AbstractThe problem that the space membranes are easily torn open is the main focus in this paper, and a bionic strengthening-ribs structure is proposed for a space membrane based on interdisciplinary strengths, such as topology optimization, composite materials, and rapid prototyping. The optimization method and modeling method of membranes with bionic strengthening-ribs was studied. The PEEK and SCF/PEEK composite material which are applied to the space environment are chosen, and FDM technology is used. Through topology optimization, bionic strengthening-ribs with good tensile and tear capacities were obtained. Cracked membranes, cracked membranes with PEEK strengthening-ribs and SCF/PEEK strengthening-ribs were tested and test data were obtained. An extension situation and tension fracture were compared for three cases. The experimental results showed that membranes with the bionic strengthening-ribs structure have better mechanical properties, and the strength of the membranes with PEEK and SCF/PEEK strengthening-ribs were raised, respectively, up to 266.9% and 185.9%. The strengthening-ribs structure greatly improves the capacity to halt membrane crack-growth, which has an important significance to avoid membrane tear, and to ensure the spacecraft orbital lifetime.
HighlightsOptimal strengthening-rib structure is obtained by topology optimization method.Optimized strengthening-ribs are printed on membrane by FDM method.Optimized strengthening-ribs improve tear resistance of a cracked membrane.PEEK ribs improve the tensile strength, but SCF/PEEK ribs reduce the total stress.Tensile capacity of a cracked film separately increased by 266.9% and 185.9%.
Research into topology optimization and the FDM method for a space cracked membrane
Acta Astronautica ; 136 ; 443-449
2017-03-30
7 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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