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• W2999428397 endingPage "100918" @default.
• W2999428397 startingPage "100918" @default.
• W2999428397 abstract "• A re-entrant arc-shaped honeycomb with negative Poisson’s ratio is proposed according to the concept of bio-inspired structure design. • The cell micro-topologies significantly affect the dynamic crushing behaviors of bio-inspired auxetic honeycombs under in-plane impact loading. • The bio-inspired auxetic honeycombs have better crushing load uniformity than conventionally re-entrant ones. • An empirical formula of plateau stress is derived to effectively evaluate the dynamic load-bearing capacity of bio-inspired honeycombs. In order to improve the impact energy absorption abilities and maintain good crushing load uniformity of auxetic honeycombs, a re-entrant arc-shaped honeycomb (RAH) model is proposed according to the concept of bio-inspired structure design. The in-plane impact resistances and absorbed-energy characteristics of bio-inspired auxetic RAHs subjected to a constant velocity crushing are numerically studied by using ABAQUS/EXPLICIT. It is shown that due to the introduction of re-entrant arc-shaped structures, the dynamic response curves of bio-inspired RAHs have better crushing load uniformity than conventional re-entrant honeycombs. Except for the relative density and impact velocity, the dynamic crushing behaviors of bio-inspired RAHs also depend upon the cell micro-structure parameters (e.g., the curvature). Based on the one-dimensional (1D) shock theory and absorbed-energy efficiency method, an empirical equation is deduced to evaluate the dynamic plateau stress of bio-inspired RAHs. The finite element (FE) results coincide well with those calculated by the empirical formulas. Moreover, the specific energy absorption (SEA) and energy dissipation rules of bio-inspired RAHs are discussed, which are also dependent on the curvature. These researches will provide technical support for the innovative structure design and dynamic optimization design of auxetic cellular structures." @default.
• W2999428397 created "2020-01-23" @default.
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• W2999428397 date "2020-06-01" @default.
• W2999428397 modified "2023-10-10" @default.
• W2999428397 title "Dynamic crushing responses of bio-inspired re-entrant auxetic honeycombs under in-plane impact loading" @default.
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• W2999428397 doi "https://doi.org/10.1016/j.mtcomm.2020.100918" @default.
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