GATE ME 2014 Set 2 — Question 45
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Machine Design → Machine Elements → Brakes, Clutches & Springs
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Question
A disc clutch with a single friction surface has coefficient of friction equal to 0.3. The maximum pressure which can be imposed on the friction material is 1.5 MPa. The outer diameter of the clutch plate is 200 mm and its internal diameter is 100 mm. Assuming uniform wear theory for the clutch plate, the maximum torque (in ) that can be transmitted is _______
Correct answer
529 to 532
Solution
Given data:
Coefficient of friction,
Maximum pressure,
Outer diameter,
Internal diameter, According to the uniform wear theory:
(constant)
The maximum pressure occurs at the inner radius :
The axial force () required is given by:
The mean radius () for uniform wear is:
The maximum torque () transmitted is:
Thus, the torque is approximately , which falls within the range of 529 to 532.
Coefficient of friction,
Maximum pressure,
Outer diameter,
Internal diameter, According to the uniform wear theory:
(constant)
The maximum pressure occurs at the inner radius :
The axial force () required is given by:
The mean radius () for uniform wear is:
The maximum torque () transmitted is:
Thus, the torque is approximately , which falls within the range of 529 to 532.
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