2018 №12 (03) DOI of Article
2018 №12 (05)

Automatic Welding 2018 #12
Avtomaticheskaya Svarka (Automatic Welding), #11-12, 2018, с. 46-57

Thin-walled welded transformable-volume structures of space purpose

L.M. Lobanov, V.S. Volkov

E.O. Paton Electric Welding Institute of the NAS of Ukraine. 11 Kazimir Malevich Str., 03150, Kyiv, Ukraine. E-mail: office@paton.kiev.ua

The rational methods of construction of metal transformable shells with the aim of creation of the space-purpose structures were investigated. The mathematical modeling of the neutral shell surface of the transformable-volume structure (TVS) was performed, the result of which was used to set the reference surface at the kinematic modeling of its stress-strain states during a compact folding. The parameters of the process of welding thin shells of stainless steel were determined, guaranteeing the maximum approaching of physico-mechanical properties of welded joints to similar properties of the base metal, thus providing their vacuum density. The methods of modification of surface of thin metal shells of stainless steel, which allow improving the safety margin of TVS of space purpose without changing their mass and compactness were developed. The possibility was experimentally confirmed and the conditions of stability of complete reverse transformation of a multisectional conical-type TVS were formulated. 7 Ref., 12 Fig.
Keywords: unfolding structures, thin shells, microplasma welding, microstructure and weld metal, surface engineering

Received: 22.03.2018
Published: 06.11.2018

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