加载角度对6082铝合金自冲铆接接头疲劳性能及失效模式的影响

doi:10.3969/j.issn.1004-132X.2025.01.015

中国机械工程 ›› 2025, Vol. 36 ›› Issue (01): 141-151.DOI: 10.3969/j.issn.1004-132X.2025.01.015

加载角度对6082铝合金自冲铆接接头疲劳性能及失效模式的影响

雷付煜¹;徐小旭²;赵亚明²;罗军¹;马超¹;徐从昌¹*;李落星¹³

1.湖南大学机械与运载工程学院，长沙，410082
2.阿维塔科技有限公司，重庆，401120
3.湖南大学重庆研究院，重庆，401121

出版日期:2025-01-25 发布日期:2025-03-06
作者简介:雷付煜，女，2000年生，硕士研究生。研究方向为汽车车身异种材料连接。发表论文1篇。E-mail:1248272938@qq.com。
基金资助:
国家自然科学基金（52272362）；重庆市技术创新与应用发展专项重点项目（CSTB2022TIAD-KPX0035）；湖南创新型省份建设专项（2021GK4044）

Influences of Loading Angle on Fatigue Characteristics and Failure Modes of Self-piercing Riveted Joints in Aluminum Alloy 6082

LEI Fuyu¹;XU Xiaoxu²;ZHAO Yaming²;LUO Jun¹;MA Chao¹;XU Congchang¹*;LI Luoxing¹³

1.College of Mechanical and Vehicle Engineering,Hunan University,Changsha,410082
2.AVATR Technology Co.,Ltd.,Chongqing,401120
3.Research Institute of Hunan University in Chongqing,Chongqing,401121

Online:2025-01-25 Published:2025-03-06

摘要/Abstract

摘要： 以6082铝合金自冲铆接为研究对象，采用拉伸试验、疲劳试验、扫描电镜观测等手段研究了接头疲劳裂纹扩展机理和微动磨损行为。结果表明：相较于0°、45°，加载角度90°的接头具有最优的静力学性能；在同一载荷水平下，接头疲劳寿命随加载角度的增大而增大；高周疲劳下的接头失效为下板开裂失效，低周疲劳下的接头失效为上板开裂和铆钉断裂；微动磨损影响接头疲劳裂纹的萌生位置和扩展路径，接头加载角度影响接头不同区域的微动磨损程度，加载角度90°的铆钉头部与上层板接触区域、加载角度0°的下板与铆钉腿表面接触区域的微动磨损最严重。

关键词: 铝合金, 自冲铆接, 加载角度, 疲劳性能, 微动磨损

Abstract: Taking the self-piercing riveting of 6082 aluminum alloy as the research object, the fatigue crack propagation mechanism and fretting wear behavior of the joints were studied by tensile tests, fatigue tests and scanning electron microscopy. The results show that compared to the 0° and 45°, the joint has the best static mechanics properties under the loading angle of 90°. Under the same load level, the fatigue life of the joints increases with the increase of the loading angles. Under high-cycle fatigue, the joints fail by cracking of the lower plate, while under low-cycle fatigue, the joints fail by cracking of the upper plate and rivet fracture. Fretting wear affects the location and propagation path of the fatigue crack initiation in the joints, and the loading angles of the joints affect the fretting wear in different areas of the joints. Under the loading angle of 90°, the fretting wear in the contact areas between rivet head and upper plate is the most serious. Under the loading angle of 0°, the fretting wear in the contact areas between lower plate and surface of the rivet leg is the most serious.

Key words: aluminum alloy, self-piercing riveting, loading angle, fatigue property, fretting wear

中图分类号:

TH131.1

雷付煜1, 徐小旭2, 赵亚明2, 罗军1, 马超1, 徐从昌1, 李落星13. 加载角度对6082铝合金自冲铆接接头疲劳性能及失效模式的影响[J]. 中国机械工程, 2025, 36(01): 141-151.

LEI Fuyu1, XU Xiaoxu2, ZHAO Yaming2, LUO Jun1, MA Chao1, XU Congchang1, LI Luoxing13. Influences of Loading Angle on Fatigue Characteristics and Failure Modes of Self-piercing Riveted Joints in Aluminum Alloy 6082[J]. China Mechanical Engineering, 2025, 36(01): 141-151.

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链接本文: https://www.cmemo.org.cn/CN/10.3969/j.issn.1004-132X.2025.01.015

https://www.cmemo.org.cn/CN/Y2025/V36/I01/141

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加载角度对6082铝合金自冲铆接接头疲劳性能及失效模式的影响

Influences of Loading Angle on Fatigue Characteristics and Failure Modes of Self-piercing Riveted Joints in Aluminum Alloy 6082

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