$3-94.$ Figure P$3-94$ shows the proposed design for a tensile rod. The

larger diameter is known, $D=1\mathrm{.}00in,,$ along with the hole diameter,

$a=0\mathrm{.}50in.$ It has also been decided that the stress concentration foc$-$

tor at the fillet is to be $1\mathrm{.}7.$ The smaller diameter, $d,$ and the filket

radius, $r,$ are to be specified such that the stress at the fillet is the

same as that at the hole.

FIGURE P$3-94$

Tersile rod for Problem $3-94.$