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Proceedings Paper

Material testing by the laser speckle strain gauge
Author(s): Ichirou Yamaguchi; Koichi Kobayashi
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Paper Abstract

By means of the laser speckle strain gauge, which directly detects the elongation or contraction of microscopic structures of a diffusely reflecting surface from speckle displacement, we measured both stress-strain curve of polymer materials in the biaxial mode by loading specimens on a commercial testing machine and thermal strain of metal and polymers. In the experiments we derived Poisson's ratio and thermal expansion coefficients of various materials. We observed good agreement of the results with those obtained by other methods.

Paper Details

Date Published: 1 December 1991
Proc. SPIE 1554, Second International Conference on Photomechanics and Speckle Metrology, (1 December 1991); doi: 10.1117/12.49544
Show Author Affiliations
Ichirou Yamaguchi, Institute of Physical and Chemical Research (Japan)
Koichi Kobayashi, Toyo Seiki Co. (Japan)

Published in SPIE Proceedings Vol. 1554:
Second International Conference on Photomechanics and Speckle Metrology
Fu-Pen Chiang; Fu-Pen Chiang, Editor(s)

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