Required information

A utility hook was formed from a round rod of diameter $d=10\mathrm{.}00mm$ into the geometry shown in the figure. Given:

$F=1\mathrm{.}00kN,L=400\mathrm{.}0mm,$ and $D_i=37\mathrm{.}5mm.$

What is the stress at the inner surface at section $A-A?$

The stress at the inner surface is determined to be

$k\frac{N}{m}{m}^2.($Round the final answer to three decimal places.$)$