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Approximation of the critical buckling factor for composite panels

Bettebghor, Dimitri and Bartoli, Nathalie Approximation of the critical buckling factor for composite panels. (2012) Structural and Multidisciplinary Optimization. 01-24. ISSN 1615-147X

(Document in English)

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Official URL: http://dx.doi.org/10.1007/s00158-012-0784-6


This article is concerned with the approximation of the critical buckling factor for thin composite plates. A new method to improve the approximation of this critical factor is applied based on its behavior with respect to lamination parameters and loading conditions. This method allows accurate approximation of the critical buckling factor for non-orthotropic laminates under complex combined loadings (including shear loading). The influence of the stacking sequence and loading conditions is extensively studied as well as properties of the critical buckling factor behavior (e.g concavity over tensor D or out-of-plane lamination parameters). Moreover, the critical buckling factor is numerically shown to be piecewise linear for orthotropic laminates under combined loading whenever shear remains low and it is also shown to be piecewise continuous in the general case. Based on the numerically observed behavior, a new scheme for the approximation is applied that separates each buckling mode and builds linear, polynomial or rational regressions for each mode. Results of this approach and applications to structural optimization are presented.

Item Type:Article
Additional Information:Thanks to Springer editor. The definitive version is available at http://www.springerlink.com/
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE-SUPAERO (FRANCE)
French research institutions > Office National d'Etudes et Recherches Aérospatiales - ONERA (FRANCE)
Laboratory name:
Département Aéroélasticité et Dynamique des Structures - DADS (Chatillon, France) - MSAE
Département Traitement de l'Information et Modélisation - DTIM (Toulouse, France) - Modélisation et Ingénierie des Systèmes - MOIS - Modèles Mathématiques et Simulation Numérique - M2SN
Deposited On:03 Jul 2012 09:19

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