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International Journal of Automotive Technology > Volume 14(4); 2013 > Article
International Journal of Automotive Technology 2013;14(4): 605-610.
APPLICATION OF WARM FORMING ALUMINUM ALLOY PARTS FOR AUTOMOTIVE BODY BASED ON IMPACT
H. T. SUN
Ludong University
ABSTRACT
Aluminum alloys are important technological materials for the application on lightweight design and development of vehicle body. The research works for characterizing warm forming behavior of aluminum alloys have generally reported. However, there were few researches focused on the flow behavior of warm forming aluminum alloy parts for the energy absorbing performance during crash. The tensile stress-strain response for warm forming AA5182 specimens tested under the strain rates of 0.0015 s-1, 0.015 s-1, 0.15 s-1 and 1.5 s-1 are presented in this paper. The data were fit to the Johnson-Cook constitutive model for the simulation of frontal impact. The energy absorbing performance of warm forming AA5182 parts were analyzed. The results show the higher flow stresses and lower fractured strain of warm forming aluminum alloy parts with the strain rate increasing. The flow stresses of warm forming aluminum alloy parts are insensitive to strain rate, while the fractured strain and elongation are sensitive to strain rate. The intrusion displacement of the warm forming aluminum alloy parts is appropriate for the satisfaction of vehicle body design avoiding the excessive deformation for the injury of passenger or the failure of frontal door opening. The feasibility of warm forming aluminum alloy parts is verified with the analysis of energy absorbing performance, stiffness and modal of vehicle body.
Key Words: Aluminum alloy 5182, Warm forming, Flow behavior, Automotive body parts, Frontal impact
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