$4$

Problem #$2(25$ points$)$

A$.$ In the clevis shown, find the minimum bolt diameter d and the minimum thickness t each yoke that will support a load $P=14$kips without exceeding a shearing stress $12$ ksi and a bearing stress of $20$ ksi $.($Hint: $($:$1$kips$={10}^{3}lb,1$ksi$={10}^{3}l\frac{b}{i}{n}^2\}$

$($i$)$ Calculate the bolt diameter d $.$

$($ii$)$ Calculate yoke thickness t $.$

B$.$ A copper rod of length $L=18in.$ is to be twisted by torque $T$ until the angle of rotation between the ends of the rod is $5.$ If the allowable shear strain in the copper is $0\mathrm{.}0005$ rad $,$ what is the maximum permissible diameter d $.$