Isotropic-Kinematic Hardening Model for Elastic-Plastic Cyclic Structural Analysis.

摘要

This report outlines the use of a combined isotropic-kinematic hardening theory to analyze structures undergoing large reversals of plastic strain. The numerical work is based on the finite element method, and a suitable incremental stress-strain relation of combined hardening theory of plasticity is implemented; the theory requires only minor additions to the more common kinematic or isotropic hardening rules. The report shows the required parameters describing the kinematic and isotropic portions of the combined hardening theory can be extracted from cyclic mechanical tests. The theory is used to determine the cyclic response of a mild steel beam. the uniaxial arbitrary cyclic behavior of mild steel is very accurately modeled by a series of spring-slider elements. (Author)