INELASTIC CONSTITUTIVE PARAMETER-IDENTIFICATION USING AN EVOLUTIONARYALGORITHM WITH CONTINUOUS INDIVIDUALS

This paper presents a method for identifying the parameter set of inel astic constitutive equations, which is based on an evolutionary algori thm proposed by the authors. The advantage of the method is that appro priate parameters can be identified even when the measured data are su bject to considerable errors and the model equations are inaccurate. T he design of experiments suited for the parameter identification of a material model by Chaboche under the uniaxial loading and stationary t emperature conditions was first considered. Then the parameter set of the model was identified by the proposed method from a set of experime ntal data. In comparison to those by other methods, the resultant stre ss-strain curves by the proposed method correlated well and reliably t o the actual material behaviors.