Abstract
The crushing behaviour of hexagonal thin-walled tube with partition plates subjected to axial compression is studied by using finite element method. It is found that, in the crushing process, the folds, which generate along the full length of the tube, come to be crushed simultaneously and the compressive load will not descend, since the compressive load produced in the central part does not descend with the folds forming on outer walls. Therefore, in order to suppress a fluctuation of the compression load in crushing of the tube and to raise its average compression load, it is an effective method to introduce corner parts, especially corner parts where three plates intersect, in the geometry of the thin-walled tube.
Highlights
It is increasingly common in designs of thin-walled tubes to incorporate interior partition plates to impart higher energy-absorbing capacity to the tubes, which are used for crushing using the impact of collisions [1,2,3]
In order to investigate the influence of partition plates on crushing behavior, the collapse mode of a regular hexagonal tube with partition plates was compared with the results obtained for a tube without partition plates
In order to elucidate the mechanisms of simultaneous collapse mode exhibited by the tube with partition plates, we investigate changes of the cross-section in radial direction and the vertical section in axial direction
Summary
It is increasingly common in designs of thin-walled tubes to incorporate interior partition plates to impart higher energy-absorbing capacity to the tubes, which are used for crushing using the impact of collisions [1,2,3]. Incorporating partition plates inside hollow members reduces the section radius of gyration, so that it appears to be a step backward in preventing Euler buckling. It is essential for the development of more effective energy-absorbing structures to explain the advantage imparted by adding internal partition plates to hollow structural members. This study conducts a systematic finite element analysis and presents investigation of the hollow regular hexagonal thin-walled tubes with internal partition plates (cf Figure 1) under axial compressive loads to investigate the role of partition plates in the crushing behavior of tubes. One of the authors showed the validation of the finite element tube model [5]
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