TY - JOUR
T1 - Reference-free damage localization in time-space domain for structural health monitoring of X-COR sandwich composites
AU - Li, Guoyi
AU - Chattopadhyay, Aditi
N1 - Funding Information:
The authors thank Dr Daniel W. Huff, Technical Monitor, for the support of this work including assistance in preparing the X-COR sandwich panels. In addition, the authors thank student workers, Mr Christopher Sorini and Mr Abhishek Rajadas, for manufacturing the samples at the Boeing facility in Mesa, AZ. The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This work was supported by the Adaptive Intelligent Materials and Systems (AIMS) Center Industry Consortium Core Project; Co-sponsor: The Boeing Company, Mesa, AZ, USA.
Publisher Copyright:
© The Author(s) 2018.
PY - 2019/2/1
Y1 - 2019/2/1
N2 - This article presents a guided wave based damage localization framework using a time-space analysis for structural health monitoring of X-COR sandwich composites with a reference-free perspective to overcome the difficulty in detecting reflected guided waves in a highly attenuated media. Transducers, including macro-fiber composites and piezoelectric wafers, are used to design the sensing paths. The time-space domain is constructed using de-noised signals that are processed by signal processing techniques including matching pursuit decomposition and Hilbert transform. The localization framework is then validated across a wide range of excitation frequencies in X-COR sandwich composites with seeded facesheet delamination. The results indicate that time-space analysis offers a high accuracy for detection and localization of internal damages and serves as a promising framework for structural health monitoring of complex sandwich composites with reinforcements. This work also provides a comprehensive study of the changes in group velocities, attenuation tendencies, and time-space resolution of actuated and converted modes under different excitation frequencies across a range of ultrasonic transducer sizes, thereby helping to improve reliability and accuracy of damage localization in time-space domain.
AB - This article presents a guided wave based damage localization framework using a time-space analysis for structural health monitoring of X-COR sandwich composites with a reference-free perspective to overcome the difficulty in detecting reflected guided waves in a highly attenuated media. Transducers, including macro-fiber composites and piezoelectric wafers, are used to design the sensing paths. The time-space domain is constructed using de-noised signals that are processed by signal processing techniques including matching pursuit decomposition and Hilbert transform. The localization framework is then validated across a wide range of excitation frequencies in X-COR sandwich composites with seeded facesheet delamination. The results indicate that time-space analysis offers a high accuracy for detection and localization of internal damages and serves as a promising framework for structural health monitoring of complex sandwich composites with reinforcements. This work also provides a comprehensive study of the changes in group velocities, attenuation tendencies, and time-space resolution of actuated and converted modes under different excitation frequencies across a range of ultrasonic transducer sizes, thereby helping to improve reliability and accuracy of damage localization in time-space domain.
KW - Ultrasonic guided wave
KW - X-COR sandwich composite
KW - converted wave mode
KW - damage localization
KW - facesheet delamination
KW - structural health monitoring
KW - time-space representation
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U2 - 10.1177/1045389X18810803
DO - 10.1177/1045389X18810803
M3 - Article
AN - SCOPUS:85060732838
SN - 1045-389X
VL - 30
SP - 371
EP - 385
JO - Journal of Intelligent Material Systems and Structures
JF - Journal of Intelligent Material Systems and Structures
IS - 3
ER -