Question

Poison's ratio for most of the engineering materials is in the range of:

• A. 0.01 to 0.05
• B. 0.05 to 0.1
• C. 0.1 to 0.25
• D. 0.25 to 0.35

Answer 1

Answer:

D. 0.25 to 0.35

Poisson's ratio is the ratio of transverse strain to longitudinal strain. Most materials have values between 0.0 and 0.5. A perfectly incompressible material has a Poisson's ratio of 0.5. Steels and rigid polymers exhibit values of about 0.3, increasing to 0.5 for post-yield deformation. Rubber has a Poisson ratio of nearly 0.5, while cork's Poisson ratio is close to 0, showing little lateral expansion when compressed. The given range of Poisson's ratio for engineering materials is 0.25 to 0.35.