Torsion of thin-walled three-connected box rod
The main feature of the deformation of thin-walled bars - the appearance of sectional warping under the influence of the torque and the associated normal stresses. When torsion rod box section with an open (non-closed ) profile, if the end sections are axially movable (free or pure torsion), the cutting edge considerably diverge; when the development of axial strain constrained (constrained torsion), warping (the output section of the points of the original cross-sectional plane) is reduced. It should be noted that the axial strain increases the rigidity and strength of the thin-wall rod. For thin-walled with closed profile rods warping is substantially less, and for them, as a rule, can use the usual theory of torsion and bending bars. In this work the analysis of stress-strain state of a thin-walled torsion box triconnected rod bulkhead. The formulas containing two parameters x and n, are determined by the location and thickness (stiffness) of the bulkhead.