Problem 115 What force is required to punch a 20-mm-diameter hole in a plate that is 25 mm thick? The shear strength is 350 MN/m2.
Solution 115
$V = \tau A$
$P = 350 \,[ \, \pi (20)(25) \, ]$
$P = 549\,778.7 \, \text{N}$
$P = 549.8 \, \text{kN}$ answer
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