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| Analysis of mechanical properties and corrosion behavior of self-piercing riveted-bonded composite joints in acidic environment |
Yuhao JIANG1( ),Baoying XING1(),Guiqiu YANG1,Kai ZENG1,Xiaocong HE1,Chunbao ZOU2 |
1.Faculty of Mechanical and Electrical Engineering, Kunming University of Science and Technology, Kunming 650500, China
2.Guangzhou Heron Intelligent Equipment Co. , Ltd. , Guangzhou 510990, China |
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Abstract To study the failure modes and mechanical properties of self-piercing riveted-bonded (SPR-bonded) composite joints in acidic environments, the 0.02 mol/L NaHSO3 solution was used as the corrosion medium to conduct dry-wet alternate immersion corrosion tests on similar and dissimilar SPR joints and SPR-bonded composite joints. Subsequently, the static mechanical properties of the joints under different corrosion cycles were explored through static tensile tests, and the corrosion behavior at the gaps during the riveting forming process of joints was studied by means of scanning electron microscope. The results showed that the corrosion effect had an impact on the failure displacement of the SPR joint, and the static strength and stiffness of the SPR-bonded composite joint were both superior to those of the SPR joint. The bonded structure was more sensitive to the corrosion effect, which gradually reduced the failure load of the SPR-bonded composite joint, resulting in the failure load of the SPR-bonded composite joint being borne by the riveted structure in the middle and later stages of corrosion. The dissimilar joints exhibited relatively poorer stability compared to similar joints. The incorporation of adhesive effectively inhibited the transformation of failure modes of dissimilar joints in corrosive environments. The adhesive had a certain inhibitory effect on the corrosion in the overlap area between the upper and lower plates of the joint. The scratches on the riveted hole wall of the upper plate would accelerate the corrosion at the contact surface between the outer side of the rivet tube leg and the upper plate. The selection of SPR-bonded composite joints helps to enhance the static strength and corrosion resistance of riveted structures, thereby prolonging their service life. The research results provide theoretical support for the application of riveting technology in acidic corrosive environments.
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Received: 19 November 2024
Published: 01 September 2025
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Corresponding Authors:
Baoying XING
E-mail: 15666750225@163.com;xbb0808@163.com
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酸性环境下自冲铆-粘接复合接头的力学性能及腐蚀行为分析
为分析酸性环境下自冲铆-粘接（铆-粘）复合接头的失效形式和力学性能，以0.02 mol/L的NaHSO3溶液作为腐蚀介质，对同质、异质的自冲铆接头和铆-粘复合接头进行干湿交替的周浸腐蚀试验，随后通过静力学拉伸试验对不同腐蚀周期下接头的静力学性能进行探究，并借助扫描电子显微镜对接头铆接成形过程中缝隙处的腐蚀行为进行研究。结果表明：腐蚀作用影响自冲铆接头的失效位移，铆-粘复合接头的静强度和刚度均优于自冲铆接头。粘接结构对腐蚀效应更为敏感，使得铆-粘复合接头的失效载荷逐渐减小，导致腐蚀中后期铆-粘复合接头的失效载荷由铆接结构承受；异质接头的稳定性比同质接头差，粘接剂的加入有效抑制了腐蚀环境下异质接头失效形式的转变。粘接剂对接头上板与下板间搭接区域的腐蚀有一定抑制作用，上板铆接孔壁的刮痕会加速铆钉管腿外侧与上板接触面处的腐蚀。选用铆-粘复合接头有助于提高铆接结构的静强度和耐腐蚀性能，延长了使用寿命。研究结果为铆接技术在酸性腐蚀环境中的应用提供了理论支持。
关键词：
自冲铆接,
腐蚀行为,
力学性能,
失效形式
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doi: 10.3785/j.issn.1006-754X.2025.04.181
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本文链接：
姜宇豪, 邢保英, 杨贵秋, 等. 酸性环境下自冲铆-粘接复合接头的力学性能及腐蚀行为分析[J]. 工程设计学报, 2025, 32(4): 523-531. doi:10.3785/j.issn.1006-754X.2025.04.181
doi: 10.3785/j.issn.1006-754X.2025.04.181
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