Energy absorption characteristics of lightweight structural member by stacking conditions
2012
The recent trend in vehicle design is aimed at improving crash safety and environmental-friendliness. To solve these
issues, the needs for lighter vehicle to limit exhaust gas and improve fuel economy has been requested for
environmental-friendliness. Automobile design should be made for reduced weight once the safety of vehicle is
maintained.
In this study, composite structural members were manufactured using carbon fiber reinforced plastic (CFRP) which are
representative lightweight structural materials. Carbon fiber has been researched as alternative to metals for lightweight
vehicle and better fuel economy. CFRP is an anisotropic material which is the most widely adapted lightweight
structural member because of their inherent design flexibility and high specific strength and stiffness. Also, variation of
CFRP interface number is important to increase the energy absorption capacity.
In this study, one type of circular shaped composite tube was used, combined with reinforcing foam. The stacking
condition was selected to investigate the effect of the fiber orientation angle and interface number. The crashworthy
behavior of circular composite material tubes subjected to static axial compression under same conditions is reported.
The axial static collapse tests were carried out for each section member. The collapse modes and the energy absorption
capability of the members were analyzed.
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