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Influence of Pore Gas in Closed-Cell Cellular Structures under Dynamic Loading

M. Vesenjak, Prof. Z. Ren (University Maribor), A. Öchsner (University of Aveiro) New computational models of closed-cell cellular structures that account for the effects of gas inside the pores are described in this paper. The behaviour of cellular models under uniaxial impact loading and large deformations has been analyzed with the LS-DYNA code. Parametric computational simulations illustrate the effect of pore gas on macroscopic behaviour during deformation regarding the load type. Developed computational models provide insight into material behaviour undergoing large deformations under impact loading and provide grounds for optimization of cellular structure for different application requirements, e.g. crash absorbers.

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