Stress analysis Of in-plane vibration Of 2-D structures by A laser speckle method.
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.
Chiang
F P
FP
Lin
C J
CJ