Stability of Pretwisted Bars with Various End Torques
Publication: Journal of Engineering Mechanics
Volume 115, Issue 4
Abstract
A torque may be classified as semitangential or quasitangential, according to the way in which it is generated. Both types of torques may cause a torsionally loaded bar to buckle at certain critical values. This paper investigates the instability of an initially straight but pretwisted bar subjected to a semi‐ or quasi‐tangential torque. The governing differential equations of a bar in the buckled state are derived using a global coordinate system, but are transformed to the local principal axes of each cross section for the convenience of solution. The characteristic equations of the boundary value problems are classified into three types, i.e., the transcendental, the periodic, and the discrete types. In the case studies, the effect of pretwist is demonstrated to be significant on the critical loads of a torsionally loaded bar.
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Information & Authors
Information
Published In
Journal of Engineering Mechanics
Volume 115 • Issue 4 • April 1989
Pages: 671 - 688
Copyright
Copyright © 1989 ASCE.
History
Published online: Apr 1, 1989
Published in print: Apr 1989
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