锻压技术

铆接工况对复合材料铆接件剪切性能的影响

英文标题：Influence of riveting conditions on shear properties of composite material riveted parts

分类号：U270.6； TH140.7

出版年,卷(期):页码：2024,49(8):125-131

摘要：

在实际生产过程中，受大部件组装或现场施工情况的影响，轨道车辆复合材料铆接件可能出现不同的工况。为研究铆接间隙和铆接方式等因素对复合材料铆接件剪切性能的影响，根据实际情况设计了11种铆接工况，并利用拉力试验机开展剪切试验，分析试件的失效形式、载荷-位移曲线及剪切性能。试验结果表明：试件的剪切失效形式有铆钉本身失效和拉脱失效两种，铆钉本身失效为主要的失效形式；各工况的载荷-位移曲线趋势基本一致，不同失效形式在曲线上未表现出明显差异，剪切过程可以分为4个阶段；相同铆接方式条件下，试件的剪切性能随着铆接间隙的增大逐渐变差；相同铆接间隙条件下，湿安装试件的剪切性能总体优于干安装试件。

In the actual production process, the composite material riveted parts of rail vehicles may appear different working conditions due to the influence of large component assembly or on-site construction conditions. Therefore, in order to study the influence of factors such as riveting gaps and riveting methods on the shear properties of composite material riveted parts, eleven riveting conditions were designed according to the actual situation, and the shear tests were carried out by tensile testing machine to analyze the failure forms, load-displacement curves and shear properties of specimens. The test results show that there are two forms of shear failure for the specimens, namely rivet failure itself and pull-off failure, and the rivet failure itself is the main failure form. The trend of load-displacement curves for each working condition is basically consistent, and different failure forms do not show obvious differences on the curves, the shear process can be divided into four stages. Under the same condition of riveting method, the shear properties of the specimens gradually deteriorate with the increasing of riveting gap, while under the same condition of riveting gap, the shear properties of wet installation specimens are generally better than that of dry installation specimens.

基金项目：

中车重大项目（2022CKA323）

作者简介：林森(1990-)，男，博士，高级工程师 E-mail：linsen_phd@163.com 通信作者：倪文波(1969-)，男，博士，教授 E-mail：nwb@home.swjtu.edu.cn

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