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Modélisation des assemblages de ballons pressurisés stratosphériques

Selva, Pierre and Dalverny, Olivier and Mistou, Sébastien and Karama, Moussa and Alexis, Joël and Deramecourt, Arnaud Modélisation des assemblages de ballons pressurisés stratosphériques. (2008) Mécanique & Industries, 9 (2). 159-165. ISSN 1296-2139

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Official URL: http://dx.doi.org/10.1051/meca:2008021

Abstract

Long duration super-pressure balloon design and manufacturing is a great challenge for the CNES in scientific ballooning. They are made of 50 µm thick polymer films (PET/PA/PET) which are joined with 23 µm thick adhesive PET bands. To date, during flight missions, a real problem appears: some balloons explode prematurely. This is why this study deals with the mechanical behaviour of the stratospheric pressurized balloons and particularly with the assembly of the constitutive materials. Firstly, a nanoindentation test campaign makes it possible to identify the elastic properties of the materials directly in the assembly at two different temperatures. Then, we simulate a nominal assembly in two approaches: 2D and 3D. More particularly, we present an example concerning a defect of the junction in 3D approach using the submodeling technique. Finally, we use the factorial design method at two levels and finite-element models to study the influence of the various conception parameters on the mechanical behaviour of the assembly.

Item Type:Article
Additional Information:Thanks to EDP Sciences editor. The definitive version is available at http://www.cambridge.org. The original PDF of the article can be found at Mécanique & Industries website : http://dx.doi.org/10.1051/meca:2008021
HAL Id:hal-00796649
Audience (journal):National peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National d'Études Spatiales - CNES (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
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Deposited By: Joël ALEXIS
Deposited On:26 Feb 2013 11:23

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