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-->//(Brakes) Example 12.9
-->//Face width of the friction lining w (mm)
-->w = 50
w =
50.
-->//Maximum intensity of normal pressure pmax (N/mm2)
-->pmax = 1
pmax =
1.
-->//Coefficient of friction mu
-->mu = 0.3
mu =
0.3
-->//Radius of the drum R (mm)
-->R = 250
R =
250.
-->//All angles are taken from the same reference
-->//Angles of the shoe theta1 and theta2
-->theta1 = 15
theta1 =
15.
-->theta2 = 75
theta2 =
75.
-->//Maximum normal pressure occurs at angle fi (deg)
-->if (theta2 > 90)
--> fi = 90
-->else
--> fi = theta2
fi =
75.
-->end
-->//Distance of the force from the horizontal centerline d1 (mm)
-->d1 = 200
d1 =
200.
-->//The distance of the pivot from the axis of the brake drum h (mm)
-->h= 200
h =
200.
-->//Distance of the pivot from the vertical centerline d2 (mm)
-->d2 = 50
d2 =
50.
Actuating force(P) = 5025.457606 N
Torque absorbing capacity of the brake with 4 shoes(Mt) = 2181614.276244 N-mm
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