Mechanics & Industry
Volume 21, Number 6, 2020
|Number of page(s)||8|
|Published online||10 December 2020|
Resonance track‐and‐dwell testing for crack length measurement on 304L stainless steel
Normandie Université, Laboratoire de Mécanique de Normandie (LMN)/INSA ROUEN Normandie
2 Department of Mechanical Engineering, University of Brasilia, 70910-900, Brasilia, Brazil, France
* e-mail: email@example.com
Accepted: 16 November 2020
Experimental vibration-fatigue tests were conducted with sine resonance track‐and‐dwell (SRTD) tool by using an electrodynamic shaker on specimens made of 304L stainless steel. Due to cyclic fatigue resulting in stiffness loss, it can be found that the resonant frequency decreases when the specimen experiences substantial crack growth, especially for out-of-plane bending mode. The specimens were equipped by a crack propagation gauge (CPG) to monitor the crack growth. However, the presence of crack was detected late by these gauges. The deviation of the resonance frequency was therefore analysed from the time response measurements, and the results were confronted to the CPG measurements to conclude on the validity of the detection threshold provided by the literature.
Key words: Vibration-based bending tests / high cycle fatigue / resonant frequency deviation / fatigue crack growth / sine resonance track‐and‐dwell (SRTD)
© AFM, EDP Sciences 2020
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