A drilling riser is used to drill a 4km deep hole into the seabed. The riser can be approximated as a hollow steel shaft of 185mm and 160mm outer and inner diameter respectively. If the power exerted is 230kW and the speed of rotation of the drill is 75RPM, calculate the maximum shear stress in the shaft and the twist of one end relative to the other in degrees.(Note the angle of twist of a 4km drill string is going to be >> 360o ) G = 89 kN/mm2

Q: Power transmitted by a hollow shaft at 300 rpm is 800 kW. The ratio of outer diameter to the inner…

A: Given data:-         power=800Kw     N=300rpm dodi=1.5         Tmax=1.4   Tmean      τper=80 MPa…

Q: A solid shaft 100 mm diameter transmits 100.6 horsepower with a maximum allowable shear stress 25…

A: given data as per question diameter of shaft = 100 mm =0.1 m power transmitted = 100.6 hp = 75.017…

Q: a steel shaft is 100 hp at a speed of 950 rpm. the shear stress is 8000 psi. what is the economical…

A:

Q: The figure below show a stepped shaft in torsion. Compute the maximum shear stress at the step when…

A:

Q: steel shaft with a diameter of 40 mm and the length of 1.1 m transmits 60 hp from an electric motor…

A:

Q: A hollow shaft with a length of 1103mm and outer diameter 73mm and inner diameter 50mm is required…

A:

Q: 3. A hollow steel shaft used in a construction auger has outer diameter dz-150 mm, and inner…

A: Given:Outer diameter, do=150mmInner diameter, di=100mmShear modulus of elasticity, G=75GPaTorque,…

Q: Q2) A hollow shaft is required to transmit 600 kW at 110 r.p.m., the maximum torque being 20%…

A: Step 1: Step 2: Step 3: Step 4:

Q: 11 A solid steel shaft 30 cm in diameter is rotating at a speed of 300 r.p.m. If the shaft is…

A: We know that a solid steel shaft with a diameter of 30 cm rotates at 300 rpm.If the shaft's ends are…

Q: A hollow shaft with a length of 1103mm and outer diameter 73mm and inner diameter 50mm is required…

A: According to the given data D=73mm d=50mm We need to find The polar second moment of area of the…

Q: 1. Fig. 8.4 shows the attachment of four pulleys to two different types of shafts. Pulleys B and…

A:

Combined Loading

Any functioning component, such as machine parts, structural members, pressure vessels, and so on, are all under the influence of more than one force. When anybody is under the influence of more than one force such as shear forces, bending moments, axial forces, torsion, and so on, then such body is said to be under combined loading. A very practical example of combined loading is the crankshaft of an internal combustion engine (IC engine). The crankshaft of the IC engine is under high rpm, which is caused due to the torsional forces. Due to the presence of piston, counterbalances, and internal imbalances, the crankshaft experiences lateral forces and due to the rise in temperature, the crankshaft undergoes thermal expansion, which pulls the crankshaft along the axial direction and lateral direction. The presence of unbalanced loads along the periphery of the crankshaft also induces a bending moment.