New Jersey City University Stress Analysis Exercise

I’m working on a Engineering multi-part question and need an explanation to help me study.

A cast iron flywheel with an outer diameter of 250mm and thickness of t = 20mm is press fit onto a

solid steel shaft of diameter 100mm, as seen below. An interface pressure of p = 25MPa holds at a

speed of 2,400RPM.

(a) Determine the torque, T, in kN-m that is transmitted by the flywheel at this speed

(b) What is the torque transmitted by the flywheel when the interface pressure is 0?

Let EC = 100GPa, ?C = 0.2, ES = 200GPa, ?S = 0.3, coefficient of static friction, f = 0.20 and density ? =

7.8kN*s2/m2

(note: density is the same for both materials)

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