Abstract
For the sake of improving the static mechanical properties and decreasing the exterior protrusion height of the clinched joint, a mechanical rivet-reinforcing process with different reinforcing loads was carried out to join AA5052 sheets in this study. Tubular rivets with 1 mm wall thickness were used to conduct the rivet-reinforcing experiment. The static strength, failure mode, neck thickness, interlock value and energy absorption of the rivet-reinforced joints realized with different reinforcing loads were comprehensively analyzed by experimental method. With the gradual increase of the reinforcing load, the interlock value and neck thickness were enlarged, while the height of exterior protrusion was decreased. When the reinforcing load was 45 kN, the height of exterior protrusion was decreased from 1.17 to 0.52 mm. The energy absorption and average static strength of dissimilar rivet-reinforced joints were significantly higher than that of the conventional clinched joints. The average strength was increased from 1835.23 to 4032.87 N in the single-lap-shear test, and from 1395.02 to 1658.99 N in the cross-lap-tensile test. The energy absorption of joint was increased from 1.34 to 6.77 J in the single-lap-shear test, and from 4.26 to 9.18 J in the cross-lap-tensile test. It was proved that rivet-reinforcing process with tubular rivet can effectively increase the mechanical properties of the conventional clinched joints.
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This research work is supported by the National Natural Science Foundation of China (Grant No. 51805416), Young Elite Scientists Sponsorship Program by CAST, Natural Science Foundation of Hunan Province (Grant No. 2020JJ5716), the Project of State Key Laboratory of High Performance Complex Manufacturing, Central South University (Grant No. ZZYJKT2019-01), Huxiang High-Level Talent Gathering Project of HUNAN Province (Grant No. 2019RS1002), and Hunan Provincial Natural Science Foundation for Excellent Young Scholars.
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Chao Chen and Xiaoqiang Ren conceived and designed the experiments; Chao Chen and Xiaoqiang Ren performed the experiments; Yawen Ouyang, Denglin Qin, and Jinliang Wu analyzed the data; Chao Chen, Jinliang Wu and Denglin Qin contributed reagents/materials/analysis tools; Chao Chen and Xiaoqiang Ren wrote the paper.
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Ren, X., Chen, C., Qin, D. et al. Mechanical properties of tubular rivet-reinforced joints realized with different reinforcing loads. Int J Adv Manuf Technol 117, 877–888 (2021). https://doi.org/10.1007/s00170-021-07734-8
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DOI: https://doi.org/10.1007/s00170-021-07734-8