Identification of Anisotropic Elastic Parameter with the Aid of Extended Kalman Filter.

Abstract

The paper deals with the inverse problem of identifying the elastic constants of anisotropic elastic materials. To solve the problem, the extended Kalman filter algorithm is combined with the finite element method. The effectiveness of the method is demonstrated by two simulations, I and II. The isotropic elastic constants are identified in simulation I. The orthotropic elastic constants are identified in simulation II. At the beginning of the identification processes, the materials are assumed to be orthotropic in simulation I and isotropic in simulation II. It was confirmed through the two simulations that the material constants were identified correctly.