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defgradTolerance 1.0e-7 # deviation of deformation gradient that is still allowed (used by CPFEM to determine outdated ffn1)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