Applications of Poisson’s Ratio

Poisson’s Ratio is majorly used to analyze the strength of the material. However, it has got some other applications also which are mentioned below:

1. Poission’s Ratio in Bending

While bending a bar, the curvature of the bar perpendicular to the bending is governed by Poisson’s Ratio, while in the case of rubber anticlastic curvature i.e. convex along the longitudinal plane and concave along the perpendicular plane is observed.

2. Poisson’s Ratio in Anisotropic Material

Anisotropic Material is those which have direction-dependent properties. Examples include crystals, honeycombs, etc. In such objects, the Poisson’s Ratio is also direction dependent. Also, it can take any arbitrary large positive or negative value under the defined positive strain energy density.

3. Poisson’s Ratio in Viscoelastic Material

The viscoelastic material goes under creep which is a time-dependent phenomenon. In this case, Poisson’s Ratio is a function of time and also the frequency and the phase angle if there is sinusoidal deformation in the viscoelastic material.

4. Poisson’s Ratio in Phase Transformation

The Poisson’s Ratio of material is significantly affected by its phase transformation. At the point of phase transformation, the value of Poisson’s Ratio starts decreasing significantly and can even take a negative value as the bulk modulus of a material reduces at Phase Transformation Point.

Poisson’s Ratio is the negative ratio of transversal strain or lateral strain to the longitudinal strain of a material under stress. When a material particularly a rubber-like material undergoes stress the deformation is not limited to only one direction, rather it happens along both transversal and longitudinal directions. In this situation, material scientists are curious to know the ratio of transversal and longitudinal deformation that occurred in the object to know about the strength of the material.

In this article, we will learn about the longitudinal and transversal strain, the calculation of the Poisson Ratio, and other related aspects in detail.