A NOVEL FREQUENCY DOMAIN METHOD FOR PREDICTING FATIGUE CRACK GROWTH UNDER WIDE BAND RANDOM LOADING

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Abstract

This work deals with the evaluation of the fatigue crack growth rate of structural components subjected to uniaxial Gaussian stationary wide band random loading. In detail, a new frequency domain method that allows the user to estimate the expected crack growth rate directly from the PSD data is proposed. Using a stochastic mean function properly, introduced and described by simple closed form relationships implemented by systematic numerical simulations of a high number of wide band random processes, the proposed method permits to avoid the onerous time domain simulations and provides in general crack growth rate predictions in a good accordance with the so-called time domain method. Practical applications, carried out by considering various PSDs reported in the literature, have corroborated the accuracy of the proposed method. © 2006 Elsevier Ltd. All rights reserved.
Lingua originaleEnglish
pagine (da-a)1065-1079
RivistaInternational Journal of Fatigue
Volume29(6)
Stato di pubblicazionePublished - 2006

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All Science Journal Classification (ASJC) codes

  • Modelling and Simulation
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

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