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Proceedings Article

Zero order mode selective excitation and highly resolved observations of lamb waves

[+] Author Affiliations
A. Abdelrahman, U. Amjad, D. Jha, K. S. Tarar, W. Grill

Univ. Leipzig (Germany)

Proc. SPIE 7984, Health Monitoring of Structural and Biological Systems 2011, 798413 (April 25, 2011); doi:10.1117/12.880602
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From Conference Volume 7984

  • Health Monitoring of Structural and Biological Systems 2011
  • Tribikram Kundu
  • San Diego, California, USA | March 06, 2011

abstract

In acoustics, Lamb waves are extremely useful for damage detection in sheet materials and tubular products. Among variety of techniques for the generation of lamb waves, lamb waves are detected using contact piezo electric transducers mounted on an aluminum sample. For this task, two pairs of transducers were introduced where each pair mounted on both surfaces of the sample. Mode selective excitation technique is used and two pre-amplifier circuits served as a part of the signal detection. For this application and more precisely with low frequency excitation signal, orthogonal zero order modes are observed in a high resolved fashion in aluminum sample of 1mm thickness. Principles of the developed method together with instrumental details are discussed.

© (2011) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Citation

A. Abdelrahman ; U. Amjad ; D. Jha ; K. S. Tarar and W. Grill
"Zero order mode selective excitation and highly resolved observations of lamb waves", Proc. SPIE 7984, Health Monitoring of Structural and Biological Systems 2011, 798413 (April 25, 2011); doi:10.1117/12.880602; http://dx.doi.org/10.1117/12.880602


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