Q$2$

The flat bar shown here is loaded in tension. Dimensions are in millimeters. $"$R$"$ means Radius; $\frac{O}{?}$ means Diameter.

A$)$ Find the stress concentration factor for the area, A$,$ near the radiused fillet where the bar gets narrower. Use the stress concentration factor charts.

B$)$ Find the stress concentration factor for the area, B$,$ near the hole. Use the stress concentration factor charts $$

C$)$ If the axial force, F$,$ got large enough, where would the bar break? $[$Hint$,$ you need to determine the maximum stress, not just the concentration factor.$]$