On January 5, 2021, the China Standardization Association issued and implemented the group standard of "Carbon Fiber Composite Fenders for Passenger Cars". This move will promote the quality specification and upgrade of domestic passenger car fenders.
Fenders are exterior trim parts that cover the wheels of a car body. It is named after the shape and position of the parts resemble bird wings. When the car is running, the fender can prevent damage to the wheel hub and the bottom of the compartment by the sand, mud, etc. carried by the wheel during the driving process. It is one of the more typical outer coverings on the car, with high quality requirements and forming It is difficult. Generally, materials with better formability, better strength and better anti-corrosion performance are selected. The thickness of the material should be as thin as possible on the premise of meeting the dent resistance and rigidity to reduce the weight of the whole vehicle.
Carbon fiber composite material is a new high-performance material with excellent specific strength, specific modulus, corrosion resistance, fatigue resistance and other advantages.
Compared with the traditional sheet metal fender, the carbon fiber reinforced plastic car fender:
1) The weight can be reduced by more than 45%, the lightweight effect is obvious, and the advantages of energy saving and emission reduction are obvious;
2) Stable physical and chemical properties, not easy to oxidize and rust, strong corrosion resistance and long life;
3) Good dimensional stability, improving the matching accuracy of accessories related to the fender;
4) Higher damping coefficient and fatigue strength limit, strong shock absorption and fatigue resistance;
5) Special texture pattern display. As China’s car ownership continues to grow, and affected by factors such as the rejuvenation of major consumer groups and individualized needs, the use of carbon fiber composite fenders and other automotive boutique parts that reflect the trend of high-end, quality, and customization has caused more and more Cognition and attention of many people.
At present, China's carbon fiber composite fender manufacturing companies are mainly small and medium-sized companies, which are mainly engaged in the manufacture of high-end automobile refitting parts, and cannot mass production. Compared with the development of foreign carbon fiber composite automotive parts, domestic development is relatively backward. Moreover, carbon fiber composite fenders for passenger cars are still blank in national standards, industry standards or local standards. Manufacturers mostly formulate their own corporate standards and organize production based on customer requirements. The industry lacks standard guidance. And the standard, good and bad products vary. In order to effectively guide the healthy and sustainable development of the industry, and at the same time enable users to have a unified standard for reference and comparison in the process of selecting and using products, promote product quality and technological upgrading, and fully protect the rights and interests of consumers.
Accordingly, China’s leading manufacturer of carbon fiber composite automotive lightweight components, GDYT Carbon Fiber Technology Group, and Guangzhou Automobile Group Co., Ltd. Automotive Engineering Research Institute and other units jointly drafted the standard. The drafting team composed of experts from the above-mentioned units and capable technical backbones conducted a thorough investigation and research on the current market status, production technology level, application fields, existing problems to be solved and related technical standards of carbon fiber composite fender products. Some technical indicators have been repeatedly tested in relevant companies to obtain data, and seminars have been held many times to conduct in-depth discussions on relevant technical issues and indicators to reach agreement.
The group standard of "Carbon Fiber Composite Fenders for Passenger Cars" is based on guaranteeing and improving the quality and technical level of car fenders. It provides various quality standards for passenger car fenders made of carbon fiber reinforced epoxy resin matrix composites. Regulations were made in the link, including normative references, terms and definitions, technical requirements, test methods, inspection rules, signs, packaging, transportation and storage. Technical requirements include general requirements, size requirements, appearance quality, functional requirements, etc. The expert group reviewed that the "Carbon Fiber Composite Fenders for Passenger Cars" unified the group standards and standardized the technical quality requirements for carbon fiber composite fenders for passenger cars. The technical quality indicators are advanced and applicable, and can be used for domestic passenger cars. The upgrade of car fenders provides technical support and meets market needs, and promotes the promotion and application of high-performance new materials and the realization of passenger car components fender technical quality upgrades.