铆钉布置对搭接接头强度的影响及优化设计

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摘要针对铆钉布置对铆接搭接接头强度的影响问题，首先通过有限元方法研究了铆接搭接接头的失效模式及失效机理，其次以峰值荷载为指标研究了铆钉数量、铆钉行数、铆钉布置、铆钉行距对搭接强度的影响，以线荷载集度为指标，研究了铆钉间距与铆钉边距对搭接强度的影响，并建立力学模型研究多排铆钉的受力情况，最后基于响应面法对铆钉布置进行优化。结果表明：当采用多行铆钉布置时，外侧铆钉数较多的一行由于应力集中程度高会首先发生断裂，铆钉布置应采用中间多两边少的布置方式;当铆钉总强度大于板材剩余强度时，铆钉数量和铆钉行数对搭接强度的影响有限，其主要影响搭接构件的破坏形式。响应面优化结果表明：当边距=3.4d、铆距=5.3d、行距=3.4d时搭接强度最高。研究成果对飞机铆接结构的强度提高具有重要意义。

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	韩昊兵1
	徐文涛1
	卿华2
	任柯融2
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关键词 ：铆钉布置, 破坏机理, 应力集中, 线荷载集度, 力学模型, 响应面分析

Abstract：To address the issue of the effect of rivet arrangement on the strength of riveted lap joints, the failure mode and failure mechanism of riveted lap joints were first studied by LS-DYNA. Secondly, the effects of the number of rivets, rivet rows, rivet arrangement and rivet row spacing on the lap joint strength were studied using the peak load as the index, and the effects of rivet spacing and rivet edge distance on the lap joint strength were studied using the linear load concentration. A mechanical model is also developed to study the stresses on multiple rows of rivets. Finally, the rivet arrangement is optimized based on the Response Surface Methodology. The results show that when multiple rivet lines are used, the outer rivet line with more rivets will break first due to high stress concentration, and the rivet arrangement should be arranged in a way that there are more rivets in the middle and fewer rivets on both sides. When the total rivet strength is greater than the residual strength of the plate, the number of rivets and rivet rows have limited effect on the lap joint strength, which mainly affects the damage form of the lap joint member. The response surface optimization results show that the lap joint strength is highest when the edge spacing = 3.4d, rivet spacing = 5.3d, and row spacing = 3.4d. The research results are of great significance to the strength improvement of the riveted structures of aircraft.

Key words： rivet arrangement failure mechanism stress concentration Line load concentration mechanical model response surface analysis

收稿日期: 2022-07-19 出版日期: 2023-09-15

引用本文:

韩昊兵1，徐文涛1，卿华2，任柯融2,3. 铆钉布置对搭接接头强度的影响及优化设计[J]. 振动与冲击, 2023, 42(17): 253-264.
HAN Haobing1, XU Wentao1, QING Hua2, REN Kerong2,3. Effects of rivet arrangement on strength of lap joint and its optimization design. JOURNAL OF VIBRATION AND SHOCK, 2023, 42(17): 253-264.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2023/V42/I17/253

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