Detecting and Monitoring Cracks in Aerospace Materials Using Post-Processing of TSA and AE Data

Middleton, Ceri A ORCID: 0000-0001-9488-9717, McCrory, John P, Greene, Richard J ORCID: 0000-0002-5373-0598, Holford, Karen and Patterson, Eann A ORCID: 0000-0003-4397-2160 (2019) Detecting and Monitoring Cracks in Aerospace Materials Using Post-Processing of TSA and AE Data. METALS, 9 (7). p. 748.

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Official URL: http://dx.doi.org/10.3390/met9070748

Abstract

<jats:p>Thermoelastic stress analysis (TSA) is a non-contact technique for measuring the distribution of stress in the surface of a component subject to cyclic loading by using a sensitive infrared camera. The stress concentrations indicative of a crack can be located and tracked using an optical flow method, allowing the position of the crack-tip to be identified at a given time. Acoustic emission (AE) has been used to validate the TSA algorithm. AE events from cracking, located using the Delta-T Mapping method, were detected several seconds before the TSA algorithm first detected cracking; however, TSA provided significantly more accurate location information.</jats:p>

Item Type:	Article
Uncontrolled Keywords:	thermoelastic stress analysis, acoustic emission, optical flow, Delta-T Mapping, crack tracking
Depositing User:	Symplectic Admin
Date Deposited:	04 Jul 2019 07:20
Last Modified:	19 Jan 2023 00:38
DOI:	10.3390/met9070748
Open Access URL:	https://www.mdpi.com/2075-4701/9/7/748
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3048570