Compared with the traditional composite materials has many advantages of high strength, light weight, high specific modulus, good fatigue resistance and good damping performance etc.. Each part of composite material has synergistic effect on performance, superior performance can not be compared with the single material. Therefore, in the automobile industry, composite material is widely used in the body, the lamp cover, front and rear fender, bumper, plate spring, a seat frame and drive shaft and other components design and manufacturing.

The design of composite materials in the automobile industry should pay attention to 3 principles: 1) high specific strength and high specific stiffness; 2) materials and adapt to the environment; 3) price. In addition, in the design of the body, some experience and methods, such as: in the area for the application of carbon fiber composite material; in the region compared to the toughness and stiffness requirements of high use plywood composite; in the region of complex geometries can use laminate.

The performance of the composite material is suitable for the lightweight of the vehicle body, and the fuel consumption is reduced. A traditional auto body material is based on thin plate in a single state, can not adapt to the people's pursuit of the requirements of high speed and light weight, in order to reduce the quality, improve the drag coefficient and reduce fuel consumption, many car manufacturers are actively research and the use of new materials in order to achieve the above requirements. Car weight reduction of 1L, 50kg fuel travel distance can be increased by 2Km; if the weight is reduced by 10%, fuel economy can be improved by about 5.5%. Many types of composites are in Autobody lightweight process has been stage to display, and the vehicle's lightweight process Daxian novices. Automobile lightweight purpose is energy saving and reducing emission pollution. At the same time, environmental protection has become the essential condition of the strategy of sustainable development, and the development trend of composite materials are heading for extended use period and the direction of development of renewable.

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