A shaft shown in Figure 1, pulley A receives power and pulley B delivers power to the load. Assume, nd=1.5n_d =1.5nd=1.5, and the belt tension in loose side at B is 15% of the tension on tight side. Compute the size of the shaft at the critical location based on fatigue loading.
Two gears B and C are attached on a shaft, is supported by two bearings A and D as shown in figure: 1. The pitch diameter of the gear B and C are 900 mm and 600 mm respectively. The material of the shaft is AISI 1040 steel. Determine the shaft diameter using conservative approach of fatigue loading. Assume, krk_rkr = 2.4, kbk_bkb = 2.1 and design factor = 2.5
The Figure 7 shows a solid rotating shaft supported by bearings at points B and C, is driven by a Gear D with 150 mm pitch diameter. The force F acts at a pressure angle of 20∘20^{\circ}20∘ and transmits torque Ta=340 N-mT_a = 340 \text{ N-m}Ta=340 N-m. The shaft is machined from AISI 1040 steel. Perform a fatigue failure analysis to determine the minimum allowable diameter of the 250 mm section of the shaft, assume sharp fillet radii at the bearing shoulders.
The section of shaft shown in the Figure 3 is to be designed to approximate relative sizes of d=0.75Dd = 0.75Dd=0.75D and r=D/20r = D/20r=D/20 with diameter d conforming to that of standard metric rolling-bearing bore sizes. The shaft is to be made of SAE 2340 steel, heat treated to obtain minimum strengths in the shoulder area of 1226 MPa ultimate tensile strength and 1130 MPa yield strength with a Brinell hardness not less than 370. At the shoulder the shaft is subjected to a completely reversed bending moment of 70 N.m accompanied by a steady torsion of 45 N.m. Use a design factor of 2.5 and size the shaft for an infinite life.