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Poisson's ratio for aluminium ranges between-
1. 0.23 - 0.25
2. 0.25 - 0.26
3. 0.31 - 0.34
4. 0.27 - 0.30

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Correct Answer - Option 3 : 0.31 - 0.34

Explanation:

Poisson's ratio is the ratio of transverse strain to longitudinal strain.

\(\mu = - \frac{{{\epsilon_{(lateral)}}}}{{{\epsilon_{(longitudinal)}}}}\)

For perfectly isotropic elastic material, Poisson’s ratio is 0.25 but for most of the materials.

The value of Poisson's ratio lies in the range of 0 to 0.5.

Poisson's ratio for various materials are:

  • Cork: 0.0
  • Aluminium: 0.31
  • Cast iron: 0.21 – 0.26
  • Steel: 0.27 – 0.30
  • Stainless steel: 0.30 – 0.31
  • Copper: 0.33
  • Rubber: 0.5

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