Inverse method for characterizing the mechanical frequency dependence of isotropic materials

We present an approach for characterizing the mechanical frequency dependence of solid materials (i.e., viscoelasticity). Especially plastics commonly show a viscoelastic behavior. The frequency-dependent mechanical material parameters are identified through the inverse method, which is based on the minimization of deviations between measurements and simulation results via an iterative adjustment of the parameters. In this contribution, an adapted inverse method and the principle of the material characterization are illustrated. In addition, we compare selected viscoelastic material models and discuss the applicability of these models by means of an exemplary solid material.