MEMS: From Micro Devices to Wireless Systems

Vol. 7, Special Issue, October 2009, pp.5-14

A Novel Strain Gauge with Damping Capability

Xiaohua LI and Cesar LEVY

Dept. of Mechanical and Materials Engineering

Florida International University, Miami, FL 33174, USA

Tel.: +1-305-348-3643, fax: +1-305-348-1932

E-mail: xli003@fiu.edu, levyez@fiu.edu

Received: 28 August 2009   /Accepted: 28 September 2009   /Published: 12 October 2009

Abstract: The goal of this work is to investigate the properties of a new type of multifunctional composite which is based on multi-walled carbon nanotubes (MWCNT). The composite was prepared from a paper like MWCNT film which was sandwiched between two adhesive layers. Two point probe and four point probe methods were used to test its mechanical strain sensing properties. Nanoindentation and direct shear tests were used to acquire the Young’s modulus and shear modulus of MWCNT film composite. Its structural damping properties were investigated via a free vibration test. This new type of carbon nanotube based composite may potentially serve simultaneously as both a strain gauge and a damping treatment for use in structural vibration control.

Keywords: Multiwalled carbon nanotube film, Strain gauge, Structure damping

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