Page 48 - Civil Engineering Formulas

Torque formulas T = πD 3 f 16 π d i 4 ) – 16 (d o 4 f d o πd m d m 2 f 16 0.208S 3 f A 2 B 2 f + 1.8B 3A

Shaft torque formulas and location of maximum shear stress in the shaft Location of max shear Outer fiber Outer fiber Ends of minor axis Middle of sides Midpoint of major sides

Shaft section D d i d o d s d m S B A

Shaft angle-of-twist section formulas θ = twist, radians T = torque, in . lb (N . m) L = length of shaft, in (mm) N = modulus of rigidity, psi (MPa) b = shaft sectional dimensions, in (mm) a, Angle-of-twist θ = 32TL π D 4 N 32TL d o 4 4 d 1 )N – π (d 0 d s 2 )TL +

d i , s, d s , d m , Shaft section D d i d s d m s a b FIGURE 2.1
d o,
D,

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