Answer to Question #320832 in Electrical Engineering for Jhay Jeff

Question

2. If the ultimate shear strength of a steel plate is 35000psi, what force is

necessary to punch a 0.35 in. diameter hole in a 0.255 in. thick plate?

( Ans F=9813.55 lb )

Answer 1

$\sigma=\frac{F}{A}$

$F=\sigma A=\sigma\pi d t$

$F={\rm 35000\: psi\times3.14159\times 0.35\: in\times 0.255\: in}\\ =9813.55\:\rm lb$