Application of Holographic Interferometry to the Measurement of Poisson's Ratio

Abstract

Holographic interferometry is applied to obtain the contour lines of deformation of a plate by pure bending. According to the theory of elasticity they are hyperbolas and from the angle between their asymptotes Poisson's ratio of the plate material is determined. By the real time method an accuracy of 1% is attained in the case of steel plates. The dependence of the value on the plate shape is also examined.