Damage Model in Open Al Foams

AbstractIn this paper, we propose a damage accumulation model for open cell aluminum metal foams subjected to fully reversed cyclic loading based on three different approaches: linear, quadratic and exponential. Toward this aim, an analysis of the fatigue behavior and a failure criterion are necessary. The fatigue behavior will be analyzed using the well known statistical Weibull model, and the failure criteria considered for the analysis correspond to a criteria previously published that relates the tensile and compression pre peak slope of the hysteresis curve. The proposed models; linear, quadratic and exponential, allows us to obtain directly the damage accumulation in open cell metal foams as a function of the number of cycles applied, the total strain amplitude, and the initial value of the damage accumulatio