In-plane dynamic crushing of a novel arc-shaped reentrant structure

AbstractThis study proposes a novel structure through bionic design, exhibiting a negative Poisson’s ratio, high stability, and energy absorption properties. The structural responses of both the conventional and novel honeycombs under dynamic impacts are obtained through simulation, characterizing their deformation modes and mechanical properties. The results show that the novel structure exhibits almost no localized densification, significantly reduced stress fluctuation, and a notable reduction in peak stress, differing significantly from the conventional structure. Furthermore, considering the NPR effect at medium and high speeds, the platform stress solution is derived, confirming the high stability of the novel honeycomb structure.Keywords: Negative Poisson's ratiohoneycombstabilitylightweightdynamic impactdeformation Disclosure statementNo potential conflict of interest was reported by the authors.Additional informationFundingThis work is supported by the National Natural Science Foundation of China (No. 12272257), the Natural Science Foundation of Shanxi Province (No. 202203021211169), and the opening project of State Key Laboratory of Explosion Science and Technology (Beijing Institute of Technology) (KFJJ22-14M).