A countershaft carrying two V-belt pulleys is shown in the figure. 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 tension on the loose side at B is 15 percent of the tension on the tight side. 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 the bearings act as simple supports. c. Draw shear-force and bending-moment diagrams for the shaft. If needed, make one set for the horizontal plane and another set for the vertical plane. d. At the point of maximum bending moment, determine the bending stress and the torsional shear stress. e. At the point of maximum bending moment, determine the principal stresses and the maximum shear stress.

A countershaft carrying two V-belt pulleys is shown in the figure. 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 tension on the loose side at B is 15 percent of the tension on the tight side. 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 the bearings act as simple supports. c. Draw shear-force and bending-moment diagrams for the shaft. If needed, make one set for the horizontal plane and another set for the vertical plane. d. At the point of maximum bending moment, determine the bending stress and the torsional shear stress. e. At the point of maximum bending moment, determine the principal stresses and the maximum shear stress.

International Edition---engineering Mechanics: Statics, 4th Edition

4th Edition

ISBN:9781305501607

Author:Andrew Pytel And Jaan Kiusalaas

Publisher:Andrew Pytel And Jaan Kiusalaas

Chapter7: Dry Friction

Section: Chapter Questions

Problem 7.70P: Solve Sample Problem 7.16 if the contact pressure under the polisher varies parabolically from p0 at...

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Solve Sample Problem 7.16 if the contact pressure under the polisher varies parabolically from p0 at r=0 to zero at r=R; that is, p=p0(1r2/R2).
Requlred Information A countershaft carrying two V-belt pulleys Is shown In the figure. Pulley A recelves power from a motor through a belt with the belt tensions shown. The power Is transmitted through the shaft and dellivered to the belt on pulley B. Assume the belt tenslon on the loose side at B Is 15 percent of the tension on the tight side. Glven B(dg) = 400 mm, TA = 575 N, and TỊA2) = 3835.25 N. 300 450 400 TIA T(A2Y `150 250 dia. B(da) 20 dia. B At the point of maximum bending moment, determine the bending stress and the torslonal shear stress. The bending stress at the point of maximum bending moment is [.09515 MPа. The torslonal shear stress at the point of maximum bending moment is 259.442 MPа.
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A countershaft carrying two V-belt pulleys is shown in the figure. 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 tension on the loose side at B is 15 percent of the tension on the tight side.
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