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shape_cohesive_inline_impl.cc
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shape_cohesive_inline_impl.cc
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/**
* @file shape_cohesive_inline_impl.cc
*
* @author Marco Vocialta <marco.vocialta@epfl.ch>
* @author Nicolas Richart <nicolas.richart@epfl.ch>
*
* @date creation: Thu Feb 23 2012
* @date last modification: Fri Jun 13 2014
*
* @brief ShapeCohesive inline implementation
*
* @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/>.
*
*/
/* -------------------------------------------------------------------------- */
/* -------------------------------------------------------------------------- */
inline ShapeLagrange<_ek_cohesive>::ShapeLagrange(const Mesh & mesh,
const ID & id,
const MemoryID & memory_id) :
ShapeFunctions(mesh, id, memory_id),
shapes("shapes_cohesive", id),
shapes_derivatives("shapes_derivatives_cohesive", id) {
AKANTU_DEBUG_IN();
AKANTU_DEBUG_OUT();
}
#define INIT_SHAPE_FUNCTIONS(type) \
setIntegrationPointsByType<type>(integration_points, ghost_type); \
precomputeShapesOnIntegrationPoints<type>(nodes, ghost_type); \
precomputeShapeDerivativesOnIntegrationPoints<type>(nodes, ghost_type);
/* -------------------------------------------------------------------------- */
inline void ShapeLagrange<_ek_cohesive>::initShapeFunctions(const Array<Real> & nodes,
const Matrix<Real> & integration_points,
const ElementType & type,
const GhostType & ghost_type) {
AKANTU_BOOST_COHESIVE_ELEMENT_SWITCH(INIT_SHAPE_FUNCTIONS);
}
/* -------------------------------------------------------------------------- */
inline const Array<Real> & ShapeLagrange<_ek_cohesive>::getShapes(const ElementType & el_type,
const GhostType & ghost_type) const {
return shapes(FEEngine::getInterpolationType(el_type), ghost_type);
}
/* -------------------------------------------------------------------------- */
inline const Array<Real> & ShapeLagrange<_ek_cohesive>::getShapesDerivatives(const ElementType & el_type,
const GhostType & ghost_type) const {
return shapes_derivatives(FEEngine::getInterpolationType(el_type), ghost_type);
}
/* -------------------------------------------------------------------------- */
template <ElementType type>
void ShapeLagrange<_ek_cohesive>::precomputeShapesOnIntegrationPoints(__attribute__((unused)) const Array<Real> & nodes,
GhostType ghost_type) {
AKANTU_DEBUG_IN();
InterpolationType itp_type = ElementClassProperty<type>::interpolation_type;
Matrix<Real> & natural_coords = integration_points(type, ghost_type);
UInt nb_points = natural_coords.cols();
UInt size_of_shapes = ElementClass<type>::getShapeSize();
UInt nb_element = mesh.getConnectivity(type, ghost_type).getSize();;
Array<Real> & shapes_tmp = shapes.alloc(nb_element*nb_points,
size_of_shapes,
itp_type,
ghost_type);
Array<Real>::matrix_iterator shapes_it =
shapes_tmp.begin_reinterpret(ElementClass<type>::getNbNodesPerInterpolationElement(), nb_points,
nb_element);
for (UInt elem = 0; elem < nb_element; ++elem, ++shapes_it) {
Matrix<Real> & N = *shapes_it;
ElementClass<type>::computeShapes(natural_coords,
N);
}
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
template <ElementType type>
void ShapeLagrange<_ek_cohesive>::precomputeShapeDerivativesOnIntegrationPoints(__attribute__((unused)) const Array<Real> & nodes,
GhostType ghost_type) {
AKANTU_DEBUG_IN();
UInt size_of_shapesd = ElementClass<type>::getShapeDerivativesSize();
UInt spatial_dimension = ElementClass<type>::getNaturalSpaceDimension();
UInt nb_nodes_per_element = ElementClass<type>::getNbNodesPerInterpolationElement();
Matrix<Real> natural_coords = this->integration_points(type, ghost_type);
UInt nb_points = natural_coords.cols();
// UInt * elem_val = this->mesh->getConnectivity(type, ghost_type).storage();;
UInt nb_element = this->mesh.getConnectivity(type, ghost_type).getSize();
InterpolationType itp_type = ElementClassProperty<type>::interpolation_type;
Array<Real> & shapes_derivatives_tmp =
this->shapes_derivatives.alloc(nb_element*nb_points,
size_of_shapesd,
itp_type,
ghost_type);
Real * shapesd_val = shapes_derivatives_tmp.storage();
for (UInt elem = 0; elem < nb_element; ++elem) {
Tensor3<Real> B(shapesd_val,
spatial_dimension, nb_nodes_per_element, nb_points);
ElementClass<type>::computeDNDS(natural_coords, B);
shapesd_val += size_of_shapesd*nb_points;
}
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
template <ElementType type, class ReduceFunction>
void ShapeLagrange<_ek_cohesive>::extractNodalToElementField(const Array<Real> & nodal_f,
Array<Real> & elemental_f,
const GhostType & ghost_type,
const Array<UInt> & filter_elements) const {
