Recently, CR929 aircraft first full-size composite body fuselage plate technology trial success, marking the CR929 aircraft fuselage composite materials project to enter a new stage of improvement.
Advanced carbon fiber resin-based composite materials with its high strength, design, fatigue resistance, corrosion resistance and high damping performance characteristics to better meet the civilian aircraft on the safety, economy, comfort and environmental protection The demand for the development of sexual needs in the B787, A350 represented by the dual-channel aircraft, the amount of composite body structure used in more than 50%, reducing the weight of the aircraft to improve the durability of the structure and better corrosion resistance, Increased cabin pressure and humidity, increasing passenger comfort.
In order to break through the key technologies for the development of the fuselage structure of composite materials, starting from 2014, the straight section of the front fuselage of the CR929 aircraft is taken as the research object and the verification platform. China Shangfei Company organized the flying institute, the flying company, the Beijing Research Center Aviation industry complex company, strength and strength, set up a joint team to start the fuselage of composite materials. With the strong support of all parties involved, the research team fully sums up their own experience, based on the domestic foundation, give full play to advantages, to make up for shortcomings, Draw lessons from the experience and lessons learned from domestic and foreign civil aircraft main structure of composite materials, to understand the requirements of airworthiness, to determine the technical ideas of research projects, to form an integrated R & D and validation pilot program, to develop a roadmap and time for project implementation table.
In CR929 aircraft full-size composite body fuselage plate parts trial work, the research team draws on ARJ21 and C919 aircraft composite materials research results, in accordance with the law of the development of composite structures and design, analysis, manufacture and integration of the implementation process, actively and steadily promote the ' Building blocks' research and development planning, carried out material / technology research and development test and structural selection, R & D test, has identified the curing process, automated paving, molding process specifications, and explore the formation of a reasonable and feasible composite body development mechanism Over the past three years, the research team completed the development and test of components, detail pieces, 1m, 3m and 6m curved wall siding test pieces, verified the structure / process plan and design requirements, Board developed a solid foundation for the first full-size (15 × 6 m) fuselage panel composite curing process after demolding, non-destructive testing showed good results.