Question

The relationship between Y, $\eta$ and $\sigma$ is

• A. $Y=2\eta (1+\sigma )$
• B. $\eta =2Y(1+\sigma )$
• C. $\sigma =\frac{2Y}{(1+\eta )}$
• D. $Y=\eta (1+\sigma )$

Answer 1

The correct option is A $Y=2\eta (1+\sigma )$

By using stress relations on unit solid element, this relation can be derived:
$\eta =\frac{Y}{2(1+\sigma )}Thus,Y=2\eta (1+\sigma )$