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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.

Item type: Article
ID code: 4950
Keywords: fast Fourier transform, fatigue damage, random process generation, Naval architecture. Shipbuilding. Marine engineering, Mechanics of Materials, Materials Science(all), Mechanical Engineering
Subjects: Naval Science > Naval architecture. Shipbuilding. Marine engineering
Department: Faculty of Engineering > Naval Architecture and Marine Engineering
Unknown Department
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    Depositing user: Strathprints Administrator
    Date Deposited: 06 Dec 2007
    Last modified: 04 Sep 2014 16:07
    URI: http://strathprints.strath.ac.uk/id/eprint/4950

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