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Optical Engineering

Evaluation of Young's modulus of a vibrating beam by optical method
Author(s): X. J. Kang; Cho Jui Tay; Chenggen Quan; Xiaoyuan He
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Paper Abstract

An optical technique for evaluating Young's modulus of a vibrating cantilever beam is presented. The technique utilizes two charge-coupled device (CCD) cameras to record and process the images of a vibrating beam. Equations relating the natural frequency with the imaging time are obtained, and Young's modulus as a function of the natural frequency is subsequently determined. The Young's modulus values are compared with those obtained using the conventional strain gauge method. The results show good agreement. The proposed technique is relatively simple and could be used to determine the Young's modulus of a wide variety of beam materials.

Paper Details

Date Published: 1 October 2003
PDF: 6 pages
Opt. Eng. 42(10) doi: 10.1117/1.1602089
Published in: Optical Engineering Volume 42, Issue 10
Show Author Affiliations
X. J. Kang, National Univ. of Singapore (Singapore)
Cho Jui Tay, National Univ. of Singapore (Singapore)
Chenggen Quan, National Univ. of Singapore (Singapore)
Xiaoyuan He, Southeast Univ. (China)

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