Estimation of Conbined Hardening Model Parameter Values for Korean Steel Grades

Abstract

To evaluate the structure accurately by using finite element analysis (FEA), a proper material model should be used. For structural members sustaining cyclic loads induced from wind and earthquake loads, a material model that account for should accurately represent the cyclic inelastic behavior of materials. For steel materials, combined hardening models have been commonly used to simulate their inelastic cyclic behavior. The aim of this study is to estimate the combined hardening model parameters for SS275 and SM355 steel, which are commonly used in Korea. Monotonic and cyclic material tests were conducted to obtain low cycle fatigue data. The parameters are determined using the particle swarm optimization (PSO) with test data.