The elasticity and resistance of the materials of engineering (1915)
Burr, William H. (William Hubert), 1851-1934 · New York, John Wiley & Sons, inc.; [etc., etc.] · leaf 811
short length dl of theRadi sin4> spiral rod to rotate throughthe angle adl, inducing amovement of that end, rela-tive to the axis of the spiral,perpendicular to the axis ofthe rod, equal to Radl, asshown by Fig. 3. The hori-zontal component of this-Budi cos 0 movement tangent to the-spiral… … Fig. 3. •Jtotdi sin -Rudl Fig. 4- r=Rla sin <t>=RtAnd the angle of twist is Ml cos (/)+Msin 0 Q sm (/>. (10) r=^=/ Q sm<#.. (loa) Art. 120.] HELICAL SPIRAL SPRINGS. 755 The axial component of the same movement, as shownby Fig. 3 is, Radl cos </>. Hence the total axial movementdue…
Strength of materials · Building materials
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