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py_contact_mechanics_model.cc
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py_contact_mechanics_model.cc
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/**
* Copyright (©) 2019-2023 EPFL (Ecole Polytechnique Fédérale de Lausanne)
* Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)
*
* This file is part of Akantu
*
* 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 "py_aka_array.hh"
/* -------------------------------------------------------------------------- */
#include <contact_detector.hh>
#include <contact_element.hh>
#include <contact_mechanics_model.hh>
#include <geometry_utils.hh>
#include <mesh_events.hh>
#include <parsable.hh>
#include <surface_selector.hh>
/* -------------------------------------------------------------------------- */
#include <algorithm>
/* -------------------------------------------------------------------------- */
#include <pybind11/pybind11.h>
#include <pybind11/stl.h>
/* -------------------------------------------------------------------------- */
namespace py = pybind11;
/* -------------------------------------------------------------------------- */
namespace akantu {
/* -------------------------------------------------------------------------- */
#define def_function_nocopy(func_name) \
def( \
#func_name, \
[](ContactMechanicsModel & self) -> decltype(auto) { \
return self.func_name(); \
}, \
py::return_value_policy::reference)
#define def_function(func_name) \
def(#func_name, [](ContactMechanicsModel & self) -> decltype(auto) { \
return self.func_name(); \
})
namespace {
class ContactElementsView {
public:
ContactElementsView(const Array<ContactElement> & contact_elements)
: contact_elements(contact_elements) {}
auto begin() const { return contact_elements.begin(); }
auto end() const { return contact_elements.end(); }
auto size() const { return contact_elements.size(); }
auto operator[](size_t i) const { return contact_elements(i); }
auto contains(const ContactElement & contact_element) const {
return std::find(contact_elements.begin(), contact_elements.end(),
contact_element) != contact_elements.end();
}
private:
const Array<ContactElement> & contact_elements;
};
} // namespace
/* -------------------------------------------------------------------------- */
void register_contact_mechanics_model(py::module & mod) {
py::class_<ContactDetector>(mod, "ContactDetector",
py::multiple_inheritance())
.def(py::init<Mesh &, const ID &>(), py::arg("mesh"),
py::arg("id") = "contact_detector")
.def(py::init<Mesh &, Array<Real>, const ID &>(), py::arg("mesh"),
py::arg("positions"), py::arg("id") = "contact_detector")
.def("setSurfaceSelector", &ContactDetector::setSurfaceSelector);
py::class_<SurfaceSelector, std::shared_ptr<SurfaceSelector>>(
mod, "SurfaceSelector", py::multiple_inheritance())
.def(py::init<Mesh &>(), py::arg("mesh"));
py::class_<PhysicalSurfaceSelector, SurfaceSelector,
std::shared_ptr<PhysicalSurfaceSelector>>(
mod, "PhysicalSurfaceSelector")
.def(py::init<Mesh &>(), py::arg("mesh"));
py::class_<CohesiveSurfaceSelector, SurfaceSelector,
std::shared_ptr<CohesiveSurfaceSelector>>(
mod, "CohesiveSurfaceSelector")
.def(py::init<Mesh &>(), py::arg("mesh"));
py::class_<AllSurfaceSelector, SurfaceSelector,
std::shared_ptr<AllSurfaceSelector>>(mod, "AllSurfaceSelector")
.def(py::init<Mesh &>(), py::arg("mesh"));
py::class_<ContactMechanicsModelOptions>(mod, "ContactMechanicsModelOptions")
.def(py::init<AnalysisMethod>(),
py::arg("analysis_method") = _explicit_contact);
/* ------------------------------------------------------------------------ */
py::class_<ContactElementsView>(mod, "ContactElementsView")
.def("__iter__",
[](const ContactElementsView & self) {
return py::make_iterator(self.begin(), self.end());
})
.def("__size__",
