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In order to find the maximum bending moment on the arms, it is assumed as a

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in Machine Dynamics by (34.3k points)
In order to find the maximum bending moment on the arms, it is assumed as a

(a) simply supported beam carrying a uniformly distributed load over the arm

(b) fixed at both ends (i.e. at the hub and at the free end of the rim) and carrying a uniformly distributed load over the arm.

(c) cantilever beam fixed at the hub and carrying a concentrated load at the free end of the rim

(d) none of the mentioned

I got this question in exam.

My question is taken from Fluctuation of Energy topic in division Turning Moment Diagrams and Flywheel of Machine Dynamics

1 Answer

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by (38.6k points)
Right choice is (c) cantilever beam fixed at the hub and carrying a concentrated load at the free end of the rim

To explain: Due to the torque transmitted from the rim to the shaft or from the shaft to the rim, the arms will be subjected to bending, because they are required to carry the full torque load. In order to find out the maximum bending moment on the arms, it may be assumed as a centilever beam fixed at the hub and carrying a concentrated load at the free end of the rim.

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