Presentations

Extension of Pseudo-Elastic Cavitation Model for Cyclic Loading for TSSA

This study proposes an extension of the pseudo-elastic cavitation model in order to describe the structural behaviour of silicone adhesives under cyclic loading. Based on cyclic uniaxial tensile tests as well as cyclic heavily constrained tensile tests, that is the pancake test, the material softening due to cyclic loading is described by the approach of pseudo-elasticity. The basic idea is to transfer the classical description of pseudo-elasticity for stress softening under cyclic loading according to Ogden & Roxburgh 1999 to the pseudo-elastic cavitation model. The advantages of the approach of pseudo-elasticity lie in the simple formulation, where the functional can be completely described on the macro-scale, the application of the volumetric-isochoric split, which brings advantages regarding the material parameter identification and the avoidance of computationally intensive and complex multi-scale modelling methods. In order to show that the approach presented functions, both cyclic experiments are numerically calculated.