Characteristics of Spiral Lamb Wave Triggered by CL-MPT and Its Application to the Detection of Limited Circumferential Extent Defects and Axial Extent Evaluation within Pipes

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

Detail(s)

Original languageEnglish
Article number9464958
Journal / PublicationIEEE Transactions on Instrumentation and Measurement
Volume70
Online published25 Jun 2021
Publication statusPublished - 2021

Abstract

The traditionally used cylindroid guided wave modes are not suitable for the detection of limited circumferential extent defects and the evaluation of the axial extent of defects within a pipe. The reason is that it is difficult to generate reflections from limited circumferential extent defects using traditional modes. It is also difficult to evaluate the axial extent of defects by using them. This article proposes using the spirally propagating circumferential Lamb (CL) wave triggered by a specially designed circumferential Lamb wave-based magnetostrictive patch transducer (CL-MPT). It can rapidly detect the position of a defect regardless of its limited circumferential extent, rather than the axial scanning of pipes using traditional circumferential modes. The axial extent of a defect can also be evaluated by summating the number of the signals that contain defect reflections. It was experimentally proven that the CL wave could be applied to supplement the traditional modes.

Research Area(s)

  • Axial extent, circumferential extent, circumferential Lamb (CL) wave, magnetostrictive patch transducer (MPT), spirally propagating

Citation Format(s)

Characteristics of Spiral Lamb Wave Triggered by CL-MPT and Its Application to the Detection of Limited Circumferential Extent Defects and Axial Extent Evaluation within Pipes. / Fang, Zhou; Tse, Peter W.

In: IEEE Transactions on Instrumentation and Measurement, Vol. 70, 9464958, 2021.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review