预紧力对复合材料胶螺混合连接结构拉伸性能研究

doi:10.19936/j.cnki.2096-8000.20230728.010

复合材料科学与工程 ›› 2023, Vol. 0 ›› Issue (7): 72-78.DOI: 10.19936/j.cnki.2096-8000.20230728.010

预紧力对复合材料胶螺混合连接结构拉伸性能研究

黎海银¹, 郑国彦², 王乐乐¹, 齐佳旗¹, 郑艳萍^1*

1.郑州大学机械与动力工程学院, 郑州 450001;
2.郑州电力高等专科学校, 郑州 450000

收稿日期:2022-06-17 发布日期:2023-08-22
通讯作者: 郑艳萍(1975—),女,副教授,硕士生导师,主要从事复合材料结构强度方面的研究,ypzheng@126.com。
作者简介:黎海银(1997—),男,硕士研究生,主要从事复合材料连接结构力学性能方面的研究。
基金资助:
河南省高校重点科研项目(20A460023);国家自然科学基金(U1833116)

Study on tensile properties of composite glue-screw hybrid connection structure with preload

LI Haiyin¹, ZHENG Guoyan², WANG Lele¹, QI Jiaqi¹, ZHENG Yanping^1*

1. School of Mechanical and Power Engineering, Zhengzhou University, Zhengzhou 450001, China;
2. Zhengzhou Electric Power College, Zhengzhou 450000, China

Received:2022-06-17 Published:2023-08-22

摘要/Abstract

摘要： 本文在试验验证仿真模型可行性的基础上,通过数值模拟方法分析了CFRP/钛合金螺栓连接和胶螺混合连接结构中单钉单搭模式下预紧力对接头承载能力的影响。结果表明:对于CFRP/钛合金螺栓连接结构,预紧力的施加能够有效提升接头的失效载荷,施加2 N·m拧紧力矩和施加3.5 N·m拧紧力矩比施加0.5 N·m拧紧力矩的接头失效载荷分别提高了11.4%和13.19%;对于CFRP/钛合金胶螺混合连接结构,预紧力对失效载荷的提升较螺栓连接有所减弱,但胶层的刚度下降率(SDEG)仿真结果表明,预紧力可以有效降低胶层剥离应力的扩散,减缓胶层的失效。

关键词: 胶螺混合连接接头, 螺栓预紧力, 单钉单搭结构, 胶层失效, 复合材料

Abstract: On the basis of experimental verification of the feasibility of the simulation model, this paper analyzes the influence of pre-tightening force on the bearing capacity of CFRP/titanium alloy bolted connection and hybrid (bonded/bolted) connection structure under the mode of single nail and single lap. The results show that for CFRP/ titanium alloy bolted connection structure, the application of pre-tightening force can effectively increase the failure load of the joint, and the failure load of the joint with 2 N·m tightening torque and 3.5 N·m tightening torque is increased by 11.4% and 13.19% respectively, compared to that with 0.5 N·m tightening torque. For CFRP/ titanium alloy hybrid (bonded/bolted) connection structure, the increase of the failure load by pre-tightening force is weaker than that by bolt connection, but the simulation results of the scalar stiffness degradation (SDEG) of the adhesive layer show that the pre-tightening force can effectively reduce the diffusion of the peeling stress of the adhesive layer and slow down the failure of the adhesive layer.

Key words: hybrid (bonded/bolted) joint, bolt preload, single lap joint, adhesive layer failure, composites

中图分类号:

TB332

黎海银, 郑国彦, 王乐乐, 齐佳旗, 郑艳萍. 预紧力对复合材料胶螺混合连接结构拉伸性能研究[J]. 复合材料科学与工程, 2023, 0(7): 72-78.

LI Haiyin, ZHENG Guoyan, WANG Lele, QI Jiaqi, ZHENG Yanping. Study on tensile properties of composite glue-screw hybrid connection structure with preload[J]. COMPOSITES SCIENCE AND ENGINEERING, 2023, 0(7): 72-78.

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预紧力对复合材料胶螺混合连接结构拉伸性能研究

Study on tensile properties of composite glue-screw hybrid connection structure with preload

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