Martin, Louis Adolphe, 1880- · New York, J.Wiley & Sons, Inc.: [etc. etc.] · leaf 148
would be—1 or the unit strain n is — = tan 4>, and as <t> is very small we may place tan 4> = 4>. <p is thus the unit strain, and analogously to *- = E we s put 5 = G> where G is the modulus of elasticity of shear.To obtain the angle of twist, consider a portion of the TORSION… … Now the arc BC = 4>dx = rd/3,or so that dp=^, butr dp = g and q- = r; Tdx UG and the total angle of twist, 6, in a bar J inches long is 0 = X fldx = IL. 1fi J a IVG Exercise 136. A steel shaft 2§ inches in diameter carriesa pulley 30 inches in diameter; the difference in tensions onthe two parts…
Mechanics
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