Answered: a square thread power screw, given…

a square thread power screw, given that: F= 6.4 kN Pitch = 5 mm Major diameter = 32 mm Total raising torque = 28 N.m Then then max. torsional shear stress

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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Concept explainers

Metrology of Screw Threads

Screw threads are a series of ridges having the profile of a helix. This helix profile runs continuously along the length of a uniform solid or a hollow bar of a circular cross-section at periodic intervals. These helix ridges are also formed over a conical bar. These continuous helical ridges are termed threads.

Question

For a square thread power screw, given that:
F= 6.4 kN
Pitch = 5 mm
Major diameter = 32 mm
Total raising torque = 28 N.m
Then then max. torsional shear stress equals:

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