/// PhD defense Michi Drass: “Constitutive modeling and failure prediction of silicon adhesives and facade design”
The objective of the dissertation by Dr. Michael Drass aims to improve the understanding of the elementary material behavior of flat-bonded structural silicone adhesives in modern façades. Therefore, experimental investigations were carried out on a transparent structural silicone adhesive (TSSA). Based on the experimental data, novel hyperelastic material models were developed to account for the strong non-linear material behavior under isochoric as well as volumetric deformations. The quality of the material models was verified by three-dimensional numerical simulations of validation experiments, which showed excellent results. Additionally, a novel stretch-based failure criterion was developed and applied to predict the failure of the material in Finite Element calculations. Finally, the novel stretch-based failure criterion was combined with a global safety concept to ensure and calculate the structural integrity of bonded components in the façade application.