Problem 1 (40 Marks) The shaft shown in the figure below is machined from AISI 1040 CD steel. The shaft rotates at 1600 rpm and is supported in rolling bearings at A and B, where the reaction forces: A = 9 kN and B = 7 kN. a) Where is the critical location for the failure of the part? (5 Marks) b) Determine the endurance strength of the part. (10 Marks) c) Determine the minimum fatigue factor of safety based on achieving infinite life. Also check for yielding. (15 Marks) d) If infinite life is not predicted, estimate the number of cycles to failure. After how many hours is the shaft going to fail? (10 Marks) {Notes: all fillets 1.6 mm) -203 5 kN 203 -203 11 kN 32 41 48 45 32 101 254 254 0.5 0.5 All dimensions in mm B B V 9.00 9.00 0.00 -2.00 -2.00 -7.00 -7.00 (mm) Shear Diagram 1,827.00 1,421.00 0.00 0.00 (mm) Homestagram