The rotating shaft shown in the figure is machined from AISI 1020 CD steel. It is subjected to a force of F = 6 kN. Find the minimum factor of safety for fatigue based on infinite life. If the life is not infinite, estimate the number of cycles. Be sure to check for yielding. The diameter of the bar is 35 mm and the radius of the step down in the shaft is 3 mm. All dimensions listed below are in mm. 25 D. 20- 20 -35 D. 180 - 500 3 R. 280 -175- -50 D. - 25 D. 20 20

The rotating shaft shown in the figure is machined from AISI 1020 CD steel. It is subjected to a force of F = 6 kN. Find the minimum factor of safety for fatigue based on infinite life. If the life is not infinite, estimate the number of cycles. Be sure to check for yielding. The diameter of the bar is 35 mm and the radius of the step down in the shaft is 3 mm. All dimensions listed below are in mm. 25 D. 20- 20 -35 D. 180 - 500 3 R. 280 -175- -50 D. - 25 D. 20 20

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 rotating shaft shown in the figure is machined from AISI 1020 CD steel. It is subjected to a force of F = 6 kN. Find the
minimum factor of safety for fatigue based on infinite life. If the life is not infinite, estimate the number of cycles. Be
sure to check for yielding. The diameter of the bar is 35 mm and the radius of the step down in the shaft is 3 mm. All
dimensions listed below are in mm.
25 D.
20
- 20
-35 D.
180
-3 R.
500-
F
280-
-175-
-50 D.
-25 D.
-20
20

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