The large-deflection pure bending properties of a square thin-walled tube

Experimental investigation of plastic collapse of aluminium extrusions in biaxial bending

“…Starting from the examination of the techniques for experimental investigation used in previous works found in the literature [1,7,8,17], a proper test rig was designed and built at the Safety and Reliability Laboratory of the second Engineering Faculty of the Politecnico di Torino, in order to perform quasi static experimental bending tests (uniaxial and biaxial) on thin walled beams (Figs. 2 and 3).…”

“…With some of the reference test apparatus [7,8], the inverse mechanism cannot develop because of the imposed constraints. One of the few works in which an inverse mechanism was systematically observed is the very recent one that deals with the collapse in conditions of oblique load [18,19].…”

“…The mechanisms of bending collapse have been widely analysed in the scientific literature [1][2][3][4][5][6][7][8] for cases in which the bending moment acts about one of the two principal axes of inertia of the section and therefore the collapse develops in a pure plane modality. The first experimental and analytical study of planar bending collapse was conducted by Kecman in 1979 [1,2].…”

A study on large deflection of thin-walled tubes under pure bending

“…Although this machine was designed for pure bending, in reality it imposed some tensile forces at large rotation angles, and in order to avoid this phenomenon, modifications were made to Cimpoeru and Muny [I71 test rig. This current paper, will again modify the original pure bending machine in [16] through to that in [17] in order to further increase the rotation angle so that large sections could be tested at higher loads.…”

Bending hinge characteristic of thin-walled square tubes

“…Experiments about pure bending of square thin-walled tubes were also conducted by Cimpoeru and Murray [11] by using a unique bending machine that was capable of applying a pure bending moment to large deflections without significant shear or tensile forces. The momentrotation curves were measured up to and beyond bending collapse.…”