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
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
收藏
页码:575 / 586
页数:12
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