Non-velocity based analysis of passive ultrasonic signal for source location detection in composite plates: a pilot study

Hafizi, Z. M. and Epaarachchi, J. and Nizwan, C. K. E. and Lau, K. T. (2012) Non-velocity based analysis of passive ultrasonic signal for source location detection in composite plates: a pilot study. IOP Conference Series: Materials Science and Engineering, 36 (1). ISSN 1757-8981


Acoustic Emission (AE) evaluation is one of the fast growing non-destructive techniques, owing to its ability to reveal in advance of any impending failure of a building structure. This capability makes the so called passive ultrasonic technique a very good tool in structural health monitoring; especially for composite structures. In metallic structures, AE technique is currently well established and able to provide accurate and consistent result. However, in composites, the challenge for a reliable AE results is huge due to the orthotropic behaviour of the materials. The present study investigates the energy attenuation of AE signals in thin composite plate and utilized the attenuation pattern into non-velocity based source location detection. Standard Hsu-Nielsen source location testing was applied on a glass fibre epoxy resin laminate and a single channel AE system was used to acquire AE signals with the support from AEWin software for signal analysis. A linear source location algorithm utilizing AE signals energy attenuation patterns was developed and tested for the composite specimen. The results revealed that the source location algorithm provides reasonably accurate results of source location for glass fibre epoxy resin laminate.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: © 2012 IOP Publishing Ltd. Permanent restricted access to Published version due to publisher copyright policy.
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Mechanical and Mechatronic Engineering
Date Deposited: 10 May 2013 03:31
Last Modified: 14 Sep 2016 06:11
Uncontrolled Keywords: composites; epoxies; glasses; signal analysis; signal attenuation; structural health monitoring; ultrasonics
Fields of Research : 09 Engineering > 0913 Mechanical Engineering > 091399 Mechanical Engineering not elsewhere classified
09 Engineering > 0905 Civil Engineering > 090506 Structural Engineering
02 Physical Sciences > 0203 Classical Physics > 020301 Acoustics and Acoustical Devices; Waves
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
Identification Number or DOI: 10.1088/1757-899X/36/1/012008

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