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Ultrasonic Guided Wave Imaging Techniques in Structural Health Monitoring

[+] Author Affiliations
Fei Yan

Pennsylvania State University, University Park, PA

Joseph L. Rose

Pennsylvania State University, University Park; FBS, Inc., State College, PA

Roger L. Royer, Jr.

FBS, Inc., State College, PA

Paper No. SMASIS2008-592, pp. 247-253; 7 pages
doi:10.1115/SMASIS2008-592
From:
  • ASME 2008 Conference on Smart Materials, Adaptive Structures and Intelligent Systems
  • Smart Materials, Adaptive Structures and Intelligent Systems, Volume 2
  • Ellicott City, Maryland, USA, October 28–30, 2008
  • Conference Sponsors: Aerospace Division
  • ISBN: 978-0-7918-4332-1 | eISBN: 978-0-7918-3839-6
  • Copyright © 2008 by ASME

abstract

Ultrasonic guided waves, due to theirs capability of interrogating a large structure from a single sensor position, has been proven as a promising tool for structural health monitoring (SHM). In this paper, we present two imaging approaches of utilizing guided wave leave-in-place sensors for early detection of defects in plate-like structures as well as for monitoring the defect growth. The first approach is based on a guided wave tomographic technique, in which the region surrounded by a sparse sensor array is monitored. The second one is a phased array approach, in which sensors are attached to a structure in a compact format to form an array. The region subjected to inspection and monitoring is the region outside the array. Both techniques have shown excellent capability of determining damage size, location, and severity.

Copyright © 2008 by ASME

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