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body_boundary_conditions.py
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Wed, Dec 25, 21:08

body_boundary_conditions.py
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#!/usr/bin/env python3
""" plate.py: Plate with hole linear elastic example"""
__author__ = "Guillaume Anciaux"
__credits__ = [
"Guillaume Anciaux <guillaume.anciaux@epfl.ch>",
]
__copyright__ = "Copyright (©) 2016-2021 EPFL (Ecole Polytechnique Fédérale" \
" de Lausanne) Laboratory (LSMS - Laboratoire de Simulation" \
" en Mécanique des Solides)"
__license__ = "LGPLv3"
try:
from mpi4py import MPI
comm = MPI.COMM_WORLD
prank = comm.Get_rank()
except ImportError:
prank = 0
import akantu as aka
import numpy as np
# -----------------------------------------------------------------------------
def solve(material_file, mesh_file, body_stress):
aka.parseInput(material_file)
spatial_dimension = 2
# -------------------------------------------------------------------------
# Initialization
# -------------------------------------------------------------------------
mesh = aka.Mesh(spatial_dimension)
if prank == 0:
mesh.read(mesh_file)
mesh.distribute()
model = aka.SolidMechanicsModel(mesh)
model.initFull(_analysis_method=aka._static)
model.setBaseName("square")
model.addDumpFieldVector("displacement")
model.addDumpFieldVector("external_force")
model.addDumpField("strain")
model.addDumpField("stress")
model.addDumpField("blocked_dofs")
# -------------------------------------------------------------------------
# Boundary conditions
# -------------------------------------------------------------------------
model.applyBC(aka.FixedValue(0.0, aka._x), "Fixed_y")
model.applyBC(aka.FixedValue(0.0, aka._y), "Fixed_y")
gravity = np.eye(2)*body_stress
model.applyBC(aka.BodyStressFunctor(gravity), "steel")
solver = model.getNonLinearSolver()
solver.set("max_iterations", 2)
solver.set("threshold", 1e-10)
solver.set("convergence_type", aka.SolveConvergenceCriteria.solution)
model.solveStep()
model.dump()
# -----------------------------------------------------------------------------
# main
# -----------------------------------------------------------------------------
def main():
mesh_file = 'square.msh'
material_file = 'material.dat'
body_stress = 1.
solve(material_file, mesh_file, body_stress)
# -----------------------------------------------------------------------------
if __name__ == "__main__":
main()

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