if MM < 1e-4:
MM = 0.
pseudodynamic = False
elif nit <= 6:
MM /= 2.
else:
TMP = md.interpolation("max(psi0_max,psi0)", mimd1, -1)
md.set_variable("psi0_max", TMP)
break
out = (mfu, md.variable("u"), "Displacements", mfphi,
md.variable("phi"), "phi")
for i, j in [[1, 1], [2, 2], [1, 2]]:
sigma = gf.asm_generic(mim, 1, "{sigma}({i},{j})*Test_t".format(sigma=_sigma_, i=i, j=j),
-1, md, "t", True, mfout, np.zeros(mfout.nbdof()))\
[md.nbdof():]
sigma = np.transpose(gf.linsolve_mumps(mass_mat, sigma))
out += (mfout, sigma, "Cauchy Stress {i}{j}".format(i=i, j=j))
mfout.export_to_vtk("%s/demo_phase_field_%i.vtk" % (resultspath, step),
*out)
DIRMULT = -md.variable(dirmultname)
DIRMULT = np.reshape(DIRMULT, [1, DIRMULT.size])
dfT = gf.asm_boundary_source(T_BOUNDARY, mim, mfu,
md.mesh_fem_of_variable(dirmultname),
DIRMULT)
f.write(("step=%i eps=%e fR=(%e,%e)\n") %
(step, eps, dfT[0::N].sum(), dfT[1::N].sum()))
f.flush()
output = (mfu, md.variable('u'),
'Displacements', mfp, md.variable('p'), 'Pressure', mfksi,
md.variable('ksi'), 'dksi', mf_dirichlet_mult,
-md.variable(dirichlet_multname), "Reaction stresses", mfout,
VM, 'Von Mises Stress', mfu, RHS[IU[0]:IU[0] + IU[1]],
'residual u', mfp, RHS[IP[0]:IP[0] + IP[1]], 'residual p',
mfksi, RHS[IKSI[0]:IKSI[0] + IKSI[1]], 'residual ksi')
md.finite_strain_elastoplasticity_next_iter\
(mim, "Simo_Miehe", "displacement_and_plastic_multiplier_and_pressure",
"u", "ksi", "p", "gamma0", "invCp0", _K_, _mu_, "hardening_law")
GAMMA = gf.asm_generic(mim, 1, "gamma*Test_t", -1, "gamma", False,
mimd1, md.variable("gamma0"), "t", True, mfout,
np.zeros(mfout.nbdof()))
GAMMA = np.transpose(gf.linsolve_mumps(mass_mat, GAMMA))
output += (mfout, GAMMA, "plastic strain")
mf1.export_to_vtk(
'%s/finite_strain_plasticity_%i.vtk' % (resultspath, step),
'ascii', *output)
DIRMULT = -md.variable(dirichlet_multname)
DIRMULT = np.reshape(DIRMULT, [1, DIRMULT.size])
if symmetric and not rigid_grip:
dfR = gf.asm_boundary_source(R_BOUNDARY, mim, mf1,
mf_dirichlet_mult, DIRMULT)
f.write(('step=%i fR=(%f,0) sR=(%f,0)\n') %
(step, dfR.sum(), dfR.sum() / H))
else:
dfR = gf.asm_boundary_source(R_BOUNDARY, mim, mfN,
md.add_initialized_data("f", [0,0])
md.add_initialized_data("dt", [dt])
md.add_initialized_data("nu", [nu])
md.add_Dirichlet_condition_with_multipliers(mim, "p", mfp, IN_RG, "p_in")
md.add_nonlinear_term\
(mim, "1/dt*(v-v0).Test_v + (Grad_v0*v0).Test_v + nu*Grad_v:Grad_Test_v - f.Test_v")
md.add_nonlinear_term\
(mim, "Grad_p.Grad_Test_p + 1/dt*Trace(Grad_v)*Test_p")
mmat_v = gf.asm_mass_matrix(mim, mfv)
#mmat_v = gf.asm_generic(mim, 2, "Test2_v.Test_v", -1, "v", 1, mfv, np.zeros(mfv.nbdof()))
IV = md.interval_of_variable("v")
t = 0
step = 0
while t < T+1e-8:
print("Solving step at t=%f" % t)
md.set_variable\
("p_in", mfp_.eval(p_in_str.format(t), globals(), locals()).flatten("F"))
md.set_variable("v0", md.variable("v"))
md.solve("noisy", "lsolver", "mumps", "max_res", 1e-8)
vv = (gf.asm_generic(mim, 1, "(v-dt*Grad_p).Test_v", -1, md))[IV[0]:IV[0]+IV[1]]
md.set_variable("v", gf.linsolve_mumps(mmat_v, vv))
mfv.export_to_vtk("results_%i.vtk" % step,
mfv, md.variable("v"), "Velocity",
mfp, md.variable("p"), "Pressure")
t += dt
step += 1