Question

The value of modulus of elasticity for a material is $200GN/m^2$ and Poisson's ratio is $0.25$. What is its modulus of rigidity?

• A. $250GN/m^2$
• B. $320GN/m^2$
• C. $125GN/m^2$
• D. $80GN/m^2$

Answer 1

The correct option is D $80GN/m^2$

The relationship between, $E,G$ and $\mu$ is
$E=G(1+\mu )$
$\Rightarrow G=\frac{E}{2(1+\mu )}=\frac{200}{2(1+0.25)}$
$\Rightarrow =80GN/m^2$