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首页> 外文期刊>Composite Structures >Shear failure behavior of CFRP/Al and steel/Al electromagnetic self-piercing riveted joints subject to high-speed loading
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Shear failure behavior of CFRP/Al and steel/Al electromagnetic self-piercing riveted joints subject to high-speed loading

机译：CFRP / Al和钢/ Al电磁自穿孔铆钉接头在高速载荷下的剪切破坏行为

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摘要

In this paper, the electromagnetic self-piercing riveted (E-SPR) technique was employed to rivet carbon fiber reinforced plastics and aluminum (C-A), as well as high strength steel and aluminum (S-A). The shear failure behaviors of the riveted joints under different loading speeds were investigated and compared. The shear experiments and full-field strain measurements were carried out. The test results showed that the shear strength of S-A joints was higher than that of C-A joints. Besides, for both joints, the maximum shear load at higher tensile speeds was larger than that at lower tensile speeds. The energy absorption of both C-A and S-A joints decreased with the increase of the loading speed. Full-field strain analysis showed that loading rate and material combination had a significant influence on joint failure behavior. For C-A joint, CFRP sheet around the rivet damaged and Al sheet bent at all tensile speeds. For S-A joint, the steel sheet bent to varying degrees at different tensile speeds. Local deformation and large area bending occurred on the Al sheet at quasi-static and high speed tensile processes, respectively. Finally, based on above results and analysis, the shear failure mechanism was discussed.
机译：本文采用电磁自穿孔铆接（E-SPR）技术铆接碳纤维增强塑料和铝（C-A）以及高强度钢和铝（S-A）。研究并比较了不同加载速度下铆接接头的剪切破坏行为。进行了剪切实验和全场应变测量。试验结果表明，S-A型接头的剪切强度高于C-A型接头。此外，对于两个接头，在较高的拉伸速度下的最大剪切载荷大于在较低的拉伸速度下的最大剪切载荷。 C-A和S-A接头的能量吸收随着加载速度的增加而降低。全场应变分析表明，加载速率和材料组合对接头的破坏行为有显着影响。对于C-A接头，铆钉周围的CFRP板受损，Al板在所有拉伸速度下都弯曲。对于S-A接头，钢板在不同的拉伸速度下会弯曲不同的程度。铝板在准静态和高速拉伸过程中分别发生局部变形和大面积弯曲。最后，基于以上结果和分析，讨论了剪切破坏机理。

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