At present, the world's most advanced civil aircraft, such as the Boeing 787, Airbus A350 in the application of composite materials are more than 50% of the body material. From the mechanical point of view, the composite materials is the existence of the problem, the aircraft flew for some time, have to carry out defect inspection. But the composite materials is some of the fiber, from a lot of layers together, is a very complex structure, which appeared some small defects is difficult to be found.
"China Civil Aviation News", China Civil Aviation Network reporter Cheng Jie reported: the magic of nature is always an endless gift to the wisdom of human wisdom, as all the hives have a unified construction angle and mode of the same - is the hexagonal hole , Adjacent to the common hole share a wax and silk made of the wall, the bottom of the hole by the three completely the same composition of the diamond. This not only saves building materials very much, but also has excellent structural stability. In 2005, the world's first full-composite aircraft used honeycomb-like carbon fiber laminates. This new structure under the premise of ensuring strength, stiffness and heat resistance, but the aircraft than the commonly used aluminum, steel and titanium alloy material weight reduced by half. The same time as the above-
It is because of these advantages, the composite materials has become the "new favorite" of aviation materials. Its structure on the passenger aircraft growing weight, and now has begun to be widely used in civil aviation manufacturing. Some of the advanced aircraft composite materials weight has exceeded the metal material, accounting for more than 50% of its total weight, which has become a future civil aircraft in the material selection of a trend. The same time as the above-
In order to meet the aircraft in the flight of a series of demanding requirements, aircraft manufacturers of the use of composite materials is very cautious, and many of the answers to the key questions require a profound understanding of scientists and theoretical interpretation. Duan Huiling is such an expert. As a researcher at the Department of Mechanics and Engineering Science, Peking University Institute of Technology, she has studied many years in the field of composite materials research and has obtained many international research results. The same time as the above-
Due to outstanding scientific and technological achievements, Duan Huiling won the 11th "China Young Women Scientist Award" co-sponsored by the All-China Women's Federation, China Science and Technology Association, China National Committee of UNESCO and L'Oreal China. In the awards scene, the reporter on the composite materials in the field of aviation applications related issues interview Duan Huiling. The same time as the above-
Reporter: In the field of aviation composite materials research, its research objectives are mainly what? The same time as the above-
Duan Huiling: We mainly study the strength and stiffness of composite materials. Especially for the aircraft manufacturing industry, one of the important factors is to minimize the weight. Therefore, our study is to ensure that the composite materials in the case of light weight, to ensure its greater strength and stiffness, and to prevent cracks. The same time as the above-
These Composite Materials are sandwich structures, like the natural honeycomb, in fact the middle of the "heart" is empty, so the weight will be light. However, this structure will be crushed by force. In order to avoid this situation, we have to design, so that it has a greater stiffness. As a result, engineers usually add coatings to the composite. What kind of coating material is used, the thickness of the coating is determined, and what effect the coating will have on the properties of the material, which directly determines the stiffness and strength of the material. The same time as the above-
Reporter: At present, the world's most advanced civilian aircraft, such as the Boeing 787, Airbus A350 in the application of composite materials are more than 50% of the body material. But the manufacturers in the application of composite materials is still relatively cautious, on the current technology, composite materials in the field of civil aircraft manufacturing applications to what extent? The same time as the above-
Duan Huiling: composite materials have been able to partially replace the aircraft on the metal material, but can not all replace. Such as some large force structure or core components, the future of the aircraft engine is certainly used or steel.