Identification of elasto-plastic mechanical properties for bimetallic sheets by hybrid-inverse approach

摘要

Analysis, evaluation and interpretation of measured signals become important components in engineering research and practice, especially for those material characteristic parameters which can not be obtained directly by experimental measurements. The present paper proposes a hybrid-inverse analysis method to the identification of the nonlinear material parameters of any individual component from the mechanical responses of a global composite. The method couples experimental approach, numerical simulation with inverse search method. The experimental approach is used to provide basic data which parameter identification and numerical simulation is utilized to identify elasto-plastic material properties by means of experimental data obtained and inverse searching algorithm. A numerical example of a stainless steel clad copper sheet is considered to verify and show the applicability of the proposed hybrid-inverse method. In this example, a set of material parameters in an elasto-plastic constitutive model have been identified by using the obtained experimental data.