What is Poisson’s Ratio?

Poisson’s ratio is the ratio of the amount of transversal expansion to the amount of axial compression for small values of these changes.

Poisson Ratio Definition

Poisson Ratio is defined as the negative ratio of the transversal strain to the longitudinal strain. It basically compares the change in the breadth of an object with respect to the change in the length of the object. It gives an idea about the strength of a material.

Poisson’s Ratio

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.

Table of Content

  • What is Poisson’s Ratio?
    • Poisson Ratio Definition
  • Longitudinal and Transversal Strain
  • Poisson’s Ratio Formula
    • Poisson Effect
  • Poisson’s Ratio Values for Different Materials
    • Poisson’s Ratio Range
    • People Also View:
  • Applications of Poisson’s Ratio
    • 1. Poission’s Ratio in Bending
    • 2. Poisson’s Ratio in Anisotropic Material
    • 3. Poisson’s Ratio in Viscoelastic Material
    • 4. Poisson’s Ratio in Phase Transformation
  • Poisson’s Ratio – Solved Examples

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

Similar Reads

What is Poisson’s Ratio?

Poisson’s ratio is the ratio of the amount of transversal expansion to the amount of axial compression for small values of these changes....

Longitudinal and Transversal Strain

When Stress is applied the change in dimension is seen along the direction of the stress applied and also the direction perpendicular to the stress applied. Let’s say when we apply tension stress on a horizontal bar, the length of the bar will increase along the direction of the applied stress. This is called Longitudinal Strain. Along with the increase in length, you will observe that the bar becomes thin in between i.e. the breadth of the bar decreases. This is what we call Transversal Strain. Both longitudinal and transversal strain go hand in hand but not at the same rate. To measure the relativeness of longitudinal and transversal strain we use Poisson’s Ratio....

Poisson’s Ratio Formula

As stated in its definition, Poisson Ratio is given as the negative of the ratio of the transversal strain to the longitudinal strain its formula is mentioned below:...

Poisson’s Ratio Values for Different Materials

Poisson’s Ratio is a scalar and a unitless quantity. It has a positive magnitude for tensile deformation while it has a negative value for auxetic materials like polymer....

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:...

Poisson’s Ratio – Solved Examples

Problem 1: The longitudinal strain for a wire is 0.02 and its Poisson ratio is 0.6. Find the lateral strain in the wire....

Poisson’s Ratio – FAQs

What is Poisson’s Ratio?...

Contact Us