Study of Pure Torsion in Open Thin Walled Sections using Finite Element Analysis
Keywords:Pure Torsion, Warping, Open Thin Walled Section, ABAQUS, Finite Element Method.
Generally, Open Thin Walled (OTW) cross sections are susceptible to torsional instability, due to their low
torsional rigidity. Several analytical methods have been proposed to calculate the torsional deformation
(warping) along the direction perpendicular to the cross section of such OTW sections when subjected to
torsion. In this paper, we have analysed the warping in the OTW sections to validate that in case of pure torsion
of such bars having free ends, the warping is uniform throughout the whole length of the bar and any line
parallel to centroidal axis can be taken as axis of rotation. The finite element analysis using ABAQUS has been
done to analyse the warping of such sections when subjected to pure torsion. This paper also represents the
comparative study of warping distribution in OTW sections using the theoretical approach and Finite Element
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