Problem 16.11. A hollow shaft is to transmit 300 kW power at 80 r.p.m. If the shear stress is not to exceed 60 Nimm? and the internal diameter is 0.6 of the external diameter, find the external and internal diameters assuming that the maximum torque is 1.4 times the mean. (AMIE, Winter 1986)

Problem 16.11. A hollow shaft is to transmit 300 kW power at 80 r.p.m. If the shear stress is not to exceed 60 Nimm? and the internal diameter is 0.6 of the external diameter, find the external and internal diameters assuming that the maximum torque is 1.4 times the mean. (AMIE, Winter 1986)

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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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.

Question

Problem 16.11. A hollow shaft is to transmit 300 kW power at 80 r.p.m. If the shear
stress is not to exceed 60 N/mm2 and the internal diameter is 0.6 of the external diameter, find
the external and internal diameters assuming that the maximum torque is 1.4 times the mean.
(AMIE, Winter 1986)

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