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rAKA/examples/python/contact_mechanics_model/friction/bloc_friction.py
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bloc_friction.py
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#!/usr/bin/env python3
__copyright__ = (
"Copyright (©) 2021-2024 EPFL (Ecole Polytechnique Fédérale de Lausanne)"
"Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)"
)
__license__ = "LGPLv3"
import akantu as aka
aka.parseInput('material.dat')
mesh = aka.Mesh(2)
mesh.read('bloc.msh')
coupler = aka.CouplerSolidContact(mesh)
solid = coupler.getSolidMechanicsModel()
contact = coupler.getContactMechanicsModel()
material_selector = aka.MeshDataMaterialSelectorString("physical_names", solid)
solid.setMaterialSelector(material_selector)
coupler.initFull(_analysis_method=aka._explicit_lumped_mass)
surface_selector = aka.PhysicalSurfaceSelector(mesh)
detector = contact.getContactDetector()
detector.setSurfaceSelector(surface_selector)
time_step = solid.getStableTimeStep()
time_step *= 0.1
coupler.setTimeStep(time_step)
print(f"Time step: {time_step}")
coupler.setBaseName("bloc_dumped")
coupler.addDumpFieldVector("displacement")
coupler.addDumpFieldVector("velocity")
coupler.addDumpFieldVector("normals")
coupler.addDumpFieldVector("tangents")
coupler.addDumpFieldVector("contact_force")
coupler.addDumpFieldVector("external_force")
coupler.addDumpFieldVector("internal_force")
coupler.addDumpField("areas")
coupler.addDumpField("stress")
coupler.addDumpField("blocked_dofs")
solid.applyBC(aka.FixedValue(0.0, aka._x), "XFixed")
solid.applyBC(aka.FixedValue(0.0, aka._y), "YFixed")
solid.applyBC(aka.FixedValue(0.0, aka._x), "loading")
solid.applyBC(aka.FixedValue(0.0, aka._y), "loading")
velocity = solid.getVelocity()
gaps = contact.getGaps()
coupler.dump()
for s in range(0, 10000):
solid.applyBC(aka.IncrementValue(-1.0 / 10000, aka._y), "loading")
coupler.solveStep()
for i, (gap, vel) in enumerate(zip(gaps, velocity)):
if gap > 0:
velocity[i] *= 0.99
if s % 100 == 0:
coupler.dump()
print(f"Step {s}\t", end="\r", flush=True)
print("Compression done !")
for s in range(0, 10000):
solid.applyBC(aka.IncrementValue(2.0 / 10000, aka._x), "loading")
coupler.solveStep()
for i, (gap, vel) in enumerate(zip(gaps, velocity)):
if gap > 0:
velocity[i] *= 0.99
if s % 100 == 0:
coupler.dump()
print(f"Step {s}\t", end="\r", flush=True)
print("Sliding done !")
for s in range(0, 10000):
coupler.solveStep()
for i, (gap, vel) in enumerate(zip(gaps, velocity)):
if gap > 0:
velocity[i] *= 0.99
if s % 100 == 0:
coupler.dump()
print(f"Step {s}\t", end="\r", flush=True)
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