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Poisson’s Ratio Calculator
The Poisson’s Ratio Calculator allows engineers to calculate Poisson’s Ratio based on a material. Poisson’s Ratio can be calculated via two methods. The first option is entering Transverse and Axial Strain and the second option is by using Young’s Modulus and Shear Modulus. Typically, common materials will have a Poisson’s Ratio between 0 and 0.5.
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About the Poisson’s Ratio Calculator
What is Poisson’s Ratio?
Poisson’s ratio is a fundamental material property that characterises the relationship between transverse (lateral) strain and axial (longitudinal) strain when a material is subjected to an external force. It quantifies the material’s ability to expand or contract laterally in response to applied tensile or compressive forces.
What does Poisson’s Ratio Measure?
Poisson’s ratio measures the ratio of transverse strain to axial strain within a material under the influence of external loads. This property is crucial in understanding how a material deforms in different directions and helps engineers predict its behaviour under various mechanical loading scenarios.
How to calculate Poisson’s Ratio?
Two distinct methods, both available in the above Poisson’s Ratio Calculator, can be used to calculate Poisson’s Ratio (v). These include:
- Transverse Strain & Axial Strain
- Young’s Modulus & Shear Modulus
Poisson’s Ratio (v) can be calculated using Transverse Strain and Axial Strain with the formula:
Poisson’s Ratio (ν) can be calculated using Young’s Modulus (E) and Shear Modulus (G) with the formula:
This formula can be rearranged to solve for Poisson’s Ratio (v):
Poisson Ratio of Steel
The below table provides a breakdown of the different Poisson’s ratio of Steel. The steel poisson ratio for structural steel is typically taken as 0.27, but below shows a range of different poisson ratios for steel:
| Steel Type | Poisson’s Ratio |
|---|---|
| Aluminium (Alloy) | 0.32 |
| Stainless Steel | 0.3-0.31 |
| Structural Steel | 0.27-0.30 |
| Cast Iron | 0.21-0.26 |
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