Baseline-free estimation of the residual fatigue life using a modulated nonlinear ultrasound method

Research output: Contribution to conferencePaper

Abstract

This work develops a modulated nonlinear elastic wave spectroscopy (NEWS) method for the evaluation of a metallic components residual fatigue life. An aluminium specimen (AA6082-T6) was tested at predetermined points throughout its fatigue life using a dual-frequency ultrasound method. A modulated nonlinear parameter was derived, which described the relationship between the generation of modulated (sideband) responses of a dual frequency signal and the linear response. The sideband generation from the dual frequency was shown to increase as the residual fatigue life decreased, and as a standalone measurement method it can be used to show an increase in a materials damage. Although analytical evaluation of the method was required to develop a baseline-free method, work done by Meo and Amerini combined the Paris law and the Nazarov-Sutin crack equation developing the theoretical model. The results showed good correlation between the derived theoretical model and the modulated nonlinear parameter, allowing for material residual fatigue life estimation.
Original languageEnglish
Publication statusPublished - 2013
EventThe 9th International Workshop on Structural Health Monitoring -
Duration: 9 Sep 2018 → …

Conference

ConferenceThe 9th International Workshop on Structural Health Monitoring
Period9/09/18 → …

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Ultrasonics
Fatigue of materials
Elastic waves
Spectroscopy
Cracks
Aluminum

Cite this

Malfense Fierro, G-P., & Meo, M. (2013). Baseline-free estimation of the residual fatigue life using a modulated nonlinear ultrasound method. Paper presented at The 9th International Workshop on Structural Health Monitoring , .

Baseline-free estimation of the residual fatigue life using a modulated nonlinear ultrasound method. / Malfense Fierro, Gian-Piero; Meo, Michele.

2013. Paper presented at The 9th International Workshop on Structural Health Monitoring , .

Research output: Contribution to conferencePaper

Malfense Fierro, G-P & Meo, M 2013, 'Baseline-free estimation of the residual fatigue life using a modulated nonlinear ultrasound method' Paper presented at The 9th International Workshop on Structural Health Monitoring , 9/09/18, .
Malfense Fierro G-P, Meo M. Baseline-free estimation of the residual fatigue life using a modulated nonlinear ultrasound method. 2013. Paper presented at The 9th International Workshop on Structural Health Monitoring , .
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