$1-80.$ The cotter pin is used to hold the two rods together.

Determine the smallest thickness $t$ of the pin and the smallest

diameter $d$ of the rods. All parts are made of steel for which

the failure normal stress is ${}_{\text{f}\text{a}\text{i}\text{l}}=500$MPa and the failure

shear stress is ${}_{\text{f}\text{a}\text{i}\text{l}}=375$MPa. Use a factor of safety of

$(F.S.{)}_t=2\mathrm{.}50$ in tension and $(F.S.{)}_s=1\mathrm{.}75$ in shear.

Anwser are d$=13\mathrm{.}8$mm$,$ t$=7\mathrm{.}00$mm