Analytical Study On Control Of Buckling Lobe Onset For Hollow Circular Tube Under Axial Impact

Dzulhusni, Othman (2011) Analytical Study On Control Of Buckling Lobe Onset For Hollow Circular Tube Under Axial Impact. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

Nowadays, the thin-walled tubular structures are commonly used as the strengthening members of a car’s body in automotive industry. In car’s body, the strengthening members are the most critical and important parts because it can protect the car’s users from suffering the bad injury during accident by absorbing the impact energy that arises during the collision. In order to control the deformation of the solid structure due to impact energy, the solid mass is attached to that structure. The buckling lobe is expected to be occurring at the position where the solid mass is attached. This is due to the inertia forces that causes the bending deformation occur due to a great velocity change during collision at the solid mass attached area. Thus, the deformation of the solid structures can be control. This project will focus on the analytical study on control of buckling lobe onset for hollow circular tube under axial impact. The hollow cylindrical tube is used in this project and the solid mass that use the material of steel SS400 is attached to it. The aluminum A6063-T6 is used as a material of hollow cylindrical tube because it is used widely in automotive industry to replace the steel. The analysis of the deformation of the hollow cylindrical tube will be carry on by using the ABAQUS analysis software. The main focus of the analysis is to compare the deformation pattern result between the hollow cylindrical tube that attached with solid mass and without solid mass attachment. At the end of the project, the analysis result shows that the first buckling lobe onset is occur at the location where the solid mass is attached. The velocity of the impact also affect the deformation pattern of the hollow cylindrical tube where high velocity of the impact will bring large deformation to the hollow cylindrical tube compared to the small impact velocity. Finally, this project show that the deformation of the aluminum A6063-T6 hollow cylindrical tube structure can be controlled and predicted and further study need to be to this mechanism before it can be applied in real world especially in automotive and construction sectors.

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