A countershaft carrying two V-belt pulleys is shown in the figure below. Pulley A receives power...
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A countershaft carrying two V-belt pulleys is shown in the figure below. Pulley A receives power from a motor through a belt with the belt tensions shown. The power is transmitted through the shaft and delivered to the belt on pulley B. Assume the belt tenson on the loose side at B is 15% of the tension on the tight side. Dimensions are in inches. a. Determine the tensions in the belt on pulley B, assuming the shaft is running at a constant speed. b. Find the magnitudes of the bearing reaction forces, assuming they act as simple supports. c. Draw the shear-force and bending moment diagrams for the shaft. d. At the point of the maximum bending moment, determine the bending and torsional shear stress e. At the point of the maximum bending moment, also determine the principle stresses and maximum shear stress. T 250-mm dia. 230 mm T 280 mm 30-mm dia. 400-mm dia. 1800 N 300 mm 270 N x A countershaft carrying two V-belt pulleys is shown in the figure below. Pulley A receives power from a motor through a belt with the belt tensions shown. The power is transmitted through the shaft and delivered to the belt on pulley B. Assume the belt tenson on the loose side at B is 15% of the tension on the tight side. Dimensions are in inches. a. Determine the tensions in the belt on pulley B, assuming the shaft is running at a constant speed. b. Find the magnitudes of the bearing reaction forces, assuming they act as simple supports. c. Draw the shear-force and bending moment diagrams for the shaft. d. At the point of the maximum bending moment, determine the bending and torsional shear stress e. At the point of the maximum bending moment, also determine the principle stresses and maximum shear stress. T 250-mm dia. 230 mm T 280 mm 30-mm dia. 400-mm dia. 1800 N 300 mm 270 N x
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