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.
引用
收藏
页码：46 / 54
页数：8
相关论文
共 27 条
  • [21] (2012)
  • [22] (2003)
  • [23] LU Zixing, WU Wenbo, Numerical simulations for the in-plane dynamic crushing of honeycomb material with negative poisson's ratio based on rotating triangle model, Acta Armamentarii, 39, 1, pp. 153-160, (2018)
  • [24] HAN Huilong, ZHANG Xinchun, WANG Peng, Dynamic responses and energy absorption properties of honeycombs with negative Poisson's ratio (NPR), Explosion and Shock Waves, 39, 1, pp. 44-54, (2019)
  • [25] LI Z, WANG T, JIANG Y, Et al., Design-oriented crushing analysis of hexagonal honeycomb core under in-plane compression, Composite Structures, 187, pp. 429-438, (2018)
  • [26] QIU X, ZHANG J, YU T., Collapse of periodic planar lattices under uniaxial compression, Part Ⅱ: dynamic crushing based on finite element simulation, International Journal of Impact Engineering, 36, 10, pp. 1231-1241, (2009)
  • [27] QIAO J, CHEN C., In-plane crushing of a hierarchical honeycomb, International Journal of Solids & Structures, 85, 86, pp. 57-66, (2012)
123