Development Possibilities of Dimensionally Stable Composite Structures with Optimal Characteristics for the Elements of Space Structures

摘要

The relevance of the research topic is determined by the need to create composite elements for space technology that meet the requirements of dimensional stability, and at the same time have high values of stiffness, strength and other characteristics. Such elements can be used in the construction of space antennas, power elements for mounting high-precision equipment in space telescopes and cameras. The article considers the formulation of optimization problems for various classes of dimensionally stable structures including a two-layer structure [±Φ_1/±Φ2] and a three-layer structure [0/90°/±Φ]. For these structures, analytical expressions are obtained that relate their variable parameters (reinforcement angles and relative layer thicknesses) to satisfy the condition of dimensional stability. It is shown that for structures that have several variable parameters during optimization, there are many solutions to solve the problem of uniaxial dimensional stability, which makes it possible to set problems for them to study the ultimate properties for stiffness, strength, and other requirements. A numerical study of various structures from modem high modulus carbon plastics was carried out, as a result of which the boundary of ultimate properties in the space of requirements for dimensionally stable composite structures were constructed. The results of the work give conclusions about a possible point of achieving optimal combinations of characteristics of dimensionally stable composite elements.