# Default values of all available numerical parameters # Please note that keys are case sensitive solver: grid: N_staggered_iter_max: 10 # max number of field-level staggered iterations N_cutback_max: 3 # maximum cutback level (0: 1, 1: 0.5, 2: 0.25, etc) damage: N_iter_max: 100 # maximum iteration number eps_abs_phi: 1.0e-2 # absolute tolerance for damage evolution eps_rel_phi: 1.0e-6 # relative tolerance for damage evolution phi_min: 1.0e-6 # residual integrity thermal: N_iter_max: 100 # maximum iteration number eps_abs_T: 1.0e-2 # absolute tolerance for thermal equilibrium eps_rel_T: 1.0e-6 # relative tolerance for thermal equilibrium mechanical: N_iter_min: 1 # minimum iteration number N_iter_max: 100 # maximum iteration number eps_abs_div(P): 1.0e-4 # absolute tolerance for fulfillment of stress equilibrium eps_rel_div(P): 5.0e-4 # relative tolerance for fulfillment of stress equilibrium eps_abs_P: 1.0e3 # absolute tolerance for fulfillment of stress BC eps_rel_P: 1.0e-3 # relative tolerance for fulfillment of stress BC update_gamma: false # update Gamma-operator with current dPdF (not possible if FFT: memory_efficient == true) PETSc_options: -snes_type ngmres -snes_ngmres_anderson # PETSc solver options FFT: memory_efficient: true # precalculate Gamma-operator (81 doubles per point) divergence_correction: size+grid # use size-independent divergence criterion {none, size, size+grid} derivative: continuous # approximation used for derivatives in Fourier space {continuous, central_difference, FWBW_difference} FFTW_plan_mode: FFTW_MEASURE # planning-rigor flags, see manual at https://www.fftw.org/fftw3_doc/Planner-Flags.html FFTW_timelimit: -1.0 # time limit of plan creation for FFTW, see manual on www.fftw.org. (-1.0: disable time limit) alpha: 1.0 # polarization scheme parameter 0.0 < alpha < 2.0 (1.0: AL scheme, 2.0: accelerated scheme) beta: 1.0 # polarization scheme parameter 0.0 < beta < 2.0 (1.0: AL scheme, 2.0: accelerated scheme) eps_abs_curl(F): 1.0e-10 # absolute tolerance for fulfillment of strain compatibility eps_rel_curl(F): 5.0e-4 # relative tolerance for fulfillment of strain compatibility mesh: N_cutback_max: 3 # maximum cut back level (0: 1, 1: 0.5, 2: 0.25, etc) N_staggered_iter_max: 10 # max number of field level staggered iterations p_s: 2 # order of displacement shape functions p_i: 2 # order of quadrature rule required bbarstabilization: false mechanical: N_iter_max: 250 # Maximum iteration number eps_abs_div(P): 1.0e-10 # absolute tolerance for mechanical equilibrium eps_rel_div(P): 1.0e-4 # relative tolerance for mechanical equilibrium Marc: unit_length: 1.0 # physical length of one computational length unit homogenization: mechanical: RGC: eps_abs_P: 1.0e+4 # absolute tolerance of RGC residuum (in Pa) eps_rel_P: 1.0e-3 # relative ... eps_abs_max: 1.0e+10 # absolute upper-limit of RGC residuum (in Pa) eps_rel_max: 1.0e+2 # relative ... Delta_a: 1.0e-7 # perturbation for computing penalty tangent relevant_mismatch: 1.0e-5 # minimum threshold of mismatch viscosity_exponent: 1.0e+0 # power (sensitivity rate) of numerical viscosity in RGC scheme viscosity_modulus: 0.0e+0 # stress modulus of RGC numerical viscosity (0: without numerical viscosity) # suggestion: larger than the aTol_RGC but still far below the expected flow stress of material dot_a_ref: 1.0e-3 # reference rate of relaxation (about the same magnitude as straining rate, possibly a bit higher) dot_a_max: 1.0e+0 # threshold of maximum relaxation vector increment (if exceed this then cutback) Delta_V_max: 1.0e-5 # maximum allowable relative volume discrepancy Delta_V_modulus: 1.0e+12 Delta_V_exponent: 5.0 phase: mechanical: r_cutback_min: 1.0e-3 # minimum (relative) size of step allowed during cutback in phase state calculation r_cutback: 0.25 # factor to decrease size of step when cutback introduced in phase state calculation (value between 0 and 1) r_increase: 1.5 # factor to increase size of next step when previous step converged in phase state calculation eps_rel_state: 1.0e-6 # relative tolerance in phase state loop (abs tol provided by constitutive law) N_iter_state_max: 10 # state loop limit plastic: r_linesearch_Lp: 0.5 # factor to decrease the step if Lp calculation fails to converge eps_rel_Lp: 1.0e-6 # relative tolerance in Lp residuum eps_abs_Lp: 1.0e-8 # absolute tolerance in Lp residuum N_iter_Lp_max: 40 # stress loop limit for Lp f_update_jacobi_Lp: 1 # frequency of Jacobian update of residuum in Lp integrator_state: FPI # integration method (FPI = Fixed Point Iteration, Euler = Euler, AdaptiveEuler = Adaptive Euler, RK4 = classical 4th order Runge-Kutta, RKCK45 = 5th order Runge-Kutta Cash-Karp) eigen: r_linesearch_Li: 0.5 # factor to decrease the step if Li calculation fails to converge eps_rel_Li: 1.0e-6 # relative tolerance in Li residuum eps_abs_Li: 1.0e-8 # absolute tolerance in Li residuum N_iter_Li_max: 40 # stress loop limit for Li f_update_jacobi_Li: 1 # frequency of updating the Jacobian of residuum in Li generic: random_seed: 0 # fixed seeding for pseudo-random number generator (0: use random seed)