Investigation of crack propagation characteristics in clinched joints under different failure modes

IF 5.7 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2025-02-27 DOI:10.1016/j.tws.2025.113129

Yan Lu , Yanghu Hu , Chao Chen

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引用次数: 0

Abstract

This study successfully simulated fatigue crack propagation paths and predicted the fatigue life of 6063-T6 aluminum alloy under different failure modes. A finite element model for fatigue crack propagation in 6063-T6 aluminum alloy clinched joints was developed using the ABAQUS-FRANC3D interaction method. Based on linear elastic fracture mechanics theory, the model employs the M-integral to calculate the stress intensity factor at the crack tip. The crack propagation direction is accurately predicted through analysis of the crack tip stress field and stress intensity factor variations. The results demonstrate distinct crack initiation mechanisms for different failure modes. In necking fracture mode, crack initiation occurs through the accumulation of fatigue slip bands, with crack propagation direction influenced by shear stress orientation. In lower sheet fracture mode, crack initiation is caused by oxide formation due to fretting wear between sheets, with crack propagation direction perpendicular to the shear stress orientation. The model demonstrates reliable accuracy in fatigue life prediction, offering valuable insights for structural safety assessment and remaining life evaluation in engineering applications.

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来源期刊

Thin-Walled Structures 工程技术-工程：土木

CiteScore

9.60

自引率

20.30%

发文量

801

审稿时长

66 days

期刊介绍： Thin-walled structures comprises an important and growing proportion of engineering construction with areas of application becoming increasingly diverse, ranging from aircraft, bridges, ships and oil rigs to storage vessels, industrial buildings and warehouses. Many factors, including cost and weight economy, new materials and processes and the growth of powerful methods of analysis have contributed to this growth, and led to the need for a journal which concentrates specifically on structures in which problems arise due to the thinness of the walls. This field includes cold– formed sections, plate and shell structures, reinforced plastics structures and aluminium structures, and is of importance in many branches of engineering. The primary criterion for consideration of papers in Thin–Walled Structures is that they must be concerned with thin–walled structures or the basic problems inherent in thin–walled structures. Provided this criterion is satisfied no restriction is placed on the type of construction, material or field of application. Papers on theory, experiment, design, etc., are published and it is expected that many papers will contain aspects of all three.