Question

Which of the following is correct?

(a) G = 0.5*E / (1+μ)

(b) G = 0.5*E

(c) G = 0.5*E*(1+μ)

(d) G = 0.5 / (1+μ)

I have been asked this question in unit test.

This interesting question is from Structures Fundamentals topic in portion Structures and Loads of Aircraft Design

Answer 1

The correct answer is (a) G = 0.5*E / (1+μ)

To explain: Above equation is showing a typical relationship between Shear modulus G, elastic constant E and Poisson’s ratio µ. Correct relationship is given as follows: G = 0.5*E / (1+μ) where, G = shear modulus, E = elastic constant or Young’s modulus, μ = Poisson’s ratio.