Question

A stapler works by "shearing" one staple off of a row of staples. Assume that the staple has a bonded thickness of 0.05" along its edge. a. If F #, determine the shear stress in the bond along the edge of the staple. b. If we choose to require--# of force to shear one of the staples, how strong (in psi) should we make the bond between the staples? 6. 0.5 in. 0.3 in.

Answer 1

The bonded area of stapler pin, A = 2 x (0.3 X 0.05) + 0.5 x 0.05 = 0.055 in2

(a) Let us assume Force F = 1.2 #

Shear stress = F/A = 1.2 / 0.055 = 21.81 psi

(b) Let us assume Force F = 4.8 #

Shear stress = F / A = 4.8/0.055 = 87.27 psi