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Type of torsion of thin walled section ? 


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Torsion of thin-walled sections can be classified into different types based on the specific characteristics of the structures. One type is uniform torsion, where the warping displacement and angle of twist rate remain constant in all cross-sections . Another type is non-uniform torsion, which occurs when the beam is assigned with boundary conditions, resulting in varying angle of twist rate and axial displacement along the axis . Additionally, there is torsion of closed thin-walled (CTW) beams, which considers the warping deformation and restrained shear stresses on the cross section . Furthermore, shear buckling stresses in torsion of thin-walled square beams can be determined theoretically, taking into account the finite length of the beam . Lastly, an approximate analytical method has been developed for the torsion analysis of thin- to moderately thick-walled functionally graded open-section members with uniform thickness .

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The paper discusses the shear buckling stress in torsion of thin-walled square cross-section beams. It does not specifically mention the type of torsion.
The paper discusses the torsion of closed thin-walled (CTW) beams subjected to restrained torsion.
The paper presents a novel theory of torsion of thin-walled beams with influence of shear. The type of torsion discussed in the paper is torsion of thin-walled beams.
The paper discusses both uniform and non-uniform torsion in thin-walled structures.

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