Fatigue crack detection method using analysis of vibration signal

Arkadiusz Rychlik

Krzysztof Ligier


This paper discusses the method used to identify the process involving fatigue cracking of samples on the basis of selected vibration signal characteristics. Acceleration of vibrations has been chosen as a diagnostic signal in the analysis of sample cross section. Signal characteristics in form of change in vibration amplitudes and corresponding changes in FFT spectrum have been indicated for the acceleration. The tests were performed on a designed setup, where destruction process was caused by the force of inertia of the sample. Based on the conducted tests, it was found that the demonstrated sample structure change identification method may be applied to identify the technical condition of the structure in the aspect of loss of its continuity and its properties (e.g.: mechanical and fatigue cracks). The vibration analysis results have been verified by penetration and visual methods, using a scanning electron microscope.


fatigue cracking, diagnostic signal, force of inertia, microscopic examination

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Cited by

Rychlik, A., & Ligier, K. (2017). Fatigue crack detection method using analysis of vibration signal. Technical Sciences, 20(1), 63–74. https://doi.org/10.31648/ts.2909

Arkadiusz Rychlik 

Krzysztof Ligier