Please use this identifier to cite or link to this item: http://hdl.handle.net/10316/4326
Title: Effect of stress ratio and specimen thickness on fatigue crack growth of CK45 steel
Authors: Costa, J. D. M. 
Ferreira, J. A. M. 
Issue Date: 1998
Citation: Theoretical and Applied Fracture Mechanics. 30:1 (1998) 65-73
Abstract: Presented are the effect of stress ratio and thickness on the fatigue crack growth rate of CK45 steel according to DIN 17200. Test results are obtained for constant amplitude load in tension with three stress ratios of R=0, 0.2 and 0.4 and three specimen thicknesses of B=6, 12 and 24 mm. Microgauge crack opening values were used to calculate [Delta]Keff values from which the da/dN - [Delta]Keff curves are obtained. Crack closure can be applied to explain the influence of mean stress and specimen thickness on the fatigue crack growth rate in the second regime of the two-parameter crack growth rate relation. An empirical model is chosen for calculating the normalized load ratio parameter U as a function of R, B and [Delta]K and, for correlating the test data.
URI: http://hdl.handle.net/10316/4326
Rights: openAccess
Appears in Collections:FCTUC Eng.Mecânica - Artigos em Revistas Internacionais

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