汽车工程

汽车工程 ›› 2019, Vol. 41 ›› Issue (1): 86-90.doi: 10.19562/j.chinasae.qcgc.2019.01.014

• • 上一篇    下一篇

车身碳纤维接头结构横向弯曲性能研究*

王海丰, 于野, 许现哲, 侯文彬   

  1. 大连理工大学汽车工程学院, 工业装备结构分析国家重点实验室,大连 116024
  • 收稿日期:2017-12-25 出版日期:2019-01-25 发布日期:2019-01-25
  • 通讯作者: 侯文彬,教授,博士生导师,E-mail:houwb@dlut.edu.cn。
  • 基金资助:
    *国家自然科学基金(11272077)和工业装备结构分析国家重点实验室自主课题(S15108)资助。

A Study on Transverse Bending Properties of CFRP Joint in Vehicle Body

Wang Haifeng, Yu Ye, Xu Xianzhe, Hou Wenbin   

  1. School of Automotive Engineering, Dalian University of Technology, State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian 116024
  • Received:2017-12-25 Online:2019-01-25 Published:2019-01-25

PDF (PC)

341

赞

摘要： 通过试验获取车身单帽型碳纤维增强复合材料T型接头的横向弯曲关键性能,分析结构失效模式对试验结果的影响;对试验过程进行有限元模拟,并与试验结果对比;在调整结构尺寸参数和铺层数目时,计算结构横向弯曲性能与质量的相对灵敏度。试验结果表明,层合板渐进损伤引起T型接头横向弯曲刚度衰减,T型接头下表面大面积失效导致结构最终失去承载能力;有限元分析结果与试验结果基本吻合;灵敏度分析结果显示,合理增大尺寸参数R和H,可以较小的质量增大代价获得明显的结构性能提升。

关键词: T型接头, 碳纤维复合材料, 横向弯曲性能, 灵敏度分析

Abstract: A test is carried out to obtain the key transverse bending properties of a single hat shaped T-joint material (carbon fiber reinforced polymer, CFRP), to analyze the effects of structural failure modes on test results, and the test process is then simulated by finite element analysis with its results compared with that of test. The relative sensitivities of transverse bending properties to the mass of T-joint are calculated during the adjustment of its structural dimension parameters and ply numbers. The results of test show that the gradual damage of laminate causes the reduction of transverse bending stiffness of T-joint, and the large-area failure on the lower surface of T-joint leads to the final loss of its load-bearing capability. The results of finite element analysis agree well with that of test. The results of sensitivity analysis show that reasonable increase of dimensional parameters R and H can achieve the significant enhancement of the structural performance of T-joint with a minor cost of a little weight-gain

Key words: T-joint, CFRP, transverse bending properties, sensitivity analysis