Dirlik and Tovo-Benasciutti Spectral Methods in Vibration Fatigue: A Review with a Historical Perspective

The frequency domain techniques (also known as spectral methods) prove significantly more efficient than the time domain fatigue life calculations, especially when they are used in conjunction with finite element analysis. Frequency domain methods are now well established, and suitable commercial software is commonly available. Among the existing techniques, the methods by Dirlik and by Tovo-Benasciutti (TB) have become the most used. This study presents the historical background and the motivation behind the development of these two spectral methods, by also emphasizing their application and possible limitations. It further presents a brief review of the other spectral methods available for cycle counting directly from the power spectral density of the random loading. Finally, some ideas for future work are suggested.

Automated summary

Frequency domain techniques are proven to be more efficient than time domain fatigue life calculations, especially when used in conjunction with finite element analysis. Dirlik and Tovo-Benasciutti methods are among the most commonly used, with commercial software readily available. The study also discusses the historical background, motivation, application, limitations of these spectral methods, along with a brief review of other available methods for cycle counting. Ideas for future work are also suggested for further optimization.