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Stress analysis of in-plane vibration of 2-D structures by a laser speckle method

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Abstract

By time-average recording of laser speckles formed on the surface of a structure under sinusoidal oscillation, isothetics along any direction can be obtained by Fourier filtering the resulting specklegram. Principal strains and stresses can then be calculated through the use of strain-rosette equations and the stress-strain law, respectively.

© 1980 Optical Society of America

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Equations (13)

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