TY - GEN
T1 - Vibro-acoustic amplitude and frequency modulations during fatigue damage evolution
AU - Donskoy, Dimitri
AU - Golchinfar, Behnoush
AU - Ramezani, Majid
AU - Rutner, Marcus
AU - Hassiotis, Sophia
N1 - Publisher Copyright:
© 2019 Author(s).
PY - 2019/5/8
Y1 - 2019/5/8
N2 - Vibro-Acoustic Modulation method (VAM) utilizes effect of the nonlinear interaction between higher frequency ultrasonic wave (carrier signal) and much lower frequency structural vibration (modulating signal). This interaction is taken place at the nonlinear interfaces (cracks, bolted connections, delaminations, etc.) manifesting itself in the spectrum as side-band components around the carrier. There are numerous studies applying VAM for nondestructive testing and structural health monitoring. Most of them utilize resonance structural bending vibrations as the modulating signal and measure a ratio of sideband to carrier spectral components defined as Modulation Index (MI). The present VAM study utilizes in-plane non-resonance very low frequency (10 Hz) tensile oscillations for monitoring fatigue and stress-corrosion damage evolution in steel. Experiments consistently demonstrated significant increase in MI during 70% - 80% of the fatigue life. Additionally, newly developed algorithm separates Amplitude and Frequency Modulations during the damage evolution demonstrating FM dominance at initial micro-crack growth stages and transition to AM dominance during macro-crack formation.
AB - Vibro-Acoustic Modulation method (VAM) utilizes effect of the nonlinear interaction between higher frequency ultrasonic wave (carrier signal) and much lower frequency structural vibration (modulating signal). This interaction is taken place at the nonlinear interfaces (cracks, bolted connections, delaminations, etc.) manifesting itself in the spectrum as side-band components around the carrier. There are numerous studies applying VAM for nondestructive testing and structural health monitoring. Most of them utilize resonance structural bending vibrations as the modulating signal and measure a ratio of sideband to carrier spectral components defined as Modulation Index (MI). The present VAM study utilizes in-plane non-resonance very low frequency (10 Hz) tensile oscillations for monitoring fatigue and stress-corrosion damage evolution in steel. Experiments consistently demonstrated significant increase in MI during 70% - 80% of the fatigue life. Additionally, newly developed algorithm separates Amplitude and Frequency Modulations during the damage evolution demonstrating FM dominance at initial micro-crack growth stages and transition to AM dominance during macro-crack formation.
UR - http://www.scopus.com/inward/record.url?scp=85066068528&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85066068528&partnerID=8YFLogxK
U2 - 10.1063/1.5099754
DO - 10.1063/1.5099754
M3 - Conference contribution
AN - SCOPUS:85066068528
T3 - AIP Conference Proceedings
BT - 45th Annual Review of Progress in Quantitative Nondestructive Evaluation, Volume 38
A2 - Laflamme, Simon
A2 - Holland, Stephen
A2 - Bond, Leonard J.
T2 - 45th Annual Review of Progress in Quantitative Nondestructive Evaluation, QNDE 2018
Y2 - 15 July 2018 through 19 July 2018
ER -