Performance investigation of two AE source location techniques on a Planar Multilayer Structure

Hassan, Md. Mehedi and Khan, Md. Tawhidul Islam and Hasemura, Yuji and Islam, Md. Mainul (2020) Performance investigation of two AE source location techniques on a Planar Multilayer Structure. International Journal of Acoustics and Vibration, 25 (2). pp. 226-235. ISSN 1027-5851


Abstract

The comparisons of an AE source location performance of two widely used methods, time of arrival (TOA) and
difference of arrival time (DOAT) have been analyzed in a complex planar multilayered surface. The complex
surface has been prepared by covering a steel plate (SM400A) with a multilayered rubber material (Natural Rubber). The purpose of using this structure has been defined to get the comparable AE source location performance in a complicated signal propagation pathway. Both source location techniques have been conducted in a simulated AE wave propagating plane (300 mm � 200 mm in size) under Hsu-Nielsen method. Investigations reveal that the TOA technique gives several erroneous results along with good results. However, the DOAT method has produced all excellent results, even when using a complex surface. It was found since the TOA method is sensitive
to constant velocity continuity, the present complex pathway leads to the velocity discontinuity, and thus, several incorrect results have been found. On the other hand, the DOAT method is dependent on the arrival time difference only, and therefore, it shows a higher performance in the source location, even in the presence of a complex structure.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Faculty/School / Institute/Centre: Current - Faculty of Health, Engineering and Sciences - School of Mechanical and Electrical Engineering (1 Jul 2013 -)
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Future Materials (1 Jan 2017 -)
Date Deposited: 27 Jul 2020 00:15
Last Modified: 31 Jul 2020 02:06
Uncontrolled Keywords: AE; Source location; TOA,;DOAT; NDT
Fields of Research (2008): 09 Engineering > 0912 Materials Engineering > 091207 Metals and Alloy Materials
09 Engineering > 0913 Mechanical Engineering > 091301 Acoustics and Noise Control (excl. Architectural Acoustics)
Socio-Economic Objectives (2008): B Economic Development > 86 Manufacturing > 8612 Fabricated Metal Products > 861202 Machined Metal Products
Funding Details:
Identification Number or DOI: doi:10.20855/ijav.2020.25.21635
URI: http://eprints.usq.edu.au/id/eprint/39035

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