Interface waves for SHM of adhesively bonded joints

H. Kannajosyula, P. Puthillath, Clifford Jesse Lissenden, III, Joseph Lawrence Rose

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

Adhesive bonds are being increasingly used in many load bearing and safety critical members or structures. The strength and reliability of adhesive bonds need to be monitored for structural integrity. Ultrasonic guided waves offer potentially infinite sets of inspection possibilities in terms of the frequency and phase velocity combinations. In this paper, a Lamb wave ultrasonic nondestructive testing (NDT) and structural health monitoring (SHM) technique for adhesively bonded metal plates is considered. SHM of such structures for detection of defects in the adhesive joint region can be more efficient if the wave structure of the Lamb wave mode is such that the energy is concentrated in the adhesive region instead of in the adherends. In this regard, the following method for determining such modes was attempted. The adhesively bonded joint was modeled in two different ways. The first model considers the bonded assembly i.e. the adherends (aluminum) and the adhesive (epoxy) to be three layers having finite thickness in perfect contact. In the second model the adhesive is considered to be a thin layer embedded between two half spaces of adherend material. The analytical dispersion curves from both the models were studied and it was observed that the regions where the dispersion curves from the models coincide have predominant displacement in the adhesive region. Parameters were extracted from analytical results with an aim to generate single mode interface waves in lap joints. Finite element simulations were performed to verify generation of single mode interface waves.

Original languageEnglish (US)
Title of host publicationStructural Health Monitoring 2009
Subtitle of host publicationFrom System Integration to Autonomous Systems - Proceedings of the 7th International Workshop on Structural Health Monitoring, IWSHM 2009
EditorsFu-Kuo Chang
PublisherDEStech Publications
Pages247-254
Number of pages8
Volume1
ISBN (Electronic)9781605950075
StatePublished - Jan 1 2009
Event7th International Workshop on Structural Health Monitoring: From System Integration to Autonomous Systems, IWSHM 2009 - Stanford, United States
Duration: Sep 9 2009Sep 11 2009

Other

Other7th International Workshop on Structural Health Monitoring: From System Integration to Autonomous Systems, IWSHM 2009
CountryUnited States
CityStanford
Period9/9/099/11/09

All Science Journal Classification (ASJC) codes

  • Health Information Management
  • Computer Science Applications

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  • Cite this

    Kannajosyula, H., Puthillath, P., Lissenden, III, C. J., & Rose, J. L. (2009). Interface waves for SHM of adhesively bonded joints. In F-K. Chang (Ed.), Structural Health Monitoring 2009: From System Integration to Autonomous Systems - Proceedings of the 7th International Workshop on Structural Health Monitoring, IWSHM 2009 (Vol. 1, pp. 247-254). DEStech Publications.