It is desired to determine the diameter of a cold drawn steel bar to withstand a tensile preload of 36 kN and fluctuating tensile load varying (0- 72) KN. The bar have geometrical stress concentration factor K. = 2.02 corresponding to a fillet radius of 3.5 mm. Find diameter for infinite life Use: safety factor = 3, S. = 510 Mpa, S .. = 650 Mpa and uncorrected endurance limit = 364 Mpa

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Design of Shafts and Shaft Components

The shaft is basically defined as the machine element that rotates, is in circular cross-section, it is majorly used to transfer the power from one part of the system to another, or from a power generating machine to a power absorbing machine. The shaft is supported on bearings and is rotated with the help of a set of gears or pulleys that are used for the power transmission. Bending moment, torsion, and an axial force act upon the shaft. Designing of shaft primarily involves determining stresses at a critical point in the shaft that is arising due to loading.