Chapter 11, Problem 11.18P

A long, flat steel bar $\text{4}$ in. wide and $\frac{3}{8}$ thick is reduced in width to $\text{3}$ in. There are circular fillets of $\frac{1}{2}$ radius on each side. If the bar is subjected to an axial tensile load of $\text{12},000$ lb, calculate

a. the average tensile stress in the wide portion of the bar some distance from the change in section.

b. the average tensile stress in the narrow part of the bar.

c. the maximum tensile stress adjacent to the circular fillet.