Problem 14 The backstop shown schematically in the figure is used to prevent backward rotation of the shaft. A sector is pivoted at 0,and one end of the band is attached to it and operates at a radius r2 =57 mm. The other end of the bend is attached at point a so that Oa =r125 mm. The diameter of the wheel is 210 mm, the angle of Wrap is 270°,and the width of the band is 54 mm. The torque on the wheel is 400 N.m. Assuming a coefficient of friction between the band and wheel equal to 0.2, determine the following: (a) the maximum band tension; (6) the maximum pressure between the band and wheel; and (c) whether the backstop is self-locking. Locking

Problem 14 The backstop shown schematically in the figure is used to prevent backward rotation of the shaft. A sector is pivoted at 0,and one end of the band is attached to it and operates at a radius r2 =57 mm. The other end of the bend is attached at point a so that Oa =r125 mm. The diameter of the wheel is 210 mm, the angle of Wrap is 270°,and the width of the band is 54 mm. The torque on the wheel is 400 N.m. Assuming a coefficient of friction between the band and wheel equal to 0.2, determine the following: (a) the maximum band tension; (6) the maximum pressure between the band and wheel; and (c) whether the backstop is self-locking. Locking

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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