Self-detection of delamination in active fiber composites

Dwo Wen Wang*, Wen Chin Tsai, Ching-Chung Yin

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

This paper presents a novel method to monitor the bonding condition of active fiber composites (AFCs). AFCs can be used as integrated acoustic sensors/actuators to compose functional structures because of their excellent properties. Debonds between AFC patch and host structure should be avoided and surveyed through its service life. A partially debonded patch bears an axial extensional vibration which is excited by a sinusoidal voltage and detected by the interdigital electrodes symmetrically aligned on opposite surfaces of the patch. The electric impedance and mechanical displacement of the AFC patch adhered on an aluminum plate were investigated in a broad frequency range. The modal characteristics depend on the size of debond and stiffness of adhesive in front of the edge of delamination. The debonding ratio of the AFC patch is in inverse proportion to the resonant frequency of the fundamental mode. Feasibility of self-detecting the progressive delamination between AFC patch and host plate is demonstrated through computational and experimental results.

Original languageEnglish
Title of host publicationCIMTEC 2008 - Proceedings of the 3rd International Conference on Smart Materials, Structures and Systems - Emboding Intelligence in Structures and Integrated Systems
PublisherTrans Tech Publications Ltd
Pages447-452
Number of pages6
ISBN (Print)9783908158134
DOIs
StatePublished - 1 Jan 2008
Event3rd International Conference on Smart Materials, Structures and Systems - Embodying Intelligence in Structures and Integrated Systems, CIMTEC 2008 - Acireale, Sicily, Italy
Duration: 8 Jun 200813 Jun 2008

Publication series

NameCIMTEC 2008 - Proceedings of the 3rd International Conference on Smart Materials, Structures and Systems - Emboding Intelligence in Structures and Integrated Systems
Volume56

Conference

Conference3rd International Conference on Smart Materials, Structures and Systems - Embodying Intelligence in Structures and Integrated Systems, CIMTEC 2008
CountryItaly
CityAcireale, Sicily
Period8/06/0813/06/08

Keywords

  • Active Fiber Composites
  • Delamination
  • Impedance
  • Resonance

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