The shaft is supported by smooth journal bearings at A and B that only exert vertical reactions on the shaft. Determine a.) its smallest diameter d if the allowable bending stress is Oallow = 180 MPa, b.) the maximum shear stress based on the diameter d calculated in part a.

The shaft is supported by smooth journal bearings at A and B that only exert vertical reactions on the shaft. Determine a.) its smallest diameter d if the allowable bending stress is Oallow = 180 MPa, b.) the maximum shear stress based on the diameter d calculated in part a.

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

The shaft is supported by smooth journal bearings at A and B that only exert vertical reactions on the
shaft. Determine a.) its smallest diameter d if the allowable bending stress is oallow= 180 MPa, b.) the
maximum shear stress based on the diameter d calculated in part a.
12 kN/m
B
4 m
1.5 m

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