Open AccessResonance track‐and‐dwell testing for crack length measurement on 304L stainless steel
Author(s) -
Christophe Gautrelet,
Leila Khalij,
Marcela Machado
Publication year - 2020
Publication title -
mechanics and industry
Language(s) - English
Resource type - Journals
eISSN - 2257-7777
pISSN - 2257-7750
DOI - 10.1051/meca/2020089
Subject(s) - shaker , materials science , resonance (particle physics) , vibration , track (disk drive) , bending , dwell time , stiffness , structural engineering , acoustics , composite material , physics , engineering , mechanical engineering , medicine , clinical psychology , particle physics
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.