1) Exponential discretization of plastic kinematic equation
2) OW backstress model implemented for kinematic hardening
3) Modified tangent modulus computation includes contributions from kinematic and isotropic hardening
4) Newton-Raphson method augmented with line search to solve the nonlinear system of equations in the constitutive model
4) Different initial guess for the stress at the start of the line search to reduce number of nonlinear constitutive model iterations.
Modifications include the following :
1) Exponential discretization of plastic kinematic equation 2) OW backstress model implemented for kinematic hardening 3) Modified tangent modulus computation includes contributions from kinematic and isotropic hardening 4) Newton-Raphson method augmented with line search to solve the nonlinear system of equations in the constitutive model 4) Different initial guess for the stress at the start of the line search to reduce number of nonlinear constitutive model iterations.