[](const ContactElementsView & self) { return self.size(); })
.def(
"__contains__",
[](const ContactElementsView & self, const ContactElement & element) {
return self.contains(element);
})
.def("__getitem__",
[](const ContactElementsView & self, size_t i) { return self[i]; });
/* ------------------------------------------------------------------------ */
py::class_<ContactMechanicsModel, Model>(mod, "ContactMechanicsModel",
py::multiple_inheritance())
.def(py::init<Mesh &, UInt, const ID &, std::shared_ptr<DOFManager>,
const ModelType>(),
py::arg("mesh"), py::arg("spatial_dimension") = _all_dimensions,
py::arg("id") = "contact_mechanics_model",
py::arg("dof_manager") = nullptr,
py::arg("model_type") = ModelType::_contact_mechanics_model)
.def(
"initFull",
[](ContactMechanicsModel & self,
const ContactMechanicsModelOptions & options) {
self.initFull(options);
},
py::arg("options") = ContactMechanicsModelOptions())
.def(
"initFull",
[](ContactMechanicsModel & self,
const AnalysisMethod & analysis_method) {
self.initFull(_analysis_method = analysis_method);
},
py::arg("_analysis_method"))
.def_function(search)
.def_function(assembleStiffnessMatrix)
.def_function(assembleInternalForces)
.def_function_nocopy(getExternalForce)
.def_function_nocopy(getNormalForce)
.def_function_nocopy(getTangentialForce)
.def_function_nocopy(getInternalForce)
.def_function_nocopy(getGaps)
.def_function_nocopy(getNormals)
.def_function_nocopy(getNodalArea)
.def("getContactDetector", &ContactMechanicsModel::getContactDetector,
py::return_value_policy::reference)
.def("getContactElements", [](ContactMechanicsModel & self) {
return ContactElementsView(self.getContactElements());
});
py::class_<ContactElement>(mod, "ContactElement")
.def(py::init<>())
.def_readwrite("master", &ContactElement::master)
.def_readwrite("slave", &ContactElement::slave)
.def("__repr__", [](ContactElement & self) {
return "{master: " + std::to_string(self.master) +
", slave: " + std::to_string(self.slave) + "}";
});
py::class_<GeometryUtils>(mod, "GeometryUtils")
.def_static(
"normal",
[](const Mesh & mesh, const Array<Real> & positions,
const Element & element, bool outward) {
auto && coords =
mesh.extractNodalValuesFromElement(positions, element);
return GeometryUtils::normal(mesh, coords, element, outward);
},
py::arg("mesh"), py::arg("positions"), py::arg("element"),
py::arg("outward") = true)
.def_static(
"covariantBasis",
[](const Mesh & mesh, const Array<Real> & positions,
const Element & element, const Vector<Real> & normal,
Vector<Real> & natural_coord) {
auto && coords =
mesh.extractNodalValuesFromElement(positions, element);
return GeometryUtils::covariantBasis(coords, element, normal,
natural_coord);
},
py::arg("mesh"), py::arg("positions"), py::arg("element"),
py::arg("normal"), py::arg("natural_projection"))
.def_static(
"curvature",
[](const Mesh & mesh, const Array<Real> & positions,
const Element & element, const Vector<Real> & natural_coord) {
auto && coords =
mesh.extractNodalValuesFromElement(positions, element);
return GeometryUtils::curvature(coords, element, natural_coord);
})
.def_static(
"contravariantBasis",
[](const Vector<Real> & covariant) {
return GeometryUtils::contravariantBasis(covariant);
},
py::arg("covariant_basis"))
.def_static(
"realProjection",
[](const Mesh & mesh, const Array<Real> & positions,
const Vector<Real> & slave, const Element & element,
const Vector<Real> & normal) {
auto && coords =
mesh.extractNodalValuesFromElement(positions, element);
return GeometryUtils::realProjection(coords, slave, normal);
},
py::arg("mesh"), py::arg("positions"), py::arg("slave"),
py::arg("element"), py::arg("normal"))
.def_static("isBoundaryElement", &GeometryUtils::isBoundaryElement);
}
} // namespace akantu

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