Dynamic behavior of spider β-sheet nanocrystalline inspired honeycomb structures

被引：0
|
作者：
Fang Z. [1 ]
Feng J. [1 ]
Chen C. [1 ]
Li Z. [1 ]
Wu Z. [1 ]
机构：
[1] School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing
来源：
Wu, Zhilin | 1600年 / Chinese Vibration Engineering Society卷 / 39期
关键词：
Dynamic zero Poisson's ratio; In-plane impact; Plateau stress; Β-sheet nanocrystalline;
D O I：
10.13465/j.cnki.jvs.2020.16.007
中图分类号：
学科分类号：
摘要：
The major ampullate silk possess excellent mechanical properties and its β-sheet nanocrystalline plays a crucial role in micro-scale. Inspired by its structure, a new type of honeycomb topology was abstracted. Through simulation and theoretical analysis, it was found that the β-sheet nanocrystalline inspired honeycomb has abundant and unique deformation modes. At high impact velocity, this new honeycomb has zero Poisson's ratio due to re-entrant angel's inward depression and hypotenuse's bend. At low impact velocity, the deformation mechanism is cell's overall rotation and tensile deformation. Because of this deformation mechanism, there are two plateau stress periods in response curve. Furthermore, the deformation mode map of the structure was given, and the plateau stress formula was obtained. According to the stress characteristics, the plateau stress formula of cellular honeycomb structure under rotating deformation mechanism was proposed. The energy absorption capacity of this honeycomb is approximate to hexagonal honeycomb. It can provide a choice for protection occasions against transverse deformation. © 2020, Editorial Office of Journal of Vibration and Shock. All right reserved.
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页码：46 / 54
页数：8
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