Change in time-of-flight of longitudinal (axisymmetric) wave modes due to lamination in steel pipes

U. Amjad; Chi Hanh Nguyen; S. K. Yadav; E. Mahmoudabadi; T. Kundu

doi:10.1117/12.2009897

17 April 2013 Change in time-of-flight of longitudinal (axisymmetric) wave modes due to lamination in steel pipes

U. Amjad, Chi Hanh Nguyen, S. K. Yadav, E. Mahmoudabadi, T. Kundu

Proceedings Volume 8695, Health Monitoring of Structural and Biological Systems 2013; 869515 (2013) https://doi.org/10.1117/12.2009897
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2013, San Diego, California, United States

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.

Citation Download Citation

U. Amjad, Chi Hanh Nguyen, S. K. Yadav, E. Mahmoudabadi, and T. Kundu "Change in time-of-flight of longitudinal (axisymmetric) wave modes due to lamination in steel pipes", Proc. SPIE 8695, Health Monitoring of Structural and Biological Systems 2013, 869515 (17 April 2013); https://doi.org/10.1117/12.2009897

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