Sensing mechanical properties of solid materials with bimorph piezo transducers

Yunche Wang, Chih Chin Ko, Tien Shu Chang

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

Abstract

Mechanical properties of materials, such as Young's modulus, shear modulus and linear vis-coelastic damping, are experimentally measured with a thin-film cantilever shaker. The experimental apparatus consists of a bimorph piezoelectric transducer acting as an actuator to generate base excitation to the cantilever, which is analogous to earthquake causing building vibration. The motion of the cantilever is monitored by a pair of fiber optics to measure the displacements of the fixed end and the sample. Linear viscoelastic properties of the material are measured from the resonant frequencies of the vibrating cantilever. Young's modulus and shear modulus are measured from bending and torsion resonant peaks, respectively. For high loss materials, loss tangent of the materials is obtained from the Lorenzian curve fit around the resonant peak. Material properties at various frequencies are measured by changing the length of the specimens. Furthermore, by introducing crack-like defects, the measured resonances, which may be viewed as a measure of effective moduli, are able to be adopted to locate the crack via the method of system identification.

Original languageEnglish
Title of host publicationMaterials and Applications for Sensors and Transducers II
PublisherTrans Tech Publications Ltd
Pages289-292
Number of pages4
ISBN (Print)9783037856161
DOIs
Publication statusPublished - 2013 Jan 1
Event2nd International Conference on Materials and Applications for Sensors and Transducers, IC-MAST 2012 - Budapest, Hungary
Duration: 2012 May 242012 May 28

Publication series

NameKey Engineering Materials
Volume543
ISSN (Print)1013-9826
ISSN (Electronic)1662-9795

Other

Other2nd International Conference on Materials and Applications for Sensors and Transducers, IC-MAST 2012
CountryHungary
CityBudapest
Period12-05-2412-05-28

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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  • Cite this

    Wang, Y., Ko, C. C., & Chang, T. S. (2013). Sensing mechanical properties of solid materials with bimorph piezo transducers. In Materials and Applications for Sensors and Transducers II (pp. 289-292). (Key Engineering Materials; Vol. 543). Trans Tech Publications Ltd. https://doi.org/10.4028/www.scientific.net/KEM.543.289