Q1: The arrangement of a transmission brake is shown in the figure. The arms are pivoted at O and, when force is applied at the end of the hand lever, the screw AB will rotate. The left-and right- hand threads working in nuts on the ends of the arms will move the arms together and thus apply the brake actuating force equally. A B 12cm The drum is 17.75cm diameter, and the angle subtended by cach block is 90°. the friction material lining width is 4cm. Assuming a coefficient of friction for the braking surfaces that is equal to 0.30 Determine the force required by the screw AB to set the brake torque on the drum equal to 200 N-m. 17 75cm 12cm TorqueLeft= TorqueRight= 97.40 N.m 6 35cm 6 35cm 102.60 N.m

Q1: The arrangement of a transmission brake is shown in the figure. The arms are pivoted at O and, when force is applied at the end of the hand lever, the screw AB will rotate. The left-and right- hand threads working in nuts on the ends of the arms will move the arms together and thus apply the brake actuating force equally. A B 12cm The drum is 17.75cm diameter, and the angle subtended by cach block is 90°. the friction material lining width is 4cm. Assuming a coefficient of friction for the braking surfaces that is equal to 0.30 Determine the force required by the screw AB to set the brake torque on the drum equal to 200 N-m. 17 75cm 12cm TorqueLeft= TorqueRight= 97.40 N.m 6 35cm 6 35cm 102.60 N.m

Mechanics of Materials (MindTap Course List)

9th Edition

ISBN:9781337093347

Author:Barry J. Goodno, James M. Gere

Publisher:Barry J. Goodno, James M. Gere

Chapter11: Columns

Section: Chapter Questions

Problem 11.2.4P: Repeat Problem 11.2-3 assuming that R= 10 kN · m/rad and L = 2 m.

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Concept explainers

Slope and Deflection

The slope in a deflected beam is described as an angle in radians made by the tangent of the section with the original axis of the beam. The deflection at any point on the axis of the beam is defined as the lateral displacement of the point before and after loading.

Question

Q1: The arrangement of a transmission brake is shown in
the figure. The arms are pivoted at O and, when force is
applied at the end of the hand lever, the screw AB will rotate.
The left-and right- hand threads working in nuts on the ends
of the arms will move the arms together and thus apply the
brake actuating force equally.
A
B
12cm
The drum is 17.75cm diameter, and the angle subtended by
each block is 90°. the friction material lining width is 4cm.
Assuming a coefficient of friction for the braking surfaces that
is equal to 0.30 Determine the force required by the screw
AB to set the brake torque on the drum equal to 200 N-m.
17 75cm
12cm
46 35cm
Torqueleft=
TorqueRight=
97.40 N.m
6 35cm
102.60 N.m

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