Question

_{The shaft shown in the following figure is supported by smooth journal bearings at A and B. Due to the transmitted power to and from the shaft, the belts on the pulleys are subjected to the tensions shown. The shaft is made of a material having yield strength is 680 MPa and the shear strength is 520 MPa. Employ a factor of safety of 3. z 150 mm D A 30° 200mm 50 N 130° 100 N 30° 150 N 100 mm 400mm 30° B 250 N 250 mm - It is required to do the following: 1- Draw the free-body diagram of the shaft. 2- Find the induced moment at pulleys C and D. 3- Find the reactions at bearings A and B.}

Answer 1

8 of BD of shaft I SON 30 RAH C 1B 30 TOON Коу * * 200 .400 250 e Moment at o 100x 0.15 15Nm. Moment at C = 1508 0.1 15Nm. Ray they = 100 cos 30 - 150 s 30 - {fy=0 RBH - 100 senzo-150 sen30 Đ E FA=0 EMA=0 100 cos30) 0.2 = 15000x30) (0.6) + Re, xo 85 ² RBY = - 71.319 N. SAY 28.018N. Kan = (loo singo) 6.65) +150 singo) 0:25 2 60.29N 0.85 2 RBH = 185294 N.