AKANTU_DEBUG_IN();
UInt nb_nodes_per_itp_element = ElementClass<type>::getNbNodesPerInterpolationElement();
UInt nb_nodes_per_element = ElementClass<type>::getNbNodesPerElement();
UInt nb_degree_of_freedom = nodal_f.getNbComponent();
UInt nb_element = this->mesh.getNbElement(type, ghost_type);
UInt * conn_val = this->mesh.getConnectivity(type, ghost_type).storage();
if(filter_elements != empty_filter) {
nb_element = filter_elements.getSize();
}
elemental_f.resize(nb_element);
Array<Real>::matrix_iterator u_it = elemental_f.begin(nb_degree_of_freedom,
nb_nodes_per_itp_element);
UInt * el_conn;
ReduceFunction reduce_function;
for (UInt el = 0; el < nb_element; ++el, ++u_it) {
Matrix<Real> & u = *u_it;
if(filter_elements != empty_filter) el_conn = conn_val + filter_elements(el) * nb_nodes_per_element;
else el_conn = conn_val + el * nb_nodes_per_element;
// compute the average/difference of the nodal field loaded from cohesive element
for (UInt n = 0; n < nb_nodes_per_itp_element; ++n) {
UInt node_plus = *(el_conn + n);
UInt node_minus = *(el_conn + n + nb_nodes_per_itp_element);
for (UInt d = 0; d < nb_degree_of_freedom; ++d) {
Real u_plus = nodal_f(node_plus, d);
Real u_minus = nodal_f(node_minus, d);
u(d, n) = reduce_function(u_plus, u_minus);
}
}
}
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
template <ElementType type, class ReduceFunction>
void ShapeLagrange<_ek_cohesive>::interpolateOnIntegrationPoints(const Array<Real> &in_u,
Array<Real> &out_uq,
UInt nb_degree_of_freedom,
GhostType ghost_type,
const Array<UInt> & filter_elements) const {
AKANTU_DEBUG_IN();
InterpolationType itp_type = ElementClassProperty<type>::interpolation_type;
AKANTU_DEBUG_ASSERT(this->shapes.exists(itp_type, ghost_type),
"No shapes for the type "
<< this->shapes.printType(itp_type, ghost_type));
UInt nb_nodes_per_element = ElementClass<type>::getNbNodesPerInterpolationElement();
Array<Real> u_el(0, nb_degree_of_freedom * nb_nodes_per_element);
this->extractNodalToElementField<type, ReduceFunction>(in_u, u_el, ghost_type, filter_elements);
this->template interpolateElementalFieldOnIntegrationPoints<type>(u_el, out_uq, ghost_type,
shapes(itp_type, ghost_type),
filter_elements);
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
template <ElementType type, class ReduceFunction>
void ShapeLagrange<_ek_cohesive>::variationOnIntegrationPoints(const Array<Real> &in_u,
Array<Real> &nablauq,
UInt nb_degree_of_freedom,
GhostType ghost_type,
const Array<UInt> & filter_elements) const {
AKANTU_DEBUG_IN();
InterpolationType itp_type = ElementClassProperty<type>::interpolation_type;
AKANTU_DEBUG_ASSERT(this->shapes_derivatives.exists(itp_type, ghost_type),
"No shapes for the type "
<< this->shapes_derivatives.printType(itp_type, ghost_type));
UInt nb_nodes_per_element = ElementClass<type>::getNbNodesPerInterpolationElement();
Array<Real> u_el(0, nb_degree_of_freedom * nb_nodes_per_element);
this->extractNodalToElementField<type, ReduceFunction>(in_u, u_el, ghost_type, filter_elements);
this->template gradientElementalFieldOnIntegrationPoints<type>(u_el, nablauq, ghost_type,
shapes_derivatives(itp_type, ghost_type),
filter_elements);
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
template <ElementType type, class ReduceFunction>
void ShapeLagrange<_ek_cohesive>::computeNormalsOnIntegrationPoints(const Array<Real> &u,
Array<Real> &normals_u,
GhostType ghost_type,
const Array<UInt> & filter_elements) const {
AKANTU_DEBUG_IN();
UInt nb_element = this->mesh.getNbElement(type, ghost_type);
UInt nb_points = this->integration_points(type, ghost_type).cols();
UInt spatial_dimension = this->mesh.getSpatialDimension();
if(filter_elements != empty_filter)
nb_element = filter_elements.getSize();
normals_u.resize(nb_points * nb_element);
Array<Real> tangents_u(nb_element * nb_points,
(spatial_dimension * (spatial_dimension -1)));
this->template variationOnIntegrationPoints<type, ReduceFunction>(u,
tangents_u,
spatial_dimension,
ghost_type,
filter_elements);
Array<Real>::vector_iterator normal = normals_u.begin(spatial_dimension);
Array<Real>::vector_iterator normal_end = normals_u.end(spatial_dimension);
Real * tangent = tangents_u.storage();
if(spatial_dimension == 3)
for (; normal != normal_end; ++normal) {
Math::vectorProduct3(tangent, tangent+spatial_dimension, normal->storage());
(*normal) /= normal->norm();
tangent += spatial_dimension * 2;
}
else if (spatial_dimension == 2)
for (; normal != normal_end; ++normal) {
Vector<Real> a1(tangent, spatial_dimension);
(*normal)(0) = -a1(1);
(*normal)(1) = a1(0);
(*normal) /= normal->norm();
tangent += spatial_dimension;
}
AKANTU_DEBUG_OUT();
}

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