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Abstract
Many articles on bending collapse but not limited to closed-hat-section beams have been reported mainly from experimental point of view but less in simulation-based approach. Detailed investigation on critical parameters of closed-hat-section beams to examine their energy absorption capability is also less found in the literature. This paper presents the procedure for development and validation of a finite element (FE) model of a closed-hat-section beam under quasi static three-point bending using an explicit nonlinear FE technique. Developed FE models were validated through comparison with existing and present experiment results. Firstly, the existing models were rebulit via present modeling technique using informations provided in the relevant research report. Simulation results of rebuilt model were compared with existing results for verification and validation. Next, to further validate the present model, actual physical experiment replicating the FE model was set up for comparison of results. Validated models were then used in parametric studies in order to investigate the effect of some critical parameters such as plate thickness, flange and web width, and foam filler. Results show that the wall thickness, web width, and filler have direct effect on bending stiffness. Foam filling indicated significant enhancement on the crush and energy absorption of closed-hat-section beams. This study provides detail procedures and research information which will facilitate improvisation of current design as well as the design of foam filled closed-hat-section beams as energy absorbers in impact applications.
Highlights
In order to remain competitive with new alternative materials, a good understanding of the collapse behavior of closed-hat-section beams is essential for automotive structural applications
There were forces that abruptly increased to a peak of approximately 5 kN for FEA and 4 kN for the experiment result
5.4 Effect of Web and Flange Width Under three-point bending, the web section will be the first to buckle before hinge line is created
Summary
In order to remain competitive with new alternative materials, a good understanding of the collapse behavior of closed-hat-section beams is essential for automotive structural applications. This would allow enhancement of the development mathematical models to be made, which would take into account the effect of extended flange and closed-plate. This paper presents FE model development using ABAQUS with validation procedures for closed-hat-section beams subject to three-point bending. The developed explicit non-linear FE model went through two types of validation procedures which are from existing results and present physical experiments. Foam filling indicated the most significant enhancement on the crush and energy absorption of closed-hat-section beams compared to wall thickness, web, and flange width. This study provides detail procedures and research information which will facilitate improvisation of current design of closed-hat-section beams as well as the design of foam filled closed-hat-section beams as energy absorbers in impact applications
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