A numerical study of bioinspired nacre-like composite plates under blast loading

被引：64

作者：

Flores-Johnson, E. A. ^{[1
]}

Shen, Luming ^{[1
]}

Guiamatsia, Irene ^{[1
]}

Nguyen, Giang D. ^{[2
]}

机构：

[1] Univ Sydney, Sch Civil Engn, Sydney, NSW 2006, Australia

[2] Univ Adelaide, Sch Civil Environm & Min Engn, Adelaide, SA 5005, Australia

来源：

COMPOSITE STRUCTURES | 2015年 / 126卷

基金：

澳大利亚研究理事会; 中国国家自然科学基金;

关键词：

Bioinspired composite; Layered plates; Blast loading; Cohesive interface; Finite-element simulation; BALLISTIC PERFORMANCE; MECHANICAL-PROPERTIES; BIOLOGICAL-MATERIALS; BEHAVIOR; STRESS; MODEL;

D O I：

10.1016/j.compstruct.2015.02.083

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

In this paper, a multi-layered composite inspired by the hierarchical structure of nacre and made of layers of aluminium alloy AA 7075 bonded with toughened epoxy resin is introduced for blast resistant applications. The performance of the proposed nacre-like 3.3-mm and 5.4-mm thick composite plates, made of 1.1-mm thick AA 7075 layers, under localised impulsive loading was numerically studied. The epoxy material was modelled using user-defined interface cohesive elements that properly take into account both strength and toughness enhancements under compression. As compared to bulk plates, the improvement in blast resistance performance was numerically observed in the nacre-like plates, which required larger loads to reach the onset of failure. In addition, a reduction of the peak velocity and maximum deflection of the back face was observed for the nacre-like plates. This improvement is explained by the hierarchical structure facilitating a globalised energy absorption by inter-layer interlocking, delamination and friction. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：329 / 336

页数：8

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