结构参数对CFRP三螺栓胶螺混合接头连接性能的影响研究

doi:10.19936/j.cnki.2096-8000.20230928.010

复合材料科学与工程 ›› 2023, Vol. 0 ›› Issue (9): 67-72.DOI: 10.19936/j.cnki.2096-8000.20230928.010

结构参数对CFRP三螺栓胶螺混合接头连接性能的影响研究

杨晓东, 时建纬, 陈栋, 李成^*

郑州大学机械与动力工程学院,郑州450001

收稿日期:2022-08-17 出版日期:2023-09-28 发布日期:2023-10-20
通讯作者: ^*李成(1962—),男,教授,博士生导师,主要从事复合材料损伤分析和复合材料损伤检查方面的研究,chengli@zzu.edu.cn。
作者简介:杨晓东(1996—),男,硕士研究生,主要从事智能复合材料结构分析与优化设计方面的研究。
基金资助:
国家自然科学基金(52175153);河南省水下智能装备重点实验室开放基金(ZT22064U)

Research on the influence of structural parameters on the joint performance of hybrid bonded-bolted joint for CFRP with three bolts

YANG Xiaodong, SHI Jianwei, CHEN Dong, LI Cheng^*

School of Mechanical and Power Engineering, Zhengzhou University, Zhengzhou 450001, China

Received:2022-08-17 Online:2023-09-28 Published:2023-10-20

摘要/Abstract

摘要： 通过实验和数值模拟研究了不同结构参数对三螺栓的碳纤维增强复合材料(CFRP)胶螺混合接头连接性能的影响机制。建立了基于三维Hashin失效准则的有限元模型,并借助超景深设备Keyence VHX-6000对接头的失效区域进行观测,探究了搭接长度、螺栓孔间距和间隙配合关系对接头连接性能的影响。结果表明:增加搭接长度能够使接头的受力分布由接头边缘向中间转移,使接头性能提升了29.9%;减小螺栓孔间距能够提高接头两端胶接区域的连接性能,使接头性能提升了15%;由于三螺栓受力不均,因此两端螺栓孔为间隙配合时,能够增加中间螺栓的受力,使接头性能提升了6.9%。接头的连接性能随着搭接长度的增加而增加,但是增速逐渐减小至零;随着螺栓孔间距的增加,接头的连接强度先缓慢增大后快速减小,最佳螺栓孔间距为15 mm;两端的螺栓为间隙配合时能够增加接头的连接性能,最佳螺栓孔直径为5.2 mm。

关键词: 复合材料, 胶螺混合接头, 结构参数, 连接性能, 失效行为

Abstract: The influence mechanism of different structural parameters on the joint performance of carbon fiber reinforced composite (CFRP) hybrid bonded-bolted joint with three bolts was investigated by experiments and numerical simulations. The finite element model based on the three-dimensional Hashin failure criterion was established, and the failure area of the joint was observed with the help of the ultra-depth of field device Keyence VHX-6000. The influence of lap length, bolt hole spacing and clearance fit relationship on the joint connection performance was explored. The results show that increasing the lap length can transfer the stress distribution from the edge of the joint to the middle of the joint, and improve the joint performance by 29.9%. Reducing the spacing of bolt holes can improve the connection performance of the bonding area at both ends of the joint, and the joint performance is increased by 15%. Because of the uneven force of the three bolts, so when the two bolt holes are clearance fit, the force of the middle bolt can be increased, and the joint performance is improved by 6.9%. The joint performance increases with the increase of lap length, but the growth rate gradually decreases to zero. With the increase of bolt hole spacing, the joint strength increases slowly at first and then decreases rapidly, and the optimal bolt hole spacing is 15 mm. When the bolts at both ends are clearance fit, the connection performance of the joint can be increased. The optimal bolt hole diameter is 5.2 mm.

Key words: composite material, hybrid bonded-bolted joint, structural parameters, connection performance, damage behavior

中图分类号:

TB332

杨晓东, 时建纬, 陈栋, 李成. 结构参数对CFRP三螺栓胶螺混合接头连接性能的影响研究[J]. 复合材料科学与工程, 2023, 0(9): 67-72.

YANG Xiaodong, SHI Jianwei, CHEN Dong, LI Cheng. Research on the influence of structural parameters on the joint performance of hybrid bonded-bolted joint for CFRP with three bolts[J]. COMPOSITES SCIENCE AND ENGINEERING, 2023, 0(9): 67-72.

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结构参数对CFRP三螺栓胶螺混合接头连接性能的影响研究

Research on the influence of structural parameters on the joint performance of hybrid bonded-bolted joint for CFRP with three bolts

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