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rAKA/examples/python/contact-mechanics/press_2d.py
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press_2d.py
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import py11_akantu as akantu
max_steps = 20000
imposing_steps = 10000
damping_interval = 10
max_displacement = 0.01
damping_ratio = 0.9
spatial_dimension = 2
akantu.parseInput('./material_press.dat')
mesh = akantu.Mesh(spatial_dimension)
mesh.read('./press_2d.msh')
coupler = akantu.CouplerSolidContact(mesh)
solid = coupler.getSolidMechanicsModel()
contact = coupler.getContactMechanicsModel()
selector = akantu.MeshDataMaterialSelectorString("physical_names", solid)
solid.initFull(akantu._explicit_lumped_mass)
contact.initFull(akantu._explicit_dynamic_contact)
solid.applyBC(akantu.FixedValue(0.0, akantu._x), "bottom")
solid.applyBC(akantu.FixedValue(0.0, akantu._y), "bottom")
coupler.initFull(akantu._explicit_dynamic_contact)
time_step = solid.getStableTimeStep()
time_step *= 0.1
coupler.setTimeStep(time_step)
coupler.setBaseName("python-press")
coupler.addDumpFieldVector("displacement")
coupler.addDumpFieldVector("normals")
coupler.addDumpFieldVector("tangents")
coupler.addDumpFieldVector("contact_force")
coupler.addDumpFieldVector("external_force")
coupler.addDumpFieldVector("internal_force")
coupler.addDumpField("gaps")
coupler.addDumpField("areas")
coupler.addDumpField("blocked_dofs")
coupler.addDumpField("grad_u")
coupler.addDumpField("stress")
coupler.dump()
velocity = solid.getVelocity()
for s in range(0, max_steps):
if s > 0 and s <= imposing_steps/2:
increment = max_displacement / (imposing_steps/2.0)
solid.applyBC(akantu.IncrementValue(-increment, akantu._y), "top")
if s >= imposing_steps/2 and s <= max_steps/2:
increment = max_displacement / (max_steps/2.0 - imposing_steps/2.0)
solid.applyBC(akantu.IncrementValue(-increment, akantu._x), "top")
coupler.solveStep()
if s % damping_interval == 0:
velocity *= damping_ratio
if s % 100 == 0:
coupler.dump()
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