Buckling of cylindrical sandwich shells with metal foam cores

Citation
Jw. Hutchinson et My. He, Buckling of cylindrical sandwich shells with metal foam cores, INT J SOL S, 37(46-47), 2000, pp. 6777-6794
Citations number
14
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Mechanical Engineering
Journal title
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
ISSN journal
0020-7683 → ACNP
Volume
37
Issue
46-47
Year of publication
2000
Pages
6777 - 6794
Database
ISI
SICI code
0020-7683(200011)37:46-47<6777:BOCSSW>2.0.ZU;2-T
Abstract
Buckling of cylindrical sandwich shells subject to axial compression is add ressed for shells having foamed metal cores. Optimal face sheet thickness, core thickness and core density are obtained which minimize the weight of a geometrically perfect shell with a specified load carrying capacity. Const raints imposed by wrinkling and yielding of the face sheets and yielding of the core are all considered. The range of the structural load index is ide ntified for which the sandwich shells have a competitive weight advantage o ver stringer stiffened shells. In most of this range, the minimum weight de sign has elastic buckling simultaneous with face sheet yielding. Imperfecti on sensitivity of the shells is assessed with special emphasis on the role of plasticity in degrading strength, especially in light of the coincidence of elastic buckling and face sheet yielding in the optimally designed perf ect shell. The purpose is to examine the interaction between imperfections and plastic yielding to see if buckling load knockdowns should be larger th an those expected for elastic shells. (C) 2000 Elsevier Science Ltd. All ri ghts reserved.