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What is meant by warping of non circular shafts?
For non-circular shafts under torsion, the plane cross-sections perpendicular to the shaft axis do not remain plane after twisting, and deformation takes place in the axial direction which is called warping.
What is torsional warping?
In addition to shear stresses, some members carry torque by axial stresses. This is called warping torsion. This happens when the cross-section wants to warp, i.e., displace axially, but is prevented from doing so during twisting of the beam.
What is warping in structures?
The warping deformation is an unusual distortion which characterizes thin-walled open section beams. This phenomenon, usually neglected for most of structural elements, appears in presence of transverse loads, in particular if they cause torsional effects.
What is warping of section?
In section warping, warp yarns are organized into yarn bands (sections), each having the same warp density as for the weaver’s beam. The warp yarns are wound onto the drum band by band until all yarns are wound onto the drum. Then, the yarn sheet is transferred from the drum onto the weaver’s beams.
How is a non-circular cross section under torsion?
A solid, non-circular cross-section does not remain plane under torsion; instead, the section warps. Abaqus uses St. Venant warping theory to calculate a single component of shear strain caused by the warping at each section point in the cross-section.
Which is part of a plane warps under torsion?
The warping calculation assumes that the warping displacements are small. The following cross-sections behave differently under torsion: solid cross-sections; closed, thin-walled cross-sections; and open, thin-walled cross-sections. A solid, non-circular cross-section does not remain plane under torsion; instead, the section warps.
What kind of shear strain is caused by warping?
Abaqus uses St. Venant warping theory to calculate a single component of shear strain caused by the warping at each section point in the cross-section. The warping in such solid cross-sections is considered unconstrained and creates negligible axial stresses.
How does warping affect a solid cross section?
The warping in such solid cross-sections is considered unconstrained and creates negligible axial stresses. (Warping constraints would affect the solution only in the immediate vicinity of the constrained end.)