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The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of Open Access research papers by Strathclyde researchers, including by researchers from the Physical Activity for Health Group based within the School of Psychological Sciences & Health. Research here seeks to better understand how and why physical activity improves health, gain a better understanding of the amount, intensity, and type of physical activity needed for health benefits, and evaluate the effect of interventions to promote physical activity.

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A new look at the effect of bandwidth and non-normality on fatigue damage

Yu, L. and Das, P.K. and Barltrop, N. (2004) A new look at the effect of bandwidth and non-normality on fatigue damage. Fatigue and Fracture of Engineering Materials and Structures, 27 (1). pp. 51-58. ISSN 8756-758X

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Abstract

A new attempt is made in this paper to quantify the effect of bandwidth and non-normality in fatigue damage analysis. For the lack of actual stress history, a series of non-Gaussian and homogeneous random processes are generated with fast Fourier transform (FFT) acceleration. A factor is defined on the basis of rain-flow counting and Palmgren-Miner rule to correct the narrow band and normality assumption. It is revealed that the fatigue damage evaluated through the traditional method may be either conservative or rather unconservative. The upper and lower bounds of the correction factor are studied with respect to kurtosis and skewness of the generated random process and the slope of S-N curve.