Question 12 20 Points A machine is to punch a 25-mm diameter hole from a 19 mm thick steel plate having an ultimate shea

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Question 12 20 Points A Machine Is To Punch A 25 Mm Diameter Hole From A 19 Mm Thick Steel Plate Having An Ultimate Shea 1 (45.12 KiB) Viewed 29 times

Question 12 20 Points A machine is to punch a 25-mm diameter hole from a 19 mm thick steel plate having an ultimate shear strength of 400 MPa. A flywheel is to be designed with a mean diameter of 1 meter, a maximum operating speed of 200 rpm, and a coefficient of fluctuation of 0.1. The flywheel's hub and arms' weight may be taken to be 10% of the rim's weight. The width of the rim is to be five times its thickness. Determine the rim thickness in mm necessary for a density of 7200 kg/m3. A 67.7 B) 72.3 (C) 87.7 D 77.7