59 lines
4.6 KiB
Plaintext
59 lines
4.6 KiB
Plaintext
### $Id$ ###
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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defgradTolerance 1.0e-7 # deviation of deformation gradient that is still allowed (used by CPFEM to determine outdated ffn1)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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## 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_tol 1.0e-2 # 1.0e-4 proposed by Suquet, less strict criteria are usefull
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err_defgrad_tol 1.0e-3 # relative tolerance for fullfillment of average deformation gradient (is usually passively fullfilled)
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err_stress_tolrel 0.01 # relative tolerance for fullfillment of stress BC
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itmax 40 # Maximum iteration number
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memory_efficient 1 # Precalculate Gamma-operator (81 double per point)
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