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material_igfem_saw_tooth_damage_inline_impl.hh
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Wed, May 15, 20:07

material_igfem_saw_tooth_damage_inline_impl.hh
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/**
* @file material_igfem_saw_tooth_damage_inline_impl.hh
*
* @author Aurelia Isabel Cuba Ramos <aurelia.cubaramos@epfl.ch>
*
*
* @brief Implementation of inline functions of the squentially linear
* saw-tooth damage model for IGFEM elements
*
*
* Copyright (©) 2010-2012, 2014 EPFL (Ecole Polytechnique Fédérale de Lausanne)
* Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)
*
*/
/* -------------------------------------------------------------------------- */
template <UInt spatial_dimension>
inline void
MaterialIGFEMSawToothDamage<spatial_dimension>::computeDamageAndStressOnQuad(
Matrix<Real> & sigma, Real & dam) {
sigma *= 1 - dam;
}
/* -------------------------------------------------------------------------- */
template <UInt spatial_dimension>
UInt MaterialIGFEMSawToothDamage<spatial_dimension>::updateDamage(
UInt quad_index, const Real eq_stress, ElementType el_type,
GhostType ghost_type) {
AKANTU_DEBUG_ASSERT(prescribed_dam > 0.,
"Your prescribed damage must be greater than zero");
Array<Real> & dam = this->damage(el_type, ghost_type);
Real & dam_on_quad = dam(quad_index);
/// check if damage occurs
if (equivalent_stress(el_type, ghost_type)(quad_index) >=
(1 - dam_tolerance) * norm_max_equivalent_stress) {
/// damage the entire sub-element -> get the element index
UInt el_index =
quad_index / this->element_filter(el_type, ghost_type).getSize();
UInt nb_quads = this->fem->getNbIntegrationPoints(el_type, ghost_type);
UInt start_idx = el_index * nb_quads;
Array<UInt> & sub_mat = this->sub_material(el_type, ghost_type);
UInt damaged_quads = 0;
if (dam_on_quad < dam_threshold) {
for (UInt q = 0; q < nb_quads; ++q, ++start_idx) {
if (sub_mat(start_idx)) {
dam(start_idx) += prescribed_dam;
damaged_quads += 1;
}
}
} else {
for (UInt q = 0; q < nb_quads; ++q, ++start_idx) {
if (sub_mat(start_idx)) {
dam(start_idx) += max_damage;
damaged_quads += 1;
}
}
}
return damaged_quads;
}
return 0;
}
/* -------------------------------------------------------------------------- */

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