Analysis of the effect of cold-working of rivet holes on the fatigue life of an aluminum alloy

被引：55

作者：

de Matos, P. F. P. ^{[1
]}

McEvily, A. J.

Moreira, P. M. G. P.

de Castro, P. M. S. T.

机构：

[1] Univ Porto, Fac Engn, Dept Mech Engn & Ind Management, P-4200465 Oporto, Portugal

[2] Univ Connecticut, Inst Mat Sci, Dept Mat Sci & Engn, Storrs, CT 06269 USA

来源：

INTERNATIONAL JOURNAL OF FATIGUE | 2007年 / 29卷 / 03期

关键词：

fatigue striation spacing; cold working; scanning electron microscopy;

D O I：

10.1016/j.ijfatigue.2006.04.004

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

An experimental and analytical program was carried out to assess the effect of cold-working by hole expansion on the fatigue life of Alclad 2024-T3 aluminium alloy. The magnitude of the residual stresses introduced into the specimens due to cold expansion was evaluated by an X-ray diffraction procedure. Specimens containing non-cold-worked and cold-worked holes were tested under cyclic loading at an R-ratio of 0.1. The rates of fatigue crack propagation were determined by measurement of striation spacing. A main outcome of the present work was the determination of the crack-opening stress intensity as a function of the range of the stress intensity factor. For the cold-worked specimens an inverse methodology was adopted to estimate the crack-opening stress intensity as influenced by the residual stress field. Finally, a crack growth model was used to provide a correlation with the experimental fatigue lifetimes. (c) 2006 Elsevier Ltd. All rights reserved.

引用

页码：575 / 586

页数：12

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