ABSTRACT
This chapter looks at design stress for shear applications and deals with a thorough analysis of torsional applications. It discusses the method of computing torsional shear stress and torsional deflection for members with noncircular cross sections. The chapter describes the general shapes of members having relatively high torsional stiffness. The angular deformation is measured on a fixed protractor scale with an indicator affixed to the rod. The motor uses electrical energy to produce a driving torque in its output shaft. The motor shaft is connected to the input shaft of the gear-type speed reducer through a flexible coupling. Since engines and motors are often rated in horsepower, conversions between kilowatts and horsepower can be critical. However, for torsional loading of circular members, a hollow section can be designed that is lighter than a solid section while subjecting the material to the same maximum torsional shear stress.
