锻压技术

异种金属材料自冲铆接头位置对疲劳强度的影响

英文标题：Influence of the self-piercing riveting position of dissimilar metal on fatigue strength

作者：黄志超黄秋雯李绍杰宋天赐

单位：华东交通大学

分类号：TG938

出版年,卷(期):页码：2017,42(9):150-156

摘要：

为了提高结构件的疲劳性能，基于大量实验研究了自冲铆接头位置布置对剪切结构件疲劳强度的影响。通过改变铆钉个数、搭接尺寸、最大循环载荷、铆钉到板长及板宽的边距等因素，对12种不同铆接位置的结构件进行了静力学实验，并在此基础上进行疲劳实验。实验结果表明：在搭接尺寸不变的情况下，铆钉到板长或板宽的距离过大或过小均会降低结构件的疲劳强度；结构件疲劳寿命随最大循环载荷的减小而增大；在一定范围内，结构件疲劳强度随搭接尺寸的增大而增大，随后呈降低趋势；二钉结构件的疲劳寿命显著高于单钉结构件的疲劳寿命，但并不随铆钉个数呈倍数的关系增长。

For the purpose of improving the fatigue strength of structural parts, the influences of the self-piercing riveting position on fatigue strength of the shear structure were studied by a large number of experiments. A static test on the joints was conducted under twelve different locations, and the fatigue test was performed based on the static test by changing the number of rivets, lap joint size plates, the maximum cyclic loading and margins from rivets to board length and plate width etc. The result shows that when the size of the overlap is fixed, too wide or too small margins can reduce fatigue strength, and fatigue life prolongs with the decrease of the maximum cyclic loading. However, within a certain range, fatigue life prolongs with the increase of the size of the overlap, and then it decreases. Therefore, the fatigue life of structural parts with two rivets is significantly higher than that of single rivet, and it does not grow exponentially with the increasing number of rivets.

基金项目：

国家自然科学基金资助项目(51565014)

黄志超（1971-），男，博士，教授 E-mail：hzcosu@163.com

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