Identification of mechanical properties of component layers in a bimetallic sheet by mixed experimental-numerical approach

The present paper proposes a novel approach for the identification of the mechanical properties of individual component layers of a bimetallic sheet. This method has an advantage of using the experimental data (tensile load vs strain curve in the uniaxial tension test and the bending moment vs curvature diagram in the cyclic bending test) for a whole bimetallic sheet but not for individual component layers. A set of material parameters in each of two types constitutive model of cyclic plasticity for individual component layer was identified by minimizing the difference between the experimental results and the corresponding results of numerical simulation. An optimization technique based on the iterative multipoint approximation concept was used for the identification of the material parameters.