Design, development, structure and parts within the structure efficiency and high security. To reduce the risk of accidents caused by the insertion or collision. Causing injuries and deaths of the user vehicle. Therefore, designers have experiment to find parts with the ability to reduce the damage from the bump or collisions of structures called "absorb energy" to be used in the structure. The factors that affect the ability to absorb the energy of the energy absorption, including shape, material, thickness, size and behavior of damage. And so on.Objectives of this study were to determine the ability to absorb the energy of the thin wall pipe which is aluminum tube filling foam polyurethane under torque (Torsion). By using the simulation program and the actual workpiece abacus experiment to compare. The cross-sectional shapes of the pipe used to experiment, including shape face Tat square cross-sectional shapes hexagon shape face Tat octagon, and cross-sectional shapes circle. The density of the foam was used for the experiment is 50kg / m, ¬ 3 75kg / m3 100kg / m3,,Analysis showed that under torque The pipe cross-sectional shapes circle energy absorption highest, followed by pipe shape face Tat eight square shape, hexagonal cross-section Pipe shape and face Tat square absorption energy minimum. From the analysis of the density foam used to fill in the pipe. 50kg / m, ¬ 3 75kg / m3 100kg / m3,, The density of the foam making aluminum tube absorption energy is the most high 100kg / m3 and found ว่าความหนาแน่น foam will make the higher adsorption energy increases.
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