Quasi-static axial crushing and transverse bending of double hat shaped CFRP tubes
Quasi-static axial crushing and transverse bending of double hat shaped CFRP tubes
复制标题
双帽形CFRP管的准静态轴向挤压和横向弯曲
DOI：
10.1016/j.compstruct.2014.06.024
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发表时间：
2014-11-01
影响因子：
6.3
通讯作者：
Li, Qing
中科院分区：
文献类型：
--
作者：
Liu, Qiang;Xing, Huanlin;Li, Qing
研究编织碳纤维复合材料（CFRP）双帽形管在准静态轴向压溃和横向弯曲载荷作用下的失效模式和耐撞性特性。对三种不同壁厚的气囊成型复合材料管进行了实验研究。在轴向压溃试验中观察到三种不同的破坏模式，即渐进式端部压溃（I）、不稳定局部屈曲（II）和中间长度压溃（III），而在横向弯曲试验中只观察到一种类似的渐进式压溃模式。结果表明，厚度是一个关键参数影响的破坏模式和能量吸收能力，导致在峰值载荷和比能量吸收（SEA）在测试过程中的增加。双帽形管的轴向压缩比为60 ~ 90 J/g，略高于普通截面CFRP管，但比普通金属管高2倍以上。相比之下，在横向弯曲下的管的承载能力和能量吸收能力远低于轴向压缩管的承载能力和能量吸收能力（分别小于10%和1%）。(C)2014爱思唯尔有限公司版权所有。
This paper aims to explore the failure modes and crashworthiness characteristics of double hat shaped tubes made of weave carbon fiber reinforced plastic (CFRP) subjected to quasi-static axial crushing and transverse bending. Experimental investigations were carried out into three different thicknesses of the composite tubes fabricated by the bladder molding process. Three distinct failure modes, classified as progressive end crushing (I), unstable local buckling (II) and mid-length collapse (III), were observed in the axial crushing tests, whereas only one similar progressive collapse mode was observed in transverse bending tests. It is shown that the thickness is a critical parameter affecting the failure mode and energy absorption capability, leading to the increase in the peak load and specific energy absorption (SEA) during the tests. The SEA of the tested double hat shaped tubes under axial crushing ranges from 60 to 90 J/g, which is marginally higher than that of regular sectional CFRP tubes but over 2 times of that of conventional metallic tubes. By comparison, the load bearing and energy absorption capabilities of the tubes under transverse bending are much lower than those of the axially compressed tubes (less than 10% and 1%, respectively). (C) 2014 Elsevier Ltd. All rights reserved.