Quantitative Identification and Prediction of 5182 Aluminum Alloy Clinched Joint Fatigue Life

IF 3.2 2区材料科学 Q2 ENGINEERING, MECHANICAL

Fatigue & Fracture of Engineering Materials & Structures Pub Date : 2025-05-01 DOI:10.1111/ffe.14669

Shouyi Guo, Lei Lei, Chunyu Song, Chenyang Ao, Ming Yan, Ye Shi

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引用次数: 0

Abstract

Clinching has emerged as a key research area in lightweight automotive design. A single-lap clinched joint of 5182 aluminum alloy was selected as the subject of this study. A dynamic response test platform was developed to conduct fatigue–dynamic response tests on clinched joints. The rate of change in the natural frequency characterizes the stages of fatigue failure, and a life cycle prediction model for clinched joints was established. The results indicate significant changes in the 14th-order natural frequency under high and medium loads, whereas the ninth-order frequency changes significantly at low loads. The crack propagation rate was the highest at the medium load level, and the natural frequency change remained stable for the first 66% of its lifespan, with significant changes following crack initiation. The proposed prediction model quantitatively identifies the real-time service state of a clinched joint and predicts its fatigue life.

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5182铝合金夹紧接头疲劳寿命定量鉴定与预测

在汽车轻量化设计中，夹击已成为一个重要的研究领域。选取5182铝合金单搭接铰接件为研究对象。研制了动态响应试验平台，对铰接接头进行疲劳-动态响应试验。利用固有频率变化率表征了疲劳失效阶段，建立了铰接的寿命周期预测模型。结果表明，在高、中负荷下，14阶固有频率发生显著变化，而在低负荷下，9阶固有频率发生显著变化。裂纹扩展速率在中等荷载水平下最高，固有频率变化在其寿命的前66%保持稳定，在裂纹萌生后发生显著变化。提出的预测模型可以定量识别铰扣的实时使用状态并预测其疲劳寿命。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Fatigue & Fracture of Engineering Materials & Structures 工程技术-材料科学：综合

CiteScore

6.30

自引率

18.90%

发文量

256

审稿时长

4 months

期刊介绍： Fatigue & Fracture of Engineering Materials & Structures (FFEMS) encompasses the broad topic of structural integrity which is founded on the mechanics of fatigue and fracture, and is concerned with the reliability and effectiveness of various materials and structural components of any scale or geometry. The editors publish original contributions that will stimulate the intellectual innovation that generates elegant, effective and economic engineering designs. The journal is interdisciplinary and includes papers from scientists and engineers in the fields of materials science, mechanics, physics, chemistry, etc.