1. School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China;
2. Nanjing Iveco Automobile Co. Ltd.,Nanjing 210028,China
In order to improve the crashworthiness of the vehicles under oblique collision,a novel foam-filled oval tube was proposed. The specific energy absorption (SEA) and peak crushing force (PCF) were adopted as crashworthiness indices. Then a finite element simulation was used to analyze the effects of structural parameters,including the oval radial rate,wall thickness and foam density on the energy-absorbing characteristics of the tube. The results show that:with the reduction of radial rate,the PCF increases under small angle impact and SEA increases under large angle impact. Besides,the SEA and PCF are approximately linear with the wall thickness. When the density of foamed aluminum is 0.153 g/cm3,the composite SEA of the foam filled tube reaches minimum,and the PCF increases with the increase of foam density. It is advantageous to improve the automobiles crashworthiness and safety performance by reasonably designing the parameters of foam-filled oval tubes.
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