
Calculation of Poisson's Ratio of Glasses 
Poisson's ratio, µ, may be determined from Young's modulus, E, and the shear modulus, G, by the equation µ = E / (2·G)  1.
Influences of selected glass component additions on Poisson's ratio of a specific base glass, calculated from the Young's modulus and the shear modulus. The diagram will change nonlinearly for other base glasses. (click image to enlarge)