碳纤维增强聚合物复合材料车身T型接头静态性能与失效机制

许现哲; 刘通; 王文丽; 侯文彬

doi:10.13801/j.cnki.fhclxb.20181114.001

碳纤维增强聚合物复合材料车身T型接头静态性能与失效机制

大连理工大学汽车工程学院运载工程与力学学部工业装备结构分析国家重点试验室, 大连 116024

基金项目: 中央高校基本科研业务费（DUT19ZD222）；工业装备结构分析国家重点实验室自主课题（S18108）

详细信息

通讯作者:
侯文彬,教授,博士生导师,研究方向为车身轻量化,E-mail:houwb@dlut.edu.cn

中图分类号: TB332
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出版历程
- 收稿日期: 2018-09-28
- 刊出日期: 2019-10-14

Performance and failure mechanics of carbon fiber reinforced polymer composite T-joint in quasi-static loading for automobile structures

State Key Laboratory of Structural Analysis for Industrial Equipment, Faculty of Vehicle Engineering and Mechanics, School of Automotive Engineering, Dalian University of Technology, Dalian 116024, China

摘要

摘要: 通过解析预测、有限元分析和试验手段对热塑性碳纤维增强聚合物复合材料（CFRP）T型接头的面外弯曲和弯扭耦合力学性能进行研究，分析了T型接头的结构失效形式与力-位移曲线的关系，并将解析模型、有限元仿真与试验结果进行对比。在弯曲刚度方面，解析模型、有限元分析结果相对试验结果的刚度误差分别为4.7%和0.5%。在弯扭耦合刚度方面，解析模型及有限元仿真的结果相对试验结果的弯扭耦合刚度误差分别为6.9%和9.6%。试验结果表明，CFRP层合板的渐进失效引起T型接头弯曲刚度的衰减，当力达到2 047 N时接头开始发生失效，失效形式包括纤维的断裂、缠绕、树脂的压碎及纤维和树脂的分层等。
- 热塑碳纤维增强聚合物复合材料(CFRP) /
- 单冒型T型接头 /
- 力学性能 /
- 理论预测 /
- 有限元分析 /
- 弯扭耦合
Abstract: This paper presents an analytical, finite element and experimental study on the mechanical behavior of thermoplastic carbon fiber reinforced polymer (CFRP) T-joint subjected to out-of-plane bending and bending-torsion coupling. The relationship between failure mode and load-displacement curve was analyzed. The analytical, finite element and experimental results were compared. In bending test, the stiffness discrepancies in analytical and finite element model compared to that in the experiment are 4.7% and 0.5%, respectively. In bending-torsion test, the stiffness discrepancies in analytical and finite element model compared to that in the experiment are 6.9% and 9.6%, respectively. The results in the experiment show that the progressive damage of CFRP laminate causes the damping of transverse bending stiffness of the T-joint. The T-joint begins to fail when the force reaches 2 047 N. The failure results include matrix cracking, matrix/fiber deboning of transverse fibers, delimitation and fiber breakage leading to transverse rupture.
- thermoplastic carbon fiber reinforced polymer (CFRP) /
- single hat-shaped T-joint /
- mechanical behavior /
- analytical model /
- finite element analysis /
- bending-torsion coupling

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