Handbook for machine designers, shop men and draftsmen (1916)
Halsey, Frederick A. (Frederick Arthur), 1856-1935 · New York, McGraw-Hill book company, inc.; [etc., etc.] · leaf 218
e curve of a cubic parabola. The difference is, however, slightand need not be considered for practical purposes. Helical Springs in Torsion The strength and deflection of helical springs in torsion are usuallycalculated from the equations for the bending of straight beams.While these equations are… … Fig. 6.—The design of multiple springs. The formulas are: nd^M = —S323667 MDN Ct ^=— Ed* for round wire 6~ 2160 MDN \ *« ^^■^ ^^=—EJ*— in which If = twisting moment, Ib.-ins. d = diameter of round or side of square wire, ins., 5 = fiber stress, lbs per sq. in., a = angle of twist, deg. -D = mean…
Machine design
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