You are designing the low speed shaft for a horizontal axis turbine which has to transmit50 kW of mechanical power at a rotational speed of 95 r/min.
Solid steel shafts are availablein half-inch increments starting at 2 inches outside diameter. The recommendedmaximum stress is 55 MPa. What size shaft should you specify?
An elastomeric shaft 2 m in length is used to deliver 100 kW of mechanical power to agenerator at 1800 r/min. The shaft diameter is 0.05 m and the shear modulus G is 0.9GPa.
(a) What is the total twist θ in the shaft?
(b) What is the total energy stored in the shaft?