6. A cylindrical metal tube of mean radius r = 150 mm, length L = 7 m, and shear modulus G = 80 GPa carries the torque T = 18,000 kN-mm. Determine the smallest allowable constant wall thickness t if the shear stress is limited to 72 MPa and the angle of twist is not to exceed 2 degrees.

6. A cylindrical metal tube of mean radius r = 150 mm, length L = 7 m, and shear modulus G = 80 GPa carries the torque T = 18,000 kN-mm. Determine the smallest allowable constant wall thickness t if the shear stress is limited to 72 MPa and the angle of twist is not to exceed 2 degrees.

Mechanics of Materials (MindTap Course List)

9th Edition

ISBN:9781337093347

Author:Barry J. Goodno, James M. Gere

Publisher:Barry J. Goodno, James M. Gere

Chapter3: Torsion

Section: Chapter Questions

Problem 3.3.2P: A solid copper bar of circular cross section has length L = 1.25 m and shear modulus of elasticity G...

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Question

6. A cylindrical metal tube of mean radius r = 150 mm, length L = 7 m, and shear modulus G = 80 GPa carries the torque T = 18,000
kN-mm. Determine the smallest allowable constant wall thickness t if the shear stress is limited to 72 MPa and the angle of twist is
not to exceed 2 degrees.

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