Elasticviscoplastic implicit integration algorithm applicable to both plane stress and three-dimensional stress states
An implicit algorithm applicable to both plane stress and three-dimensional stress integrations is developed. The algorithm is effective for a general class of nonlinear kinematicisotropic hardening models. A mode patch that makes the algorithm applicable to both plane stress and three-dimensional stress states. Two trial stresses are examined to be initial values for the Newton-Raphson iteration in the algorithm. Elasticviscoplastic trial stress enables quadratic convergence to occur much earlier than elastic one.
implicit integration plane stress three-dimensional stress viscoplasticity constitutive models