Health monitoring of adhesively bonded joints using multiple ultrasonic guided wave modes for improved sensitivity

Baiyang Ren, Cliff J. Lissenden

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

Abstract

Helicopter structures utilize materials with high specific strength and stiffness such as aluminum and composites. Adhesive bonding is a superior joining technique that saves weight, improves aerodynamics and reduces stress concentrations. However, adhesive joints are subject to invisible defects and need in-situ methods to monitor the structural integrity. Ultrasonic guided waves are famous for their large coverage area, capability of reaching inaccessible regions and have good sensitivity to many types of defects. Phased array transducers for structural health monitoring (SHM) are designed to make full use of the multimodal characteristic of guided waves. The unique damage indicators of mode amplitude ratio and wave package composition, are proposed after conducting theoretical and finite element analyses. Experiments are performed to verify the detection and characterization capability using proposed damage indicators. Good sensitivity and potential for defect sizing have been demonstrated for adhesive bonds for both aluminum and carbon fiber composite structures.

Original languageEnglish (US)
Title of host publicationAmerican Helicopter Society International - Airworthiness, CBM and HUMS Specialists' Meeting 2015
PublisherAmerican Helicopter Society International
Pages104-111
Number of pages8
ISBN (Electronic)9781510804128
StatePublished - Jan 1 2015
EventAirworthiness, CBM and HUMS Specialists' Meeting 2015 - Huntsville, United States
Duration: Feb 9 2015Feb 11 2015

Publication series

NameAmerican Helicopter Society International - Airworthiness, CBM and HUMS Specialists' Meeting 2015

Other

OtherAirworthiness, CBM and HUMS Specialists' Meeting 2015
CountryUnited States
CityHuntsville
Period2/9/152/11/15

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering

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  • Cite this

    Ren, B., & Lissenden, C. J. (2015). Health monitoring of adhesively bonded joints using multiple ultrasonic guided wave modes for improved sensitivity. In American Helicopter Society International - Airworthiness, CBM and HUMS Specialists' Meeting 2015 (pp. 104-111). (American Helicopter Society International - Airworthiness, CBM and HUMS Specialists' Meeting 2015). American Helicopter Society International.