Double-sided conical crush box design and numerical calculation

Keywords: Crash box, Degree of taper, Energy absorption, Finite element method, double-sided conical crush box Traffic accidents are increasing as a result of the increasing number of vehicles and population in recent years. Active and passive safety systems are used in the vehicles we use today to reduce traffic accidents and prevent casualties. One of the Passive Security Systems is the crush box (crashworthiness). it absorbs the energy generated during the crash by plastic deformation on itself. Absorbed energy reduces loss of life and property. Today, crush boxes are continuing to work to absorb more energy. Generally, thin-walled structures with high energy absorbability, light weight and easy to manufacture are used. In this study, thin-walled conical tubes, the axial crushing behavior and energy effects of changing the degree of taper on their ability to absorb the effects were investigated by the finite element method.Finite element model is supported by experimental studies. The crushing performances of the conical tubes according to their average crushing force,total energy absorption and specific energy absorption values were compared. In conical crush boxes, it has been observed that the crush box with 10 ° conical degree is the one with the best energy absorption ability. A double-sided conical crush box design with different thicknesses of 10 ° cone and flat tube is designed. The double-sided conical crush box was examined by finite element method.