Abstract
In this paper, the experimental and theoretical studies on the uniaxial compressive cyclic loading process of a kind of bumper foams are presented. The uniaxial cyclic loading tests are conducted to investigate the influence of the geometrical dimension and the displacement rate on the mechanical behavior of specimen. The influences of preloading process are analyzed experimentally and the residual strains are then discussed. At the same time, a modified pseudo-elastic model considering the residual strain is given to describe the unloading behavior and realized with the finite element method. The numerical results demonstrate that the present model is suitable to describe the unloading behavior of a kind of bumper foam. The limitations of this model are finally discussed.
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