In-plane dynamic crushing of re-entrant auxetic cellular structure

By Wangyu Liu, Ningling Wang, Tao Luo, Lin Zhenqiong. 2016

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In-plane crashworthiness of re-entrant hierarchical honeycombs with negative Poisson’s ratio (2019, background): “[13] compared the energy absorption abilities of the re-entrant auxetic honeycomb and the hexagonal honeycomb, and found that the re-entrant honeycomb can absorb more energy when subjected to the same magnitude of crushing strain.”
Review of Auxetic Materials for Sports Applications: Expanding Options in Comfort and Protection (2018, unknown): “Honeycomb sandwich panels with auxetic cores were found to resist ballistic impacts better than regular or rectangular cores [303], and absorb more impact energy when the re-entrant cell structure was non-uniform [304].”
Compressive properties of 3D printed auxetic structures: experimental and numerical studies (2020, background): “entrant and the conventional hexagonal honeycombs have been examined and compared (Hou, Deng, and Zhang 2016; Liu et al. 2016).”