Section A6.3 example 1

SECTION A6.3 EXAMPLE1


A 1/2 HP motor operating at 1000 RPM rotates a 30 in long, 0.75 in diameter, 0.035 in thick aluminum alloy torque tube which drives the gear mechanism for operating a wing flap. Determine


EQUATIONS USED


SOLUTION

First, based on the maximum power and RPM the torque applied to the tube is


Note that this external torque is reacted by an internal torque of the same magnitude at every section along the length of the tube.

Based on the above value of torque the maximum shear stress in the tube is

The resulting angular deflection (angle of twist) is determined to be


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