锻压技术

多铆钉自冲铆试件的力学性能和失效形式

英文标题：Mechanical properties and failure modes on SPR specimens with multiple rivets

作者：张奥1 2 肖钢1 赵伦1 李激光2 叶凯1 张昊含3 张兰1 卢杰豪1 2

单位：1. 深圳职业技术大学超声技术研究所 2.辽宁科技大学材料与冶金学院 3.云南开放大学机电工程学院

分类号：TH131.1

出版年,卷(期):页码：2024,49(8):132-137

摘要：

为探究铆钉数量及排布对AA5052铝合金自冲铆试件力学性能和失效形式的影响，制备9种铆钉数量和2种不同铆钉排布共15组自冲铆试件。通过拉伸-剪切试验得到试件的峰值载荷和能量吸收值,并进行对比，分析试件的力学性能；分析试件的宏观失效形式，并采用扫描电子显微镜对断口进行观察，分析其失效机理。结果表明：铆钉数量会影响试件的力学性能和失效形式，铆钉排布仅影响试件的力学性能。试件的峰值载荷和能量吸收值随铆钉数量的增大先增大后减小；铆钉数量相同时，铆钉纵向排布的试件可以获得更好的力学性能。铆钉数量＜6时，试件的失效形式为铆钉拔出，越靠近板材的边缘，铆钉对板材的破坏程度越大；铆钉数量≥6时，试件的失效形式为板材断裂并且断口处有大量韧窝，越靠近铆钉，韧窝越浅且越小。

To investigate the influence of rivet quantity and arrangement on the mechanical properties and failure modes of AA5052 aluminum alloy self-piercing riveting (SPR) specimens, fifteen sets of SPR specimens with nine types of rivet quantity and two types of rivet arrangements were prepared. The mechanical properties of the specimens were analyzed by comparing the peak load and energy absorption values of the specimens obtained from the tensile and shear experiment. Then, the macroscopic failure mode of the specimens were analyzed，and the fracture was observed by SEM to research the failure mechanism of the specimens. The results show that the rivet quantity affects both the mechanical properties and failure mode of the specimens, while the rivet arrangement only affects the mechanical properties of the specimen. The peak load and energy absorption values of the specimens increase first and then decrease with the increasing of the rivet quantity. When the rivet quantity is same, the specimen with rivet longitudinal arrangement can achieve better mechanical properties. When the rivet quantity is less than six, the failure mode of the specimen is rivet pulling out, and the closer it is to the edge of the sheet, the greater the damage of the rivet to the sheet. When the rivet quantity is equal to or greater than six, the failure mode of the specimen is fracture of sheet with a large number of ductile dimples at the fracture, and the closer to the rivets, the shallower and smaller the ductile dimples.

基金项目：

国家自然科学基金资助项目(12104324)；深圳职业技术大学高端人才科研启动项目（6022310046k）；深职大-新栋力超声波焊接技术研发中心项目（602331009PQ）；深圳职业技术大学博士后出站后期资助项目(4103-6023271014K1)

作者简介：张奥（2000-）,男,硕士研究生 E-mail：zhangao2514@163.com 通信作者：肖钢（1973-）,男,硕士,副教授 E-mail：xiaosteel@szpu.edu.cn

参考文献：

[1]He X C, Pearson I, Young K. Self-pierce riveting for sheet materials: State of the art[J]. Journal of Materials Processing Technology, 2008, 199(1-3): 27-36.

[2]王付才,陆卫中,杨海.轻量化汽车自冲铆接头腐蚀行为的研究进展[J].材料保护,2021,54(8):132-138.

Wang F C, Lu W Z, Yang H. Research progress on corrosion behavior of lightweight automobile self-piercing riveting joint [J]. Materials Protection, 2021,54 (8): 132-138.

[3]赵伦,何晓聪,卢毅,等. 基板厚度对自冲铆接头静力学性能的影响及其失效机理 [J]. 热加工工艺, 2015, 44 (17): 1-5.

Zhao L, He X C, Lu Y, et al. Influence of basilar sheet thickness on static performance of self-piercing riveted joints and its failure mechanism [J]. Hot Working Technology, 2015, 44 (17): 1-5.

[4]张娜,李海鹏,葛广跃,等.车身轻量化设计方法及应用 [J]. 汽车实用技术, 2022, 47 (10): 179-183.

Zhang N, Li H P, Ge G Y, et al. Lightweight design methods and applications of body[J]. Automobile Applied Technology, 2022,47(10):179-183.

[5]何晓聪,何家宁,柯建宏,等.自冲铆接接头的质量评价[A].2010年中国汽车车身技术国际研讨会论文集[C]. 长沙, 2010.

He X C, He J N, Ke J H, et al. Quality evaluation of self-piercing riveted joints[A]. Proceedings of the 2010 China International Symposium on Automotive Body Technology[C]. Changsha, 2010.

[6]Zhao L, He X C, Lu Y. Study on clinching of titanium alloy[J]. Applied Mechanics and Materials, 2014, 633-634:86-89.

[7]Xing B Y, He X C, Zeng K, et al. Mechanical properties of self-piercing riveted joints in aluminum alloy 5052 [J]. The International Journal of Advanced Manufacturing Technology, 2014, 75 (1-4): 351-361.

[8]Yan W M, Mu T T, Xie Z Q, et al. Experimental investigation of typical connections for fabricated cold-formed steel structures[J].Advances in Structural Engineering, 2019,22(1): 141-155.

[9]郭子鑫,赵伦,郭媛媛,等. 航空铝合金薄板自冲铆接头静力学性能的研究 [J]. 热加工工艺, 2024, 53(9): 39-44.

Guo Z X, Zhao L, Guo Y Y, et al. Study on static mechanical performance of self-piercing riveted joints of aviation aluminum alloy sheets [J]. Hot Working Technology, 2024, 53(9): 39-44.

[10]GB/T 16957—2012, 复合钢板焊接接头力学性能试验方法[S].

GB/T 16957—2012, Mechanical tests on welded joints in clad plates [S].

[11]雷乐,赵伦,高山凤，等.铝钛异种薄板冷连接工艺及力学性能研究 [J].锻压技术,2023,48 (7):100-106.

Lei L, Zhao L, Gao S F, et al. Cold joining process and mechanical property study for Al-Ti dissimilar [J]. Forging & Stamping Technology, 2023,48 (7): 100-106.

[12]丁文有,何晓聪,邢保英，等.铆向组合对双铆钉自冲铆接头力学性能的影响 [J]. 塑性工程学报, 2018, 25 (5): 234-239.

Ding W Y, He X C, Xing B Y, et al. Effect of riveting orientation combination on mechanical properties of double rivet self-piercing riveted joint[J]. Journal of Plasticity Engineering, 2018, 25 (5): 234-239.

服务与反馈：

【文章下载】【加入收藏】