A punch for making holes in steel plates is shown in Fig. below. Assume that a punch having diameter d = 22 mm is used to punch a hole in an 8-mm plate, as shown in the cross-sectional view (Fig. b). If a force P = 125 kN is required to create the hole, what is the average shear stress in the plate and the average compressive stress in the punch? P=125 kN d-22 mm -8.0 mm (a)

A punch for making holes in steel plates is shown in Fig. below. Assume that a punch having diameter d = 22 mm is used to punch a hole in an 8-mm plate, as shown in the cross-sectional view (Fig. b). If a force P = 125 kN is required to create the hole, what is the average shear stress in the plate and the average compressive stress in the punch? P=125 kN d-22 mm -8.0 mm (a)