ABSTRACT
Mars & Fatemi (2005) have introduced a multiaxial fatigue criterion, the Cracking Energy Density (CED), which represents the Strain Energy Density available on the cracking plane. This criterion encountered a real success in the evaluation of multiaxial fatigue lives of rubber components. Zine et al. (2006, 2011) observed the influence of the loading’s kinematics on this criterion. Harbour et al. (2007, 2008) realized multiaxial fatigue tests, with a sequence of loading blocks to develop then an approach of linear damage rule (Miner), and used the CED as the damaging parameter. Jeong et al. (2005) used the CED to predict the fatigue lives of tires, using a Finite Element Model on the fatigue crack growth approach. Alshuth & Abraham (2002) proposed the SED as an interesting fatigue criterion, that is able to unify tension fatigue results with an EPDM rubber. Inspired
The aim of this work is to develop a finite element model of a dumbbell structure, subjected to multiaxial cyclic loading. The model investigated in this paper is based from the work of Holzapfel (1996a) and has to be able to evaluate dissipative mechanical phenomenon present in rubber components. Dissipated Energy Density, Cracking Energy Density and Strain Energy Density are then calculated for each experimental multiaxial fatigue conditions explored by Poisson et al. (2011), at a specified node of the model. Dissipated Energy Density is then compared with the other Energy Densities as a multiaxial fatigue criterion. Results will be finally commented in the last part of this paper.
