Question

If G is the modulus of rigidity, E the modulus of elasticity and μ the Poisson's ratio for a material, then what is the expression for G ?

• A. $G=\frac{3E}{2(1+2\mu )}$
• B. $G=\frac{5E}{(1+\mu )}$
• C. $G=\frac{E}{2(1+\mu )}$
• D. $G=\frac{E}{(1+2\mu )}$

Answer 1

The correct option is C $G=\frac{E}{2(1+\mu )}$

$E=2G(1+\mu )$
$\Rightarrow G=\frac{E}{2(1+\mu )}$