Mechanical Response of Variable and Constant-Stiffness Cylindrical Shells for Launcher Structures

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Abstract

The ability to steer the carbon fibre tape, varying the tow angle can open new designs of cylindrical shells – the main structural component of the space launcher vehicles. This research presents experimental and numerical investigation of two carbon-epoxy cylindrical shells – a cylinder with conventional layup made of unidirectional prepreg and a variable-stiffness cylinder manufactured by applying advanced fibre placement technology. The shells were tested in compression until buckling, measuring load-shortening and capturing the buckling shape by digital image correlation systems. For the purpose of modelling the variable-stiffness cylinder, a simplified stiffness approximation approach was applied. The obtained load-shortening curves and buckling shapes demonstrated good correlation with non-linear numerical models. The results of the investigation contributes to the understanding the phenomenon of buckling of variable-stiffness cylindrical shells, and the influence of initial geometric imperfections and thickness variations.
Original languageEnglish
Title of host publicationECSSMET 2018: 15th European Conference on Spacecraft Structures
Subtitle of host publication2018, Noordwijk, Netherlands
Number of pages5
Publication statusPublished - 2018
EventECSSMET 2018: 15th European Conference on Spacecraft Structures - ESTEC/ESA, Noordwijk, Netherlands
Duration: 28 May 20181 Jun 2018

Conference

ConferenceECSSMET 2018: 15th European Conference on Spacecraft Structures
Abbreviated titleECSSMET 2018
CountryNetherlands
CityNoordwijk
Period28/05/181/06/18

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    Labans, E., & Bisagni, C. (2018). Mechanical Response of Variable and Constant-Stiffness Cylindrical Shells for Launcher Structures. In ECSSMET 2018: 15th European Conference on Spacecraft Structures: 2018, Noordwijk, Netherlands