抄録
Polymeric material is useful in daily life. Especially, Polypropylene has superior character in many fields. In this study, inelastic deformation properties of Polypropylene are obtained by using the inverse analysis on load-depth curve measured by micro-indentation tests. The new expression of polypropylene's rate dependent constitutive equation is presented and the Kalman's filter is used in the inverse analysis. It is found that the analytical determined inelastic constitutive equations are almost same as the actual stress-strain relations of Polypropylene which are obtained by compression tests at various strain rate.
