A reference-free guided wave based damage localization approach for highly dispersive structures

Guoyi Li, Abhishek Rajadas, Aditi Chattopadhyay, Daniel W. Huff

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

3 Scopus citations

Abstract

The detection and localization of in situ damage in complex sandwich material such as X-COR sandwich composites using guided wave based structural health monitoring techniques is difficult due to the highly dispersive media and complex geometry, which complicates the interpretation of the reflected wave modes induced by damage. In this paper, a novel reference-free damage localization framework is developed, whereby converted wave modes are studied using their time-space representations constructed from sensor arrays signals. The source of each wave mode is subsequently localized using linear regression techniques. The X-COR sandwich structure utilized in this research was manufactured to include seeded facesheet delaminations. Macro-fiber composite sensors were bonded to the panel surface and used to validate the developed framework. Excellent agreement is shown between the predicted and actual locations of delamination and actuator. The results indicate that mode conversion is an effective damage indicator, and the proposed time-space based damage localization framework is a promising structural health monitoring tool for highly dispersive media.

Original languageEnglish (US)
Title of host publicationStructural Health Monitoring 2017
Subtitle of host publicationReal-Time Material State Awareness and Data-Driven Safety Assurance - Proceedings of the 11th International Workshop on Structural Health Monitoring, IWSHM 2017
PublisherDEStech Publications
Pages1607-1614
Number of pages8
Volume1
ISBN (Electronic)9781605953304
StatePublished - 2017
Event11th International Workshop on Structural Health Monitoring 2017: Real-Time Material State Awareness and Data-Driven Safety Assurance, IWSHM 2017 - Stanford, United States
Duration: Sep 12 2017Sep 14 2017

Other

Other11th International Workshop on Structural Health Monitoring 2017: Real-Time Material State Awareness and Data-Driven Safety Assurance, IWSHM 2017
CountryUnited States
CityStanford
Period9/12/179/14/17

ASJC Scopus subject areas

  • Health Information Management
  • Computer Science Applications

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  • Cite this

    Li, G., Rajadas, A., Chattopadhyay, A., & Huff, D. W. (2017). A reference-free guided wave based damage localization approach for highly dispersive structures. In Structural Health Monitoring 2017: Real-Time Material State Awareness and Data-Driven Safety Assurance - Proceedings of the 11th International Workshop on Structural Health Monitoring, IWSHM 2017 (Vol. 1, pp. 1607-1614). DEStech Publications.