Nfs 2 Syp 80 000 psi Se 44 000 psi Kft 135 Kfb 135 A rot

N_fs = 2, S_yp = 80, 000 psi, S_e = 44, 000 psi, K_ft =1.35, K_fb = 1.35 A rotating shaft carries a fluctuating bending stress of 20000 psi. The rotating shaft also of 5000psi that fluctuates 20% each way from the mean value. Determine whether the given shaft loads are satisfactory according to the Maximum Distortion Energy theory of failure.