Fracture Initiation and Propagation in Fatigue Contact Loading of AA6082 Aluminium Alloy

Angela Benedetti; Pier Gabriele Molari; Piero Morelli

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Fracture Initiation and Propagation in Fatigue Contact Loading of AA6082 Aluminium Alloy

机译：Fracture Initiation and Propagation in Fatigue Contact Loading of AA6082 Aluminium Alloy

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This paper presents the results of an experimental investigation on surface contact fatigue of AA6082 aluminium alloy. After testing, microscopy analysis of the specimen contact area shows plastic deformation at the centre and circumferential cracks at the very edge of the print. Major cracks develop at a certain depth under the border of the contact area and propagate beneath the surface, in the direction of both the centre of contact and the lateral free edge of the specimens. No cracks have been observed at the centre of contact, neither on the surface, nor inside the material. Tensile properties of the alloy have been measured and a non linear finite element analysis has been performed in order to calculate the field of deformation and stress in the contact zone. Finally, stress intensities are correlated with the crack initiation points and an interpretation of the propagation paths, in regard to stress distribution, is given.

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来源
《Key engineering materials》 |2006年第2期|1091-1094|共4页
作者
Angela Benedetti; Pier Gabriele Molari; Piero Morelli;
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作者单位

Department of Mechanical Engineering, v.le Risorgimento 2 -40136 Bologna, Italy;

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原文格式 PDF
正文语种英语
中图分类工程基础科学;
关键词
contact mechanics; fatigue of materials; crack initiation; crack propagation; aluminium alloys;

Fracture Initiation and Propagation in Fatigue Contact Loading of AA6082 Aluminium Alloy

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