Continuous sensors for mode selective actuation and reception of waves for structural health monitoring of woven composite laminates

Goutham R. Kirikera, Gabriela Petculescu, Sridhar Krishnaswamy*, Jan Drewes Achenbach

*Corresponding author for this work

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

Abstract

The quantitative evaluation of damage in woven composites using mode selective excitation of Lamb waves is reported in this paper. PVDF (polyvinylidene fluoride) comb sensors are used to generate and detect a single plate mode. The top electrode is a single set of equidistant fingers connected in parallel to the same potential while the bottom electrode is kept at ground. First, a pair of such sensors is used to generate and detect a single plate mode. Group velocity changes of a wave packet traveling through the damaged area are used for quantitative damage estimation. Second, a new electrode configuration is used in order to improve the receiver signal. The proposed configuration referred to as continuous sensors, is used in structural health monitoring (SHM) for detection of growing cracks. Theoretical and experimental results are presented. In addition, an analog circuitry to actuate the structure at high frequency (∼1MHz) based on energy tapped from a vibrating cantilever beam (∼20Hz) is developed, towards a high-frequency energy-harvested SHM.

Original languageEnglish (US)
Title of host publicationHealth Monitoring of Structural and Biological Systems 2007
Volume6532
DOIs
StatePublished - Nov 5 2007
EventHealth Monitoring of Structural and Biological Systems 2007 - San Diego, CA, United States
Duration: Mar 19 2007Mar 22 2007

Other

OtherHealth Monitoring of Structural and Biological Systems 2007
CountryUnited States
CitySan Diego, CA
Period3/19/073/22/07

Keywords

  • Continuous sensors
  • Energy harvesting
  • Mode selective excitation and reception
  • Quantitative prediction of damage

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

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