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QUESTION
A flywheel with a radius R = 200 mm is designed to spin up to 8000 rpm.
Use the expression for the maximum stress in a spinning disk in UASSP, 7, that for the stress intensity at a small enclosed crack from UASSP, 10 and data for cast iron from the CES EduPack to establish if the flywheel is safe. Take Poisson’s ratio ν for cast iron to be 0.33.
