关键词: 车身轻量化；材料；数学模型；大型板壳结构

Abstract: Body lightweight is one of the most important research contents in the automotive industry. It is an effective method to improve the fuel utilization rate and reduce the exhaust emissions. At present, it is an important way to use lightweight materials as the body materials. Compared with the single material body material, using multi material body can really make the right materials used in the right parts, and make the best use of the effect. In this paper, the car body as the research object, with the appropriate materials applied to the appropriate parts of the design concept, combined with the body structure, performance, quality, cost and other aspects to analyze and study the lightweight design method of multi material body.

Key words: Body lightweight; Material; Mathematical model; Large shell structure