### numerical parameters ### relevantStrain 1.0e-7 # strain increment considered significant (used by crystallite to determine whether strain inc is considered significant) defgradTolerance 1.0e-7 # deviation of deformation gradient that is still allowed (used by CPFEM to determine outdated ffn1) iJacoStiffness 1 # frequency of stiffness update iJacoLpresiduum 1 # frequency of Jacobian update of residuum in Lp pert_Fg 1.0e-7 # deformation gradient perturbation for grain tangent pert_method 1 # perturbation method (1 = forward, 2 = backward or 3 = central) integrator 1 # integration method (1 = Fixed Point Iteration, 2 = Euler, 3 = Adaptive Euler, 4 = classical 4th order Runge-Kutta, 5 = 5th order Runge-Kutta Cash-Karp) integratorStiffness 1 # integration method used for stiffness (1 = Fixed Point Iteration, 2 = Euler, 3 = Adaptive Euler, 4 = classical 4th order Runge-Kutta, 5 = 5th order Runge-Kutta Cash-Karp) unitlength 1 # physical length of one computational length unit usepingpong 1 # use the ping pong (collect <-> calc) scheme (always off for Abaqus exp, must be on for Spectral Solver) ## crystallite numerical parameters ## nCryst 20 # crystallite loop limit (only for debugging info, loop limit is determined by "subStepMinCryst") subStepMinCryst 1.0e-3 # minimum (relative) size of sub-step allowed during cutback in crystallite subStepSizeCryst 0.25 # size of substep when cutback introduced in crystallite (value between 0 and 1) stepIncreaseCryst 1.5 # increase of next substep size when previous substep converged in crystallite (value higher than 1) nState 10 # state loop limit nStress 40 # stress loop limit rTol_crystalliteState 1.0e-6 # relative tolerance in crystallite state loop (abs tol provided by constitutive law) rTol_crystalliteStress 1.0e-6 # relative tolerance in crystallite stress loop (Lp residuum) aTol_crystalliteStress 1.0e-8 # absolute tolerance in crystallite stress loop (Lp residuum!) rTol_crystalliteTemperature 1.0e-6 # relative tolerance in crystallite state/temperature loop ## homogenization numerical parameters ## nHomog 20 # homogenization loop limit (only for debugging info, loop limit is determined by "subStepMinHomog") subStepMinHomog 1.0e-3 # minimum (relative) size of sub-step allowed during cutback in homogenization subStepSizeHomog 0.25 # size of substep when cutback introduced in homogenization (value between 0 and 1) stepIncreaseHomog 1.5 # increase of next substep size when previous substep converged in homogenization (value higher than 1) nMPstate 10 # materialpoint state loop limit ## RGC scheme numerical parameters ## aTol_RGC 1.0e+4 # absolute tolerance of RGC residuum (in Pa) rTol_RGC 1.0e-3 # relative ... aMax_RGC 1.0e+10 # absolute upper-limit of RGC residuum (in Pa) rMax_RGC 1.0e+2 # relative ... perturbPenalty_RGC 1.0e-7 # perturbation for computing penalty tangent maxRelaxation_RGC 1.0e+0 # threshold of maximum relaxation vector increment (if exceed this then cutback) relevantMismatch_RGC 1.0e-5 # minimum threshold of mismatch viscosityPower_RGC 1.0e+0 # power (sensitivity rate) of numerical viscosity in RGC scheme viscosityModulus_RGC 0.0e+0 # stress modulus of RGC numerical viscosity (zero = without numerical viscosity) # suggestion: larger than the aTol_RGC but still far below the expected flow stress of material refRelaxationRate_RGC 1.0e-3 # reference rate of relaxation (about the same magnitude as straining rate, possibly a bit higher) maxVolDiscrepancy_RGC 1.0e-5 # maximum allowable relative volume discrepancy volDiscrepancyMod_RGC 1.0e+12 discrepancyPower_RGC 5.0 random_seed 0 # any integer larger than zero seeds the random generator, otherwise random seeding ## spectral parameters ## err_div_tolAbs 1.0e-3 # absolute tolerance for fulfillment of stress equilibrium err_div_tolRel 5.0e-4 # relative tolerance for fulfillment of stress equilibrium err_curl_tolAbs 1.0e-12 # absolute tolerance for fulfillment of strain compatibility err_curl_tolRel 5.0e-4 # relative tolerance for fulfillment of strain compatibility err_stress_tolAbs 1.0e3 # absolute tolerance for fulfillment of stress BC err_stress_tolRel 0.01 # relative tolerance for fulfillment of stress BC fftw_timelimit -1.0 # timelimit of plan creation for FFTW, see manual on www.fftw.org, Default -1.0: disable timelimit rotation_tol 1.0e-12 # tolerance of rotation specified in loadcase, Default 1.0e-12: first guess fftw_plan_mode FFTW_PATIENT # reads the planing-rigor flag, see manual on www.fftw.org, Default FFTW_PATIENT: use patient planner flag itmax 250 # Maximum iteration number itmin 2 # Minimum iteration number maxCutBack 3 # maximum cut back level (0: 1, 1: 0.5, 2: 0.25, etc) memory_efficient 1 # Precalculate Gamma-operator (81 double per point) update_gamma 0 # Update Gamma-operator with current dPdF (not possible if memory_efficient=1) divergence_correction 2 # Use size-independent divergence criterion spectralsolver basicPETSc # Type of spectral solver (basicPETSc/polarisation) spectralfilter none # Type of filtering method to mitigate Gibb's phenomenon (none, cosine, ...) petsc_options -snes_type ngmres -snes_ngmres_anderson # PetSc solver options regridMode 0 # 0: no regrid; 1: regrid if DAMASK doesn't converge; 2: regrid if DAMASK or BVP Solver doesn't converge polarAlpha 1.0 # polarization scheme parameter 0.0 < alpha < 2.0. alpha = 1.0 ==> AL scheme, alpha = 2.0 ==> accelerated scheme polarBeta 1.0 # polarization scheme parameter 0.0 < beta < 2.0. beta = 1.0 ==> AL scheme, beta = 2.0 ==> accelerated scheme