COMPUTER-AIDED NUMERICAL PROCEDURE TO DETERMINE MATERIAL CONSTANTS OF CONSTITUTIVE MODELS FOR SINGLE CRYSTAL ALLOYS

摘要

This paper presents a computer-aided numerical procedure to determine the material constants of two different types of constitutive models, phenomenological and crystallographic, developed for single crystal materials. The procedure is based on identifying a group of generic equations for the two models applied to simple uniaxial loading conditions. The generic equations allow material constants for the two models to be determined using the same experimental results. The material constants are then used in numerical simulations of the models. Simulations are also undertaken to investigate the intrinsic characteristics of the two models.