Journal
OPTICAL ENGINEERING
Volume 42, Issue 10, Pages 3053-3058Publisher
SPIE-INT SOCIETY OPTICAL ENGINEERING
DOI: 10.1117/1.1602089
Keywords
cantilever beam; natural frequency; Young's modulus
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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. (C) 2003 Society of Photo-Optical Instrumentation Engineers.
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