मुफ्त प्वासों अनुपात कैलकुलेटर
प्वासों अनुपात (पॉइसन्स रेशियो) की गणना करें। अक्षीय और पार्श्व विकृति दर्ज करें।
Poisson's Ratio (nu)
0.300
Poisson's Ratio (nu) vs Lateral Strain (transverse)
सूत्र
## Poisson's Ratio When a material is stretched, it contracts laterally. Poisson's ratio quantifies this coupling. ### Formula **nu = -epsilon_lateral / epsilon_axial** Since lateral strain is opposite in sign to axial strain, nu is positive. Most metals have nu between 0.25 and 0.35. Steel is approximately 0.30, aluminium 0.33, rubber approaches 0.50 (incompressible). Cork is near zero.
हल किया गया उदाहरण
A steel rod under tension shows 0.001 axial strain and 0.0003 lateral contraction.
- 01nu = 0.0003 / 0.001 = 0.300
- 02This is a typical value for structural steel.
अक्सर पूछे जाने वाले प्रश्न
What are typical Poisson's ratio values?
Steel: 0.27-0.30, aluminium: 0.33, copper: 0.34, concrete: 0.15-0.20, rubber: 0.49-0.50, cork: approximately 0. Most engineering metals fall between 0.25 and 0.35.
Can Poisson's ratio exceed 0.5?
For isotropic materials, thermodynamic stability requires nu between -1 and 0.5. Values above 0.5 would imply volume increase under compression, which is physically impossible for conventional materials. Some auxetic metamaterials have negative Poisson's ratios.
Why does Poisson's ratio matter in engineering?
It affects multiaxial stress states, plate bending, thermal expansion analysis, and wave propagation. In pressure vessels and confined structures, lateral restraint creates significant secondary stresses governed by nu.
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