Dynamic crash responses of bio-inspired aluminum honeycomb sandwich structures with CFRP panels
Dynamic crash responses of bio-inspired aluminum honeycomb sandwich structures with CFRP panels
复制标题
CFRP 板仿生铝蜂窝夹层结构的动态碰撞响应
DOI：
10.1016/j.compositesb.2017.03.030
复制
发表时间：
2017-07-15
影响因子：
13.1
通讯作者：
Hui, David
中科院分区：
文献类型：
--
作者：
Wu, Yinghan;Liu, Qiang;Hui, David
大自然为我们提供了非凡的资源来应对当今社会面临的设计挑战。受动物壳启发的多状态结构已被证明能有效地提高复合材料层合板的抗冲击性能。本研究旨在探讨由碳纤维强化塑胶板与铝蜂窝板所组成的仿生夹层结构的碰撞反应与适撞性特性。研究了碰撞响应、失效模式以及芯体边长、高度和碰撞速度对峰值载荷和能量吸收的影响。定量分析了CFRP铝蜂窝夹层结构与CFRP裸板耐撞性的差异。试验中观察到两种典型的荷载-位移曲线，即单峰曲线和双峰曲线。在能量-位移曲线中，上、下面板破坏阶段的斜率均大于蜂窝破坏阶段的斜率，表明裸铝蜂窝的能量吸收能力低于CFRP面板。相比之下，蜂窝填充是提高CFRP结构抗冲击性能的有效途径，具有较高的能量吸收和较低的冲击峰值载荷。结果还发现，耐撞性特性是更敏感的核心长度比核心高度;和比能量吸收（SEA）的变化与核心高度的增加不显着。结果表明，在高冲击速度下，峰值载荷、吸收能量和SEA显著增加。(C)2017爱思唯尔有限公司版权所有
Nature has provided us with extraordinary resources to tackle design challenges facing in modern society nowadays. The multistate structures inspired by animal shell have proven effective to improve the impact resistance of composite laminate. This study aims to identify the crash responses and crash worthiness characteristics of bio-inspired sandwich structures composed of carbon fiber reinforced plastic (CFRP) panels and aluminum honeycomb. The crash responses, failure mode as well as the effects of core side length, height and impact velocity on peak load and energy absorption were explored herein. The differences of crashworthiness characteristics between the CFRP aluminum honeycomb sandwiches and bare CFRP panel were quantified. Two typical load-displacement relations, namely single-peak and double-hump curves, were observed in the tests. It was noted in the energy-displacement curve, where the slopes corresponding to the failure stages of the upper and lower face-sheets, were greater than that in the honeycomb failure stage, indicating that the bare aluminum honeycomb was of lower energy absorption capacity than the CFRP face-sheet. By comparison, the honeycomb filling was an effective way to improve the impact resistance of CFRP structure, yielding higher energy absorption and lower peak load during the impact. It was also found that the crashworthiness characteristics were more sensitive to the core length than to the core height; and the specific energy absorption (SEA) varied insignificantly with the increase in the core height. It was noted that the peak load, absorbed energy and SEA increased significantly under high impact velocity. (C) 2017 Elsevier Ltd. All rights reserved.