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. 2023 Feb 6;16(4):1367. doi: 10.3390/ma16041367
Variable Description
σ, σij Cauchy stress
S Second Piola Kirchhoff stress
E, Eij Green-Lagrange strain
ϵpl,ϵeq Plastic strain tensor, equivalent plastic strain
ϵeng Engineering strain
γ˙α Shear rate of dislocation on slip system α
γ˙0 Initial shear rate
τα Resolved shear stress for slip system α
τ0 Initial guess for the slip resistance
{σm,Q,b} Isotropic hardening material parameter for J2 plasticity model
{Ci,gi} Chaboche kinematic hardening material parameter for J2 plasticity model
{τcf,h0,p2} Isotropic hardening parameters for CP model
{η,μ,m} Onho-Wang Kinematic hardening parameters for CP model
Y,G Young’s modulus and shear modulus
ϵeq Equivalent strain
C Stiffness tensor
F Deformation gradient
Fe Elastic deformation gradient
Fp Plastic deformation gradient
I Unit tensor
q Crystallographic orientation
wi Weight of ith crystallographic orientation
f Orientation distribution function from experimental data
f^ Orientation distribution function from reduced discrete orientations
ψΩ Kernel density function with half-width Ω
R Ratio of maximum and minimum strains in cyclic hysteresis loop
θ Amplitude of torsional cyclic deformation