Resistively shunted piezocomposites for passive vibration damping

Shridhar Yarlagadda, George A. Lesieutre, Shoko Yoshikawa, John Witham

Research output: Contribution to conferencePaper

7 Scopus citations

Abstract

The results of a theoretical and experimental study of 3-3 coupled resistively shunted piezocomposites are reported. The focus composite material consisted of poled piezoelectric whiskers in an epoxy matrix and was resistively shunted, with the shunt an integral part of the structure. The whiskers were axially poled for 3-3 type coupling. Two types of integral shunts were studied: resistive matrix and thin film resistor. A piezoelectric finite element model was developed to address dynamic behavior for both cases. Modeling results indicate the possibility of large increases in modal damping with some weight penalty. The critical design parameters are piezoelectric volume fraction, shunt resistance, location of piezoelectric whiskers within the structure and geometry. Fabrication and characterization techniques were developed for both shunt types. The use of a filler material to control matrix resistivity (via the percolation effect) also altered dielectric properties considerably. The thin film configuration proved easier to fabricate and the whiskers were poled after composite cure. Measured AW and capacitance values of the composite compared well with theoretical predictions.

Original languageEnglish (US)
Pages217-227
Number of pages11
DOIs
StatePublished - Jan 1 1996
EventAIAA/ASME/AHS Adaptive Structures Forum, 1996 - Salt Lake City, United States
Duration: Apr 18 1996Apr 19 1996

Other

OtherAIAA/ASME/AHS Adaptive Structures Forum, 1996
CountryUnited States
CitySalt Lake City
Period4/18/964/19/96

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Mechanics of Materials
  • Electrical and Electronic Engineering
  • Building and Construction
  • Civil and Structural Engineering

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  • Cite this

    Yarlagadda, S., Lesieutre, G. A., Yoshikawa, S., & Witham, J. (1996). Resistively shunted piezocomposites for passive vibration damping. 217-227. Paper presented at AIAA/ASME/AHS Adaptive Structures Forum, 1996, Salt Lake City, United States. https://doi.org/10.2514/6.1996-1291