prob 1: A solid steel shaft has to transmit 100 KW at 160 r.p.m. Taking allowable shear stress as 70 MPa, find the suitable diameter of the shaft. the Maximum torque transmitted in each revolution exceeds the mean by 20%.
{ Ans:d=80 mm}
Prob 2: Select a suitable diameter for a solid circular shaft to transmit 200 HP at 180 rpm. The allowable shear stress is 90 Mpa and allowable angle of twist is for every 5m length of shaft . Take C/G = 82 GPa
{ Ans: d from fs=................, d from angle=....................., suitable diameter=..................... }
Prob 3: A shaft is transmitting power of 50.5 kw at 120 rpm. if the shear stress is not to exceed 40 MPa,find the suitable diameter of the shaft.
{ Ans:d=80 mm}
Prob 4: A solid shaft is subjected to torque of 1.6 KN-m. Find the necessary diameter of the shaft, if the allowable shear stress is 60 Mpa. the allowable twist is 1 degree for every 2m length of shaft c=80 Gpa.
{ Ans:d=51.4,d=69.56}
Prob 5: A shaft is transmitting 100 kW at 180 r.p.m if the allowable shear stress in the shaft material is 60 MPa, determine the suitable diameter for the shaft. The shaft is not to twist more than 1 degrees in a length of 3 meter. G=80 Gpa.
{ Ans:d=103.8}
Prob 6: A shaft has to transmit 105 KW at 160 rpm. If the shear stress is not to exceed 65 Mpa and angle of twist in the length of 3.5m must not exceed 1 degree, find the diameter of the shaft. Take C=80 GPa
{ Ans: d=78.86 mm, d=63.27 mm}
Prob 7. A solid circular shaft of 100 mm diameter is transmitting 120 kW at 150 r.p.m. Find the intensity of shear stress in the shaft.
{ Ans:fs=39 Mpa}
W-15 Prob 8 :A solid circular shaft of diameter 100 mm and length 2.7 m is subjected to a torque of 30 kN.m. Assume, G = 75 GPa. Find maximum stress induced.
{ Ans:fs= Mpa}