Prob. $6\mathrm{.}2-2$

Couples $M_0$ are applied to a steel strap of length $L=30in.$ and thickness $h=\frac{1}{8}in.$ to bend it into the form of a circular arc. The deflection $$ at the midpoint of the arc, measured from a line joining the tips, is $3\mathrm{.}5$ in $.$

$($a$)$ Determine the radius of curvature $,$ of the strap, measured from the center of curvature $C$ to the neutral axis of the strap $($which passes through the center of the cross section of the strap$).$

$($b$)$ Calculate the maximum extensional strain, $lo{n}_{\text{m}\text{a}\text{x}},$ in the curved strap.