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Optical Engineering

Evaluation of in-plane shear modulus of composite laminates using holographic interferometry
Author(s): Takenori Maeda; Vijayan Baburaj; Tatsuzo Koga
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Paper Abstract

A test method for the evaluation of the in-plane shear modulus of composite laminates is presented. The method is essentially a resonance test on a cantilevered rectangular orthotropic laminate using laser holographic interferometry. Based on Rayleigh’s quotient, a simple formula is derived to determine the in-plane shear modulus using the resonance frequency of the first torsional vibration. An appropriate value of the length-to-width (aspect) ratio of the specimen is suggested to evaluate the in-plane shear modulus accurately. The results show that the measured in-plane shear moduli by the present method agree well with the modulus obtained by a ±45-deg off-axis tensile test.

Paper Details

Date Published: 1 July 1997
PDF: 5 pages
Opt. Eng. 36(7) doi: 10.1117/1.601401
Published in: Optical Engineering Volume 36, Issue 7
Show Author Affiliations
Takenori Maeda, Univ. of Tsukuba (Japan)
Vijayan Baburaj, Univ. of Tsukuba (Japan)
Tatsuzo Koga, Univ. of Tsukuba (Japan)

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