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机械紧固件排列对混合接头静强度和疲劳寿命的影响。

Influence of the Arrangement of Mechanical Fasteners on the Static Strength and Fatigue Life of Hybrid Joints.

作者信息

Rośkowicz Marek, Godzimirski Jan, Komorek Andrzej, Gąsior Jarosław, Jasztal Michał

机构信息

Department of Mechatronics, Armament and Aerospace, Military University of Technology, 00-908 Warsaw, Poland.

Department of Aviation, Polish Air Force University, 08-530 Dęblin, Poland.

出版信息

Materials (Basel). 2020 Nov 24;13(23):5308. doi: 10.3390/ma13235308.

DOI:10.3390/ma13235308
PMID:33255207
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7727667/
Abstract

This paper presents the results of experimental research and numerical calculations regarding the static strength and fatigue life of hybrid joints. In the experiments, specimens built as single-lap adhesive-mechanical joints (hybrid joints) were tested. In a two-stage process of the failure of the hybrid joints, the adhesive joint was damaged first. Therefore, it was assumed that the assembly of fasteners closer to the edge of the overlap (beyond the ranges recommended for mechanical joints) limits the negative impact of the peeling phenomenon on the strength and performance properties of hybrid joints. The specimens used in the experiments were prepared from composite elements (i.e., carbon fiber-reinforced polymer (CFRP)), as well as from the aluminum alloy 2024T4. Because the detection of fatigue damage in composite materials is a complex problem, computed tomography was used to evaluate the degradation of the composite material. Experimental and numerical comparative analyses of the static strength and fatigue life of hybrid joints with adhesive and mechanical joints confirmed the assumptions made.

摘要

本文介绍了关于混合接头静强度和疲劳寿命的实验研究与数值计算结果。在实验中，对构建为单搭接胶粘-机械接头（混合接头）的试样进行了测试。在混合接头失效的两阶段过程中，胶粘接头首先受损。因此，假设靠近搭接边缘（超出机械接头推荐范围）的紧固件组件限制了剥离现象对混合接头强度和性能特性的负面影响。实验中使用的试样由复合材料元件（即碳纤维增强聚合物（CFRP））以及铝合金2024T4制备而成。由于检测复合材料中的疲劳损伤是一个复杂问题，因此使用计算机断层扫描来评估复合材料的降解情况。对胶粘接头和机械接头的混合接头静强度和疲劳寿命进行的实验和数值对比分析证实了所做的假设。

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