A Novel Approach for Determination of Hardening Parameters of an Aluminum Alloy under Cyclic Loading with High Amplitudes

Abstract

Abstract An optimization procedure for the determination of combined nonlinear isotropic/kinematic hardening parameters for strain rate-independent cyclic plasticity has been investigated. With this procedure, it is offered that only nine material parameters, including Young’s modulus, yield stress, Poisson’s ratio, two isotropic hardening parameters, and four kinematic hardening parameters, will be sufficient to perform cyclic plasticity analysis with high accuracy in well-known FE programs (e.g. ABAQUS) even for separate strain range amplitudes. The procedure has been performed to calculate such parameters for aluminum alloy EN AW-6082, which is frequently used in vehicle bodies and simulation results are compared with experiment results. The determined parameters lead highly accurate simulation results in FE routines.