TY - GEN
T1 - A reference-free guided wave based damage localization approach for highly dispersive structures
AU - Li, Guoyi
AU - Rajadas, Abhishek
AU - Chattopadhyay, Aditi
AU - Huff, Daniel W.
N1 - Funding Information:
The authors thank the funding source provided by Adaptive Intelligent Materials and Systems (AIMS) Industry Consortium Core Project; co-sponsor: The Boeing Company (Technical Monitor: Daniel W Huff).
PY - 2017
Y1 - 2017
N2 - 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.
AB - 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.
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U2 - 10.12783/shm2017/14037
DO - 10.12783/shm2017/14037
M3 - Conference contribution
AN - SCOPUS:85032435667
T3 - 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
SP - 1607
EP - 1614
BT - Structural Health Monitoring 2017
A2 - Chang, Fu-Kuo
A2 - Kopsaftopoulos, Fotis
PB - DEStech Publications
T2 - 11th International Workshop on Structural Health Monitoring 2017: Real-Time Material State Awareness and Data-Driven Safety Assurance, IWSHM 2017
Y2 - 12 September 2017 through 14 September 2017
ER -