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Question-and-Answer flashcards covering key design formulas for stresses, couplings, clutches, power screws, gears, springs, brakes, flywheels, bearings, keys, and pressure vessels.
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Power required to punch a hole (energy method).
P = (E / t) = F·v = 2π·T·n
Energy expended in punching a hole (based on ultimate shear).
E = ½·F·t or E = ½·S_u·A·t
Fracture efficiency of a power screw (square) with no friction.
η0 = T0 / T
Relationship of number of friction surfaces to disks in a multiple-disk clutch.
n = NT – 1 (where NT = total disks)