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

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 proced...

Full description

Saved in:
Bibliographic Details
Published in:International journal of fatigue 2007-03, Vol.29 (3), p.575-586
Main Authors: de Matos, P.F.P., McEvily, A.J., Moreira, P.M.G.P., de Castro, P.M.S.T.
Format: Article
Language:English
Subjects:
Applied sciences
Cold working
Exact sciences and technology
Fatigue
Fatigue striation spacing
Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology
Metals. Metallurgy
Scanning electron microscopy
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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.
ISSN:0142-1123
1879-3452
DOI:10.1016/j.ijfatigue.2006.04.004