Design of Longitudinal Members To Vehicle: Enhances The Energy Absorption of Thin Walled Structure Under Dynamic Load

Abstract

he present paper describes the behaviour of the thin wall rectangular tube cross- sections, subjected to dynamic compression load. We examine the reaction of the tube of various thicknesses and diameters, subjected to direct and oblique loading. The study investigates the behaviour of the rectangular tube, with ellipse, circular and square shape triggers, and with various weight of hollow foam. The choice of the best design of tube parameter is based on the multi criteria decision making (MCDM) method. The examined parameters are the crush force efficiency, the peak force, and the energy absorption in case of direct and oblique loading. The rectangular tube is made of mild steel A36. Under direct load, with the usage of hollow aluminium foam, we can obtain 50% improvement f energy absorption and 84.6% of CFE. The enhancement under oblique load is 15.7% and 40.4% respectively. The aim of using thinner tube and hollow aluminium foam is to keep the final design the lowest possible weight, to improve the CFE and the energy absorber capacities in order to attain higher passenger safety