动态异面压缩下铝蜂窝平均坍塌应力分析与试验验证

In order to study the mean plastic crushing stress of aluminum honeycombs under dynamic out-of-plane compression, based on the theoretical study on quasi-static compression of aluminum honeycombs, the influence of the aluminum honeycomb strain rate effect on the mechanical properties of the material is considered. Using the Cowper-Symonds model and taking the basic folding element as the research object, the equivalent perimeter method is used to obtain the strain rate. Two theoretical calculation formulae of the mean plastic crushing stress of aluminum honeycombs under dynamic out-of-plane compression are given. The drop hammer impact test results and simulation results show that the correlation coefficient between the dynamic mean plastic crushing stress under the Tresca yield criterion and the experimental stress or simulation stress is above 98%, which verifies the correctness of the theoretical derivation. The theoretical calculation formulae given in this paper have certain engineering guiding significance for studying the out-of-plane compression performance of aluminum honeycombs under dynamic impact.