Extension of the Bending-Gradient theory to thick plates buckling: application to Cross Laminated Timber walls / Olivier Perret in MATERIAUX & TECHNIQUES, Vol. 104, N° 4 (2016)  

[article]  inMATERIAUX & TECHNIQUES > Vol. 104, N° 4 (2016) . - 9 p. Titre : Extension of the Bending-Gradient theory to thick plates buckling: application to Cross Laminated Timber walls Type de document : texte imprimé Auteurs : Olivier Perret, Auteur ; Arthur Lebée, Auteur ; Cyril Douthe, Auteur ; Karam Sab, Auteur Année de publication : 2016 Article en page(s) : 9 p. Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bois Cisaillement (mécanique) Flambage (mécanique) Modèles techniques Plaques (ingénierie) Rigidité (mécanique) Stratifiés -- Propriétés mécaniques Index. décimale : 620.1 Mécanique de l'ingénieur (mécanique appliquée) et matériaux Résumé : In this paper, the resolution of the linear buckling problem is presented using the Bending-Gradient theory which is an extension of the Reissner’s plate theory to the case of heterogeneous plates. Reference results are taken from a 3D numerical analysis using finite-elements and applied to Cross Laminated Timber walls which are thick and highly anisotropic laminates. It is observed from reference results that critical buckling load and failure load are of the same order of magnitude. Buckling effects have then to be taken into account in the design of Cross Laminated Timber walls. It is then shown that for varying plate geometries, the Bending-Gradient theory predicts precisely the critical load of Cross Laminated Timber walls contrary to classical Kirchhoff and first order shear deformation theories. Moreover, it is demonstrated that the suggested projection of the Bending-Gradient on a Reissner’s model gives very accurate results. This model could then be used in a more extensive study on the buckling of Cross Laminated Timber walls with initial geometrical imperfections and on the effects of the long term behavior of wood. Note de contenu : - LINEAR BUCKLING OF PLASTES WITH THE BENDING-GRADIENT THEORY : Notations - The bending-gradient theory - Linear buckling analysis - 3D REFERENCE MODEL FOR CROSS LAMINATED TIMBER : The 3D linear buckling problem - 3D buckling of cross laminated timber walls - COMPARISON BETWEEN NUMERICAL RESULTS AND PLATE MODELS : Results for a square plate - Variation of the plate aspect ratio Référence de l'article : 410 DOI : http://dx.doi.org/10.1051/mattech/2016021 En ligne : http://www.mattech-journal.org/fr/articles/mattech/pdf/2016/04/mt160014.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27593 [article]

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