Journal ArticleDOI
On the effect of shear when bending crashworthy thin-walled steel tubes
TLDR
In this paper, the effect of shear on collapse characteristics during the bending of cylindrical tubes was investigated both experimentally and theoretically, and the theoretical and experimental results were found to be in good agreement.Abstract:
Crashworthiness analysis has become an integral part of the automotive design cycle. Since oblique impacts and vehicle rollover are common vehicle accidents, further studies investigating frame collapse due to bending loading are needed. The main focus of this paper is to study both experimentally and theoretically the effect of shear on collapse characteristics during the bending of cylindrical tubes. Theoretical and experimental results were found to be in good agreement.read more
Citations
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Journal ArticleDOI
Bending of cylindrical steel tubes: numerical modelling
TL;DR: In this paper, the authors apply the explicit FE code LS-DYNA to the simulation of the crash behaviour of thin-walled cylindrical steel tubes subjected to three-point bending test in different positions and directions of the imposed load.
Journal ArticleDOI
Bending of cylindrical steel tubes: numerical simulation using Grid computing
A.G. Mamalis,Theodora Varvarigou,Antonios Litke,Dimitrios E. Manolakos,M.B. Ioannidis,P.K. Kostazos,Vassiliki Andronikou,Efstathios Karanastasis +7 more
TL;DR: In this paper, the authors apply the explicit FE code LS-DYNA through a Grid computing platform in order to simulate the crash behaviour of thin-walled cylindrical steel tubes subjected to three-point bending test in various cases of the position and direction of the imposed load.
Journal Article
An Analysis of Collapse Mechanism of Thin- Walled Circular Tubes Subjected to Bending
TL;DR: In this paper, a closed-form solution of thin-walled circular tubes subjected to bending was developed to predict the collapse behavior of members, which is an alternative for early step of design.
Journal ArticleDOI
The Bending of Fibre-Reinforced Composite Thin-Walled Tubular Components: Numerical Modelling
TL;DR: In this article, the authors describe the implementation of the Implicit finite element code MARC in the simulation of the crush behaviour of cylindrical thin-walled composite tubes under bending.
Journal ArticleDOI
Plastic Collapse When a Rotating Pipe Impacts on a Target Pipe
TL;DR: In this paper, a modified plastic collapse analysis adapting upper bound technique based on an existing deformation mechanism model was considered to predict the plastic energy dissipation during the deformation of circular section pipes, and the results illustrate the influence of kinetic energy and its impact position on the energy absorption characteristics of the target pipe.
References
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Journal ArticleDOI
Bending collapse of rectangular and square section tubes
TL;DR: The bending collapse behavior of rectangular and square section tubes is studied theoretically and experimentally in this article, where a limit analysis technique is employed and a set of formulae relating the hinge moment and associated angle of rotation is derived.
Journal ArticleDOI
The quasi-static crumpling of thin-walled circular cylinders and frusta under axial compression
A.G Mamalis,W Johnson +1 more
TL;DR: In this paper, thin-walled circular cylinders and truncated circular cones of aluminium alloy were subjected to axial static loading and their initial axial length and the outside diameter of cylinders and frusta were kept constant whilst their wall thickness was varied.
Journal ArticleDOI
Extensible plastic collapse of thin-wall frusta as energy absorbers
TL;DR: In this paper, the crumpling of thin-walled frusta, under axial compression, in the ‘concertina’ mode is studied, where the energy expended in bending at the plastic hinges and in stretching the metal between the hinges is minimized for the total decrease in height due to collapse.
Crashworthiness of vehicles
W Johnson,A G Mamalis +1 more
TL;DR: In this article, the authors reviewed information concerning the mechanics of vehicular impact, the plastic deformation which follows and the consequences for vehicle occupants, and how the destructive consequences can be reduced or minimized when a collision occurs.
Journal ArticleDOI
On the inextensional axial collapse of thin PVC conical shells
Athanasios G. Mamalis,Dimitrios E. Manolakos,G.L. Viegelahn,Nikolaos M. Vaxevanidis,Wendy Johnson +4 more
TL;DR: Inextensional collapse mechanisms for axial crumpling of thin-walled circular cones and frusta (truncated circular cones) are presented in this paper, where shortening of the (thin) shell height is achieved by folding in a non-symmetric diamond mode about stationary circumferential and inclined plastic hinges; collapse proceeds progressively from the narrower end of the conical shell during the passage of a travelling hinge.