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ref_elem_meca1d.hh
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/**
* @file ref_elem_meca1d.hh
*
* @author Guillaume Anciaux <guillaume.anciaux@epfl.ch>
* @author Srinivasa Babu Ramisetti <srinivasa.ramisetti@epfl.ch>
*
* @date Tue Aug 19 16:38:14 2014
*
* @brief Reference to elemental DOF in MECA1D
*
* @section LICENSE
*
* Copyright INRIA and CEA
*
* The LibMultiScale is a C++ parallel framework for the multiscale
* coupling methods dedicated to material simulations. This framework
* provides an API which makes it possible to program coupled simulations
* and integration of already existing codes.
*
* This Project was initiated in a collaboration between INRIA Futurs Bordeaux
* within ScAlApplix team and CEA/DPTA Ile de France.
* The project is now continued at the Ecole Polytechnique Fédérale de Lausanne
* within the LSMS/ENAC laboratory.
*
* This software is governed by the CeCILL-C license under French law and
* abiding by the rules of distribution of free software. You can use,
* modify and/ or redistribute the software under the terms of the CeCILL-C
* license as circulated by CEA, CNRS and INRIA at the following URL
* "http://www.cecill.info".
*
* As a counterpart to the access to the source code and rights to copy,
* modify and redistribute granted by the license, users are provided only
* with a limited warranty and the software's author, the holder of the
* economic rights, and the successive licensors have only limited
* liability.
*
* In this respect, the user's attention is drawn to the risks associated
* with loading, using, modifying and/or developing or reproducing the
* software by the user in light of its specific status of free software,
* that may mean that it is complicated to manipulate, and that also
* therefore means that it is reserved for developers and experienced
* professionals having in-depth computer knowledge. Users are therefore
* encouraged to load and test the software's suitability as regards their
* requirements in conditions enabling the security of their systems and/or
* data to be ensured and, more generally, to use and operate it in the
* same conditions as regards security.
*
* The fact that you are presently reading this means that you have had
* knowledge of the CeCILL-C license and that you accept its terms.
*
*/
#ifndef __LIBMULTISCALE_REF_ELEM_MECA1D_HH__
#define __LIBMULTISCALE_REF_ELEM_MECA1D_HH__
/* -------------------------------------------------------------------------- */
#include "mesh_meca1d.hh"
#include "ref_elem_fe.hh"
#include "ref_node_meca1d.hh"
#include "units.hh"
/* -------------------------------------------------------------------------- */
__BEGIN_LIBMULTISCALE__
/* -------------------------------------------------------------------------- */
/**
* Class RefElementLibMesh
* implementation from libmesh of the generic reference to elements
*/
class RefElemMeca1D : public RefElemFE<1, RefElemMeca1D> {
public:
//! iterators may need a privileged access
friend class IteratorElemsMeca1D;
friend class ContainerElemsMeca1D;
static constexpr UInt Dim = 1;
public:
RefElemMeca1D() : mesh(NULL){};
using fields = field_list<_stress, _strain>;
bool operator==(RefElemMeca1D &ref) { return (ref.index == index); };
//! geometric ownership test of a given space poUInt for referenced element
bool contains(Vector<1> x) override {
UInt n1 = mesh->elt[index].n1;
UInt n2 = mesh->elt[index].n2;
if (x[0] <= mesh->p0(n2) && x[0] >= mesh->p0(n1))
return true;
else
return false;
};
//! give the number of nodes connected in referenced element
UInt nNodes() override { return 2; };
//! return the condensed constraUInt tensor for coordinate coord
VectorView<1> stress() {
LM_TOIMPLEMENT;
return VectorView<1>(nullptr);
};
//! return the condensed deformation tensor for coordinate coord
VectorView<1> strain() {
LM_TOIMPLEMENT;
return VectorView<1>(nullptr);
};
//! function that computes the nodal shape values for a given element at a
//! given space point
template <typename Vec>
void computeShapes(std::vector<Real> &target, Vec &&X) {
target.clear();
UInt n1 = mesh->elt[index].n1;
UInt n2 = mesh->elt[index].n2;
Real contrib = (X[0] - mesh->p0(n1)) / (mesh->p0(n2) - mesh->p0(n1));
target.push_back(1 - contrib);
target.push_back(contrib);
}
//! return the local indexes (in DOF vector) for connected nodes
std::vector<UInt> localIndexes() override {
std::vector<UInt> nodes;
UInt n1 = mesh->elt[index].n1;
UInt n2 = mesh->elt[index].n2;
nodes.push_back(n1);
nodes.push_back(n2);
return nodes;
}
//! return the gloabal indexes (in DOF vector) for connected nodes
std::vector<UInt> globalIndexes() override { return localIndexes(); }
//! return a ref to the i-est node
RefNodeMeca1D &getNode(UInt i);
//! get potential energy of the element
Real getEPot() override {
UInt n1 = mesh->elt[index].n1;
UInt n2 = mesh->elt[index].n2;
Real disp = mesh->u(n2) - mesh->u(n1);
return 0.5 * mesh->getE() * disp * disp / mesh->elementSize();
}
//! get kinetic energy of the element
Real getEKin() override {
UInt n1 = mesh->elt[index].n1;
UInt n2 = mesh->elt[index].n2;
Real h = mesh->elementSize();
Real v1 = mesh->v(n1);
Real v2 = mesh->v(n2);
Real velMag = mesh->getRho() * 0.25 * (v1 * v1 + v2 * v2);
return code_unit_system.mvv2e * h * velMag;
}
//! get thermal energy of the element
Real getEThermal() override { LM_TOIMPLEMENT; };
protected:
//! set the mesh pointer
void setMesh(std::shared_ptr<MeshMeca1D> ptr) {
mesh = ptr;
ref_node.setMesh(ptr);
};
//! set the index of referenced element
void setIndex(UInt i) { index = i; };
/* ------------------------------------------------------------------------ */
/* Class Members */
/* ------------------------------------------------------------------------ */
protected:
//! mesh pointer
std::shared_ptr<MeshMeca1D> mesh;
//! referenced index for accessibility
UInt index;
//! a reference to a node
RefNodeMeca1D ref_node;
};
/* -------------------------------------------------------------------------- */
inline RefNodeMeca1D &RefElemMeca1D::getNode(UInt i) {
UInt n;
switch (i) {
case 0:
n = mesh->elt[index].n1;
break;
case 1:
n = mesh->elt[index].n2;
break;
default:
LM_FATAL("invalid index");
}
ref_node.setIndex(n);
return ref_node;
}
/* -------------------------------------------------------------------------- */
__END_LIBMULTISCALE__
#endif /* __LIBMULTISCALE_REF_ELEM_MECA1D_HH__ */

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