Estimation Method of Material Properties of Hyperelastic Structures

Abstract

In this paper, we study the inverse estimation method of the material properties of hyperelastic material with arbitrary shape through the deformation behavior. A typical hyperelastic material, silicon, was fabricated in a hemispherical shape, and the indenter was pressed at 1 mm intervals from 1 mm to 7 mm. During this process, displacement information of the silicon surface was obtained using a 3-D scanner. In addition, the applied load was measured by using a load cell attached to the indenter. An approximate modeling technique was applied to match the load - displacement relationship obtained from the simulation with the simulation results using the finite element analysis. The material model used in the simulation is a Mooney-Rivlin model.