Propagation of guided Lamb waves in concrete repaired with composite plates

K. Luangvilai, L. J. Jacobs, J. Qu

Research output: Contribution to journalConference articlepeer-review

Abstract

This research examines the propagation of guided Lamb waves in bonded components, establishing the effectiveness of combining laser ultrasonic techniques with a time-frequency representation (TFR) to experimentally measure the dispersion curves of a layered medium. The specific layered medium examined is a fiber-reinforced polymer (FRP) plate bonded (with an adhesive layer) to concrete. A TFR is used to operate on experimentally measured, guided Lamb waves to resolve individual Lamb wave modes and to generate the system's dispersion curves. The objective of this research is to demonstrate that it is possible to develop the dispersion curves of FRP bonded components from a single, experimentally measured guided wave signal. The experimental results show that, by examining the characteristics of the system's dispersion curves, the stiffer the bond, the more deviation from the behavior of a free plate case, and the less modes that are present.

Original languageEnglish
Pages (from-to)85-90
Number of pages6
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume5057
DOIs
StatePublished - 2003
EventSmart Structures and Materials 2003: Smart Systems and Nondestructive Evaluation for Civil Infrastructures - San Diego, CA, United States
Duration: 3 Mar 20036 Mar 2003

Keywords

  • Laser ultrasonics
  • Repaired concrete
  • Time-frequency representation

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