Poisson's ratio is one of the indicators of anisotropy, as it reflects how much wood deforms in the transverse direction when it is loaded in the longitudinal direction, or vice versa.

The theoretical method for calculating Poisson's ratio involves using a mathematical formula that relates the ratio to other elastic constants of the material, such as Young's modulus (E), shear ...

Negative Poisson’s ratio If the Poisson’s ratio of the material if positive, then tensile/compressive strains in the x-direction produce tensile/compressive strains in the y- and z-directions, just ...

The Poisson’s ratio measures the length and width of a material undergoing transformation as it is stretched in a longitudinal direction. Application of the ISO 527-2 test standard helps ...

Consider the animation below of such a material, and study how a negative value for Poisson’s ratio is possible with this material. As can be seen here, a compressive axial load produces contraction ...