Evaluation of in-plane shear modulus of composite laminates using holographic interferometry

Takenori Maeda; Vijayan Baburaj; Tatsuzo Koga

doi:10.1117/1.601401

1 July 1997 Evaluation of in-plane shear modulus of composite laminates using holographic interferometry

Takenori Maeda, Vijayan Baburaj, Tatsuzo Koga

Optical Engineering, Vol. 36, Issue 7, (July 1997). https://doi.org/10.1117/1.601401

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.

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Takenori Maeda, Vijayan Baburaj, and Tatsuzo Koga "Evaluation of in-plane shear modulus of composite laminates using holographic interferometry," Optical Engineering 36(7), (1 July 1997). https://doi.org/10.1117/1.601401

Published: 1 July 1997

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