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Proceedings Paper

Change in time-of-flight of longitudinal (axisymmetric) wave modes due to lamination in steel pipes
Author(s): U. Amjad; Chi Hanh Nguyen; S. K. Yadav; E. Mahmoudabadi; T. Kundu
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Paper Abstract

Investigations with the aid of longitudinal guided waves in cylindrical structures have been regularly carried out for nondestructive evaluation (NDE) and structural health monitoring (SHM). While earlier works concentrated on the amplitude reduction of the propagating waves due to structural anomalies in this work the change in time-of-flight is investigated. Longitudinal (axisymmetric) modes are excited by a PZT (Lead Zirconate Titanate) transducer for detection of any fluctuation or change in the surface of a steel pipe. Propagating waves are analyzed after proper signal processing. To observe the small change in TOF due to lamination on the surface of a steel pipe, cross-correlation technique is used to attain a higher temporal resolution. The experimental technique is discussed and the obtained results are presented in this paper.

Paper Details

Date Published: 17 April 2013
PDF: 9 pages
Proc. SPIE 8695, Health Monitoring of Structural and Biological Systems 2013, 869515 (17 April 2013); doi: 10.1117/12.2009897
Show Author Affiliations
U. Amjad, The Univ. of Arizona (United States)
Chi Hanh Nguyen, The Univ. of Arizona (United States)
S. K. Yadav, The Univ. of Arizona (United States)
E. Mahmoudabadi, The Univ. of Arizona (United States)
T. Kundu, The Univ. of Arizona (United States)


Published in SPIE Proceedings Vol. 8695:
Health Monitoring of Structural and Biological Systems 2013
Tribikram Kundu, Editor(s)

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