剛球押込み試験とベイズ推定を用いた弾粘塑性体の材料パラメータ同定法

抄録

An estimation method for unknown constitutive parameters of elasto-viscoplasticity material models by constructing a database that consists of results of finite element analysis is developed. Recently, a Bayesian approach to estimate accurately material properties from data of a single spherical indentation test has been proposed. In this study, we aim to improve generality of the identification method by increasing the number of parameters to be estimated and verify the validity of the material parameter values estimated using spherical indentation test data. Identification of four material properties was attempted, but the data did not differ in the range of small values for the strain sensitivity index, and the identification could not be performed with sufficiently high accuracy. In selecting the parameters to be estimated, it is necessary to fully verify the sensitivity of the parameters to the data used for Bayesian estimation.