Title: Effect of stress ratio on fatigue crack growth

Authors: A.A. Bahashwan

Addresses: Department of Mechanical Engineering, Faculty of Engineering, University of Aden, Republic of Yemen

Abstract: Crack growth data of 6061-T6 aluminium alloys were analysed to study the effect of stress ratio. The life of the specimen decreased as the maximum stress intensity increased. The data covered R values for 0.0, 0.1, 0.2 and 0.3 and a good correlation was obtained for U = ((13.5 + 6.0)/l000)ΔK + 1.4R. A crack growth rate equation was also developed.

Keywords: fatigue crack growth; material failure; material testing; stress ratio; aluminium alloys; crack growth rate.

DOI: 10.1504/IJMPT.1997.036376

International Journal of Materials and Product Technology, 1997 Vol.12 No.4/5/6, pp.389 - 395

Published online: 02 Nov 2010 *

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