A novel frequency domain method for predicting fatigue crack growth under wide band random loading
✍ Scribed by B. Zuccarello; N.F. Adragna
- Publisher
- Elsevier Science
- Year
- 2007
- Tongue
- English
- Weight
- 430 KB
- Volume
- 29
- Category
- Article
- ISSN
- 0142-1123
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✦ Synopsis
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.