKANTU_DEBUG_IN();

	/* ------------------------------------------------------------------------ */
	// computes the internal forces
	this->assembleInternalForces();

	/* ------------------------------------------------------------------------ */
	this->getDOFManager().assembleToResidual("displacement",
	*this->contact_force, 1);

	AKANTU_DEBUG_OUT();
	}

	/* -------------------------------------------------------------------------- */
	void ContactMechanicsModel::assembleInternalForces() {
	AKANTU_DEBUG_IN();

	AKANTU_DEBUG_INFO("Assemble the contact forces");

	// assemble the forces due to local stresses
	auto assemble = [&] (auto && ghost_type) {
	for (auto & resolution : resolutions) {
	resolution->assembleInternalForces(ghost_type);
	}
	};

	AKANTU_DEBUG_INFO("Assemble residual for local elements");
	assemble(_not_ghost);

	// assemble the stresses due to ghost elements
	AKANTU_DEBUG_INFO("Assemble residual for ghost elements");
	assemble(_ghost);

	AKANTU_DEBUG_OUT();

	}

	/* -------------------------------------------------------------------------- */
	void ContactMechanicsModel::search() {
	this->detector->search(this->contact_map);
	}

	/* -------------------------------------------------------------------------- */
	void ContactMechanicsModel::printself(std::ostream & stream, int indent) const {
	std::string space;
	for (Int i = 0; i < indent; i++, space += AKANTU_INDENT)
	;

	stream << space << "Contact Mechanics Model [" << std::endl;
	stream << space << " + id : " << id << std::endl;
	stream << space << " + spatial dimension : " << Model::spatial_dimension
	<< std::endl;
	stream << space << " + fem [" << std::endl;
	getFEEngine().printself(stream, indent + 2);
	stream << space << AKANTU_INDENT << "]" << std::endl;

	stream << space << " + resolutions [" << std::endl;
	for (auto & resolution : resolutions) {
	resolution->printself(stream, indent + 1);
	}
	stream << space << AKANTU_INDENT << "]" << std::endl;

	stream << space << "]" << std::endl;
	}


	/* -------------------------------------------------------------------------- */
	MatrixType ContactMechanicsModel::getMatrixType(const ID & matrix_id) {
	// \TODO correct it for contact mechanics model, only one type of matrix
	if (matrix_id == "K")
	return _symmetric;

	return _mt_not_defined;
	}

	/* -------------------------------------------------------------------------- */
	void ContactMechanicsModel::assembleMatrix(const ID & matrix_id) {
	if (matrix_id == "K") {
	this->assembleStiffnessMatrix();
	}
	}

	/* -------------------------------------------------------------------------- */
	void ContactMechanicsModel::assembleStiffnessMatrix() {
	AKANTU_DEBUG_IN();

	AKANTU_DEBUG_INFO("Assemble the new stiffness matrix");

	if (!this->getDOFManager().hasMatrix("K")) {
	this->getDOFManager().getNewMatrix("K", getMatrixType("K"));
	}

	this->getDOFManager().clearMatrix("K");

	for (auto & resolution : resolutions) {
	resolution->assembleStiffnessMatrix(_not_ghost);
	}
	}

	/* -------------------------------------------------------------------------- */
	void ContactMechanicsModel::assembleLumpedMatrix(const ID & matrix_id) {
	AKANTU_TO_IMPLEMENT();
	}

	/* -------------------------------------------------------------------------- */
	#ifdef AKANTU_USE_IOHELPER
	dumper::Field *
	ContactMechanicsModel::createNodalFieldReal(const std::string & field_name,
	const std::string & group_name,
	bool padding_flag) {

	std::map<std::string, Array<Real> *> real_nodal_fields;
	real_nodal_fields["contact_force"] = this->contact_force;

	dumper::Field * field = nullptr;
	if (padding_flag)
	field = this->mesh.createNodalField(real_nodal_fields[field_name],
	group_name, 3);
	else
	field =
	this->mesh.createNodalField(real_nodal_fields[field_name], group_name);

	return field;
	}

	#else
	/* -------------------------------------------------------------------------- */
	dumper::Field * ContactMechanicsModel::createNodalFieldReal(
	__attribute__((unused)) const std::string & field_name,
	__attribute__((unused)) const std::string & group_name,
	__attribute__((unused)) bool padding_flag) {
	return nullptr;
	}

	#endif

	/* -------------------------------------------------------------------------- */
	void ContactMechanicsModel::dump(const std::string & dumper_name) {
	mesh.dump(dumper_name);
	}

	/* -------------------------------------------------------------------------- */
	void ContactMechanicsModel::dump(const std::string & dumper_name, UInt step) {
	mesh.dump(dumper_name, step);
	}

	/* ------------------------------------------------------------------------- */
	void ContactMechanicsModel::dump(const std::string & dumper_name, Real time,
	UInt step) {
	mesh.dump(dumper_name, time, step);
	}

	/* -------------------------------------------------------------------------- */
	void ContactMechanicsModel::dump() { mesh.dump(); }

	/* -------------------------------------------------------------------------- */
	void ContactMechanicsModel::dump(UInt step) { mesh.dump(step); }

	/* -------------------------------------------------------------------------- */
	void ContactMechanicsModel::dump(Real time, UInt step) { mesh.dump(time, step); }


	/* -------------------------------------------------------------------------- */
	UInt ContactMechanicsModel::getNbData(const Array<Element> & elements,
	const SynchronizationTag & tag) const {
	AKANTU_DEBUG_IN();

	UInt size = 0;
	UInt nb_nodes_per_element = 0;

	for (const Element & el : elements) {
	nb_nodes_per_element += Mesh::getNbNodesPerElement(el.type);
	}


	AKANTU_DEBUG_OUT();
	return size;
	}

	/* -------------------------------------------------------------------------- */
	void ContactMechanicsModel::packData(CommunicationBuffer & buffer,
	const Array<Element> & elements,
	const SynchronizationTag & tag) const {
	AKANTU_DEBUG_IN();

	AKANTU_DEBUG_OUT();
	}

	/* -------------------------------------------------------------------------- */
	void ContactMechanicsModel::unpackData(CommunicationBuffer & buffer,
	const Array<Element> & elements,
	const SynchronizationTag & tag) {
	AKANTU_DEBUG_IN();


	AKANTU_DEBUG_OUT();
	}

	/* -------------------------------------------------------------------------- */
	UInt ContactMechanicsModel::getNbData(const Array<UInt> & dofs,
	const SynchronizationTag & tag) const {
	AKANTU_DEBUG_IN();

	UInt size = 0;
	// UInt nb_nodes = mesh.getNbNodes();

	AKANTU_DEBUG_OUT();
	return size * dofs.size();
	}

	/* -------------------------------------------------------------------------- */
	void ContactMechanicsModel::packData(CommunicationBuffer & buffer,
	const Array<UInt> & dofs,
	const SynchronizationTag & tag) const {
	AKANTU_DEBUG_IN();


	AKANTU_DEBUG_OUT();
	}

	/* -------------------------------------------------------------------------- */
	void ContactMechanicsModel::unpackData(CommunicationBuffer & buffer,
	const Array<UInt> & dofs,
	const SynchronizationTag & tag) {
	AKANTU_DEBUG_IN();


	AKANTU_DEBUG_OUT();
	}


	} // namespace akantu

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