Energy Absorption by Square, Circular, Pentagon and Hexagonal Steel Tubes Under Impact Loading for Automotive Crush Box Applications


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Abstract


To identify the highest energy-absorbing geometrical section of thin-walled steel tubes is the objective of this study. Energy absorption in square, circular, pentagonal and hexagonal steel tubes were evaluated by finite element analysis. With the impactor colliding with one side of the tube while its other side kept rigid, a three-dimensional simulation was accomplished. The study showed that energy absorption in the pentagonal cross-section was higher than in other three cross-sections. The experimental results of load displacement with square steel tube showed good agreement with finite element method. The study suggests that a pentagonal structure of crush box would avoid higher impact and hence minimize damage to the automotive structure.
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Keywords


Finite Element Method; Crush Box; Energy Absorption; Automotive Structure

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