Development trend and problems of carbon fiber com

2022-08-22
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The development trend and problems of carbon fiber composites for automobiles

carbon fiber composites are widely used in today's high-performance automobile body. At present, there is no replaceable material that can have high strength, high hardness, impact resistance, light weight, corrosion resistance and long service life; The application of automatic processing technology reduces the paving cost, improves the stacking quality and improves the production efficiency

I. Development Trend of automotive composites

carbon fiber composites are widely used in today's high-performance automotive body. At present, there is no replaceable material that can have high strength, high hardness, impact resistance, light weight, corrosion resistance and long service life; The application of automatic processing technology reduces the paving cost, improves the stacking quality and improves the production efficiency; Design and manufacture combined parts - reduce manufacturing costs; Research and development of thermoplastics, aimed at reducing material costs and improving recyclability; The development of low temperature curing/non autoclave curing process aims to reduce the dependence on autoclave process and reduce manufacturing costs

II. Some problems in development

the successful application of carbon fiber reinforced epoxy resin composites in large commercial aircraft, high-performance vehicles and F1 racing car main load-bearing structural parts shows that composites can completely replace metals and be used in automobile body structures

however, due to the high cost of current materials and process equipment, considering the current process chain and product chain of automobile production, as well as the recyclability and reuse of materials, and considering the cost and benefits, the conditions for mass production are not yet available, resulting in great limitations in the application of carbon fiber reinforced epoxy resin in heavy-duty fat loaded composite materials in automobile structural parts, This makes high-strength steel plate and aluminum alloy still the mainstream materials of automobile bearing structures at present

as a new material completely different from metal materials, the design of composite automotive parts involves many aspects, such as structural design, ply design and strength design. It is inseparable from the accumulation of a large number of calculations and empirical data. In order to realize the large-scale production of composite auto parts, it is necessary to formulate corresponding standards and specifications, including material inspection and testing standards and production process specifications

in the actual process of composite material design, it is a general trend to start making specific degradable materials at the early stage of structural design according to the advantages and disadvantages of materials and specific structural shape, performance and cost requirements. It is an important premise to realize high-level composite material structural design to analyze and plan the problems encountered and treatment methods as carefully as possible

therefore, the composite body structure is a very complex system engineering. At present, many foreign vehicle manufacturers and cooperative factories have built a complete composite process system and design system. In contrast, domestic automobile enterprises are still in a blank in this regard. With the increasing application of composite materials in the automotive industry, it has become a top priority for domestic automobile manufacturers to establish professional R & D teams and formulate corresponding material specifications and process specifications

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