Documents disponibles écrits par cet auteur

Wrinkling and edge buckling in orthotropic sandwich beams / Wooseok Ji in Journal of engineering mechanics, Vol. 134 n°6 (Juin 2008) 

Public ISBD [article]  in Journal of engineering mechanics > Vol. 134 n°6 (Juin 2008) . - pp.455–461. Titre : Wrinkling and edge buckling in orthotropic sandwich beams Type de document : texte imprimé Auteurs : Wooseok Ji, Auteur ; Anthony M. Waas, Auteur Année de publication : 2008 Article en page(s) : pp.455–461. Note générale : Mécanique appliquée Langues : Anglais (eng) Mots-clés : Sandwich  structures  Axial  compression  Elastic  analysis  Edge  effects  Finite  element  method  Buckling  Beams  Orthotropism Résumé : A sandwich beam buckling problem is studied here using two-dimensional elasticity to model the beam constituents. The global and local instability of such a beam with orthotropic constituents under various boundary conditions are investigated. The face sheet and the core are assumed to be linear elastic orthotropic continua. General buckling deformation modes of the sandwich beam subjected to uniaxial compressive loading are considered. The appropriate incremental stress and conjugate incremental finite-strain measure for the instability problem of the sandwich beam, and the corresponding constitutive model are addressed. It is shown that a sandwich beam having a core with a negligible stiffness compared to the face sheets is prone to fail by edge buckling. The present analysis is compared with several previous analytical studies and corresponding experimental results. Finite-element analyses are carried out for comparison against the theoretical predictions. The formulation used in the finite-element code is discussed in relation to the formulation adopted in the theoretical derivation. ISSN : 0733-9399 En ligne : http://ascelibrary.org/action/showAbstract?page=455&volume=134&issue=6&journalCo [...] [article] Wrinkling and edge buckling in orthotropic sandwich beams [texte imprimé] / Wooseok Ji, Auteur ; Anthony M. Waas, Auteur . - 2008 . - pp.455–461. Mécanique appliquée Langues : Anglais (eng) in Journal of engineering mechanics > Vol. 134 n°6 (Juin 2008) . - pp.455–461. Mots-clés : Sandwich  structures  Axial  compression  Elastic  analysis  Edge  effects  Finite  element  method  Buckling  Beams  Orthotropism Résumé : A sandwich beam buckling problem is studied here using two-dimensional elasticity to model the beam constituents. The global and local instability of such a beam with orthotropic constituents under various boundary conditions are investigated. The face sheet and the core are assumed to be linear elastic orthotropic continua. General buckling deformation modes of the sandwich beam subjected to uniaxial compressive loading are considered. The appropriate incremental stress and conjugate incremental finite-strain measure for the instability problem of the sandwich beam, and the corresponding constitutive model are addressed. It is shown that a sandwich beam having a core with a negligible stiffness compared to the face sheets is prone to fail by edge buckling. The present analysis is compared with several previous analytical studies and corresponding experimental results. Finite-element analyses are carried out for comparison against the theoretical predictions. The formulation used in the finite-element code is discussed in relation to the formulation adopted in the theoretical derivation. ISSN : 0733-9399 En ligne : http://ascelibrary.org/action/showAbstract?page=455&volume=134&issue=6&journalCo [...]