Сhoice of materials for producing dimensionally stable load-carrying structures

• Main Authors: V. E. Bitkin, O. G. Zhidkova, V. A. Komarov
• Format: Article
• Language: English
• Published: Samara National Research University 2018-04-01
• Series: Вестник Самарского университета: Аэрокосмическая техника, технологии и машиностроение
• Subjects: composite materials; structures; dimensional stability; carbon fiber; epoxy binder; carbon-filled plastics; design
• Online Access: https://journals.ssau.ru/vestnik/article/viewFile/6094/5983
• ISSN: 2542-0453; 2541-7533

The article deals with the problems of choosing materials for producing dimensionally stable load-carrying structures of space optical electronic complexes. Physical and mechanical properties of successfully applied and promising composite materials obtained by theoretical and experimental research are presented. A comparative analysis of properties of carbon-filled plastics is given according to the percentage of filler content in a composite matrix and the elastic modulus of carbon fiber. Experimental data related to the properties of carbon-filled plastics based on various fibers are presented. The dependence of the temperature coefficient of linear expansion (TCLE) of various carbon-filled plastics with unidirectional and quasi-isotropic structures is studied theoretically and experimentally. The stability of TCLE is shown to be approximately equal to110-6 ˚C-1 in the area with 50-60% volume filler content. The TCLEs and elastic moduli of carbon-filled plastics and optical glasses of telescope elements are compared. The task of developing a composite material with a TCLE value characteristic of titanium alloys is discussed. Recommendations for applying the analyzed composite materials in the development of dimensionally stable space structures are given.