Abstract
A finite element model is designed to obtain the mechanical parameters about cushioning property of multilayer regular triangular honeycombs under the in-plane crushing loadings with high impact velocities. A simplified energy absorption model is put forward to evaluate the energy absorption performance, which shows that the optimal energy absorption per unit volume is related to dynamic plateau stress and dynamic densification strain. Both depend on the configuration parameters of representative cell and impact velocity. From the physical analysis and discussion of the numerical results, the empirical formulas of dynamic densification strain and dynamic plateau stress are suggested in terms of configuration parameters and impact velocity. Based on these empirical formulas, a feasible cushioning optimization algorithm is put forward and presented.
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