Abstract
A computational modelling of the low-cycle fatigue behaviour of lotus-type porous material subjected to multiaxial loading cycles is presented in this paper. The considered computational models have the same porosity but different pore topology patterns. Multiaxial loading conditions in the direction perpendicular to the longitudinal axis of pores are assumed to be proportional (in-phase) and non-proportional (out-of-phase) loading paths in numerical simulation. The fatigue life analysis is performed using a damage initiation and evolution law, based on the inelastic strain energy approach. The computational results show that a different fatigue life is obtained in the models with the same porosity but with different pore topology at the same loading level. Furthermore, the results of computational simulations show a qualitative understanding of the loading path on low-cycle fatigue failures of lotus-type porous material under multiaxial loading conditions.
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