Reference-free damage localization in time-space domain for structural health monitoring of X-COR sandwich composites

Research output: Contribution to journalArticle

Abstract

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.

Original languageEnglish (US)
Pages (from-to)371-385
Number of pages15
JournalJournal of Intelligent Material Systems and Structures
Volume30
Issue number3
DOIs
StatePublished - Feb 1 2019

Fingerprint

Structural health monitoring
Guided electromagnetic wave propagation
Composite materials
Ultrasonic transducers
Delamination
Macros
Transducers
Reinforcement
Signal processing
Decomposition
Fibers

Keywords

  • converted wave mode
  • damage localization
  • facesheet delamination
  • structural health monitoring
  • time-space representation
  • Ultrasonic guided wave
  • X-COR sandwich composite

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanical Engineering

Cite this

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title = "Reference-free damage localization in time-space domain for structural health monitoring of X-COR sandwich composites",
abstract = "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.",
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