a motor has constant power, as the shaft from the shaft speeds up to turn faster, does this increase or decrease the shear stress in the shaft?use the appropriate power and/or torque equations to explain

a motor has constant power, as the shaft from the shaft speeds up to turn faster, does this increase or decrease the shear stress in the shaft?use the appropriate power and/or torque equations to explain

Electrical Transformers and Rotating Machines

4th Edition

ISBN:9781305494817

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter20: Motor Nameplate Data

Section: Chapter Questions

Problem 8RQ: A motor develops 189 ft-lb of torque at 1745 RPM. What is the horse-power output of the motor?

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Concept explainers

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.

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