Question

A wire is stretched such that its volume remains constant. The Poission’s ratio of the material of the wire is

• A. 0.2
• B. 0.5
• C. 0.3
• D. 0.4

Answer 1

Answer: (B)

Poisson’s ratio of a stable, isotropic, linear elastic material lies in the range - 1 < $\sigma$ < 0.5, theoretically. For most of the materials $\sigma$ < 0.5. This is because, moduli of elasticity should have positive values. Negative Poisson’s ratio in DESIGNED materials and in some anisotropic materials has been observed. $\therefore$ For most of the materials $\sigma$ < 0.5. $\therefore$