Question

For a material having modulus of elasticity equal to 208 GPa and Poisson's ratio equal to 0.3, what is the modulus of rigidity ?

• A. 74.0 GPa
• B. 80.0 GPa
• C. 100.0 GPa
• D. 128.5 GPa

Answer 1

The correct option is B 80.0 GPa

$E=2G(1+\mu )$
$\Rightarrow G=\frac{E}{2(1+\mu )}=\frac{208}{2(1+0.03)}$
$=80GPa$