Lesson 11. Analysis of Clutch – uniform wear, uniform pressure

Analysis of Torque Transmission

In the figure, the frictional surface has an outer radius, r0, inner radius ri.      

Assume an elemental surface area of thickness dr at a radius of r from the centre. If p is the pressure exerted while putting the two discs A and B together.

f11.1.jpg

ro – radius of outer end of the clutch facing

ri – radius of inner edge of clutch facing

dr – thickness of the elemental element of clutch facing at a distance of r from the centre

Total axial force, df = p.dA

df = p.2πr.dr

F = 2π

The torque that can be transmitted

e1.jpg

Case I : If pressure is constant i.e. p=k

e2.jpg

Case II: if wear is constant i.e. p.r = constant

e3.jpg

Numerical

Last modified: Monday, 3 March 2014, 5:04 AM