Answered: 3.9 A square steel rod 20 mm on a side…

3.9 A square steel rod 20 mm on a side develops a tor- sional shear stress of 50 MPa when subjected to torque. Calculate the torque and the angle of twist over a length of 1.8 m. G = 80 GPa.

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 3.8.8P: A solid circulai' aluminum bar AB is fixed at both ends and loaded by a uniformly distributed torque...

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Concept explainers

Torsion

In mechanical engineering, torque, torsion, and twisting moment are three of the most important concepts which have different meanings. Torque is the consequence of a moment of a force that produces an angular acceleration in a body or induces rotational kinetic energy in a body. For instance, in an automobile, the power transmission shaft is a body that is always under rotation due to the external torque acting on it, this torque is created by the engine.

Question

3.9 A square steel rod 20 mm on a side develops a tor-
sional shear stress of 50 MPa when subjected to torque. Calculate the
torque and the angle of twist over a length of 1.8 m. G = 80 GPa.

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