Question: ( 2 0 points ) A 8 0 mm by 8 0 mm square hole is required in a 1 0 mm thick piece of

(20 points) A 80 mm by 80 mm square hole is required in a 10 mm thick piece of sheet metal. A compressive force (P) equal to 200 kN is applied on a punch to create the hole.
a. What is the average normal stress in the punch during punching?
b. What is the average shear stress in the sheet metal during punching?
( 2 0 points ) A 8 0 mm by 8 0 mm square hole is

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