Development of Failure Criteria for Poro-Hyperelastic Materials

Abstract

This chapter deals with the description of failure of rubber-like materials under consideration of the porosity of the material, as this is decisive for the failure under triaxial loading conditions (Gent and Lindley, 1959; Hamdi et al., 2014; Drass et al., 2018c). Since failure of rubber-like materials depends strongly on the loading condition (isochoric or volumetric loading), failure criteria for the description of isochoric failure are first introduced and tested for their applicability to approximate the experimentally determined failure stretches of TSSA (see Section 4). Additionally, rubber-like materials exhibit cavitation failure under triaxial loading, which means that there is an effective stress softening of the hydrostatic pressure p with increasing volume.