Effect of trigger mechanisms on axial crushing response of composite energy-absorbing structures

被引：0

作者：

Chen D. ^{[1
]}

Xiao S. ^{[1
]}

Yang G. ^{[1
]}

Yang B. ^{[1
]}

Zhu T. ^{[1
]}

Wang M. ^{[1
]}

Deng Y. ^{[1
]}

机构：

[1] State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu

来源：

Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | 2022年 / 53卷 / 05期

基金：

中国国家自然科学基金; 中央高校基本科研业务费专项资金资助;

关键词：

Carbon fiber reinforced polymers; Crashworthiness; Energy-absorbing structure; Rail vehicles; Triggering mechanism;

D O I：

10.11817/j.issn.1672-7207.2022.05.025

中图分类号：

学科分类号：

摘要：

Considering its inter-ply and intra-ply mechanical properties, axial crushing finite element models of carbon fiber reinforced polymers(CFRP) tubes were established. Comparisons on tested failure modes and load-displacement relationships were conducted to validate the modelling methods. Considering their characteristics of energy-absorbing structures used in rail vehicles, the effects of trigger mechanisms on the axial crushing response of circular CFRP tubes were investigated using inward-splaying trigger(IS-T), outward-splaying trigger(OS-T), plug-type inward-splaying trigger(PT-IS-T) and plug-type outward-splaying trigger(PT-OS-T), separately. The results show that compared with the chamfer-end mechanism, the energy absorption efficiencies reduce approximately by 36.5% and 43.4% for the CFRP tubes under IS-T and OS-T, respectively. Plug-type triggers present excellent advantages to make full use of the destroyed CFRP bundles. The energy absorption and crushing failure mode of CFRP tubes are sensitive to the intracavity dimension parameter L for plug-type triggers. Increasing L from 8 mm to 16 mm is effective to improve the progressive crushing process, while the energy absorption performance initially increases and then decreases. The PT-IS-T with L=12 mm yields the highest energy absorption for the CFRP tube, approximately 63.1% higher than that of chamfer-end mechanism. The inward-splaying mode is more effective for achieving excellent energy absorption performance of CFRP tubes in the crashworthiness design of external triggers. © 2022, Central South University Press. All right reserved.

引用

页码：1804 / 1812

页数：8

共 21 条

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