Answered: What force F must be exerted on the…

What force F must be exerted on the brake arm shown to hold the drum against rotation if P = 1000KN and the coefficient of belt friction is 0.30. Figure, F ¡A 800mm 450 B 200mm 100mm 200mm P=1000KN

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

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SELF-CHECK EXERCISE PROBLEM 06.
What force F must be exerted on the brake arm shown to hold the drum against
rotation if P = 1000KN and the coefficient of belt friction is 0.30.
Figure,
F
¡A
800mm
450
B
200mm
100mm
200mm
CI
P=1000KN

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The width of the simple band brake shown in the figure is 30 mm. The coefficient of friction between the brake and the drum surface is 0.20. Determine the braking torque and thickness of the band if the tensile stress is not to exceed 65 N/mm2.
Braking torque applied?
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