A natural focusing low frequency guided wave experiment for the detection of defects beyond elbows

Joseph Lawrence Rose; Li Zhang; Michael J. Avioli; Peter J. Mudge

doi:10.1115/1.1989350

A natural focusing low frequency guided wave experiment for the detection of defects beyond elbows

Joseph Lawrence Rose, Li Zhang, Michael J. Avioli, Peter J. Mudge

Research output: Contribution to journal › Article › peer-review

32 Scopus citations

Abstract

Long range ultrasonic guided wave inspection is advancing rapidly and is quite commonplace today. Benefits of using longitudinal or torsional modes are being established in special circumstances of improved sensitivity, resolution, or penetration power. The possibility of inspection under insulation, coatings, or with water filled pipes or around elbows is possible. Detection of defects beyond a pipe elbow is difficult for axisymmetric wave impingement onto the elbow. For nonaxisymmetric input to the elbow region, however, via partial loading around the circumference, natural focusing occurs because of angular profile variation around the circumference of the pipe. Sample computations of possible angular profiles are illustrated. An experiment is also reported here to demonstrate this inspection process.

Original language	English (US)
Pages (from-to)	310-316
Number of pages	7
Journal	Journal of Pressure Vessel Technology, Transactions of the ASME
Volume	127
Issue number	3
DOIs	https://doi.org/10.1115/1.1989350
State	Published - Aug 1 2005

All Science Journal Classification (ASJC) codes

Safety, Risk, Reliability and Quality
Mechanics of Materials
Mechanical Engineering

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10.1115/1.1989350

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abstract = "Long range ultrasonic guided wave inspection is advancing rapidly and is quite commonplace today. Benefits of using longitudinal or torsional modes are being established in special circumstances of improved sensitivity, resolution, or penetration power. The possibility of inspection under insulation, coatings, or with water filled pipes or around elbows is possible. Detection of defects beyond a pipe elbow is difficult for axisymmetric wave impingement onto the elbow. For nonaxisymmetric input to the elbow region, however, via partial loading around the circumference, natural focusing occurs because of angular profile variation around the circumference of the pipe. Sample computations of possible angular profiles are illustrated. An experiment is also reported here to demonstrate this inspection process.",

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A natural focusing low frequency guided wave experiment for the detection of defects beyond elbows

Abstract

All Science Journal Classification (ASJC) codes

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