"Sandwich construction elements, i.e. elements formed by two skins and core, excel in high ratio of bending stiffness to weight of construction. This complex is designed in order to transmit transverse forces by core and bending load by skins. It is possible to model these constructions by finite elements method (FEM) with use of layered shell elements, by combination of shell and solid elements or by only solid elements. As a test body was chosen sandwich beam composed by combination skin - core - skin for comparative analysis. Comparison of particular model method was carried out for case of three-point bending. Model stiffness was confronted by beam deflection. Further there were confronted variation of strain and stress along thickness. Beam deflections were compared with experimental available data. As optimal model is appeared modelling of skins by shells and core by solid elements." . "Novotn\u00FD, Ctirad" . "composite, sandwich, stiffness determination, FEM"@en . "978-80-87012-06-2" . . "\u0160paniel, Miroslav" . . . "Svratka" . "452514" . . . "2"^^ . . "Praha" . . . . "Stiffness Determination of Sandwich Constructions" . "RIV/68407700:21220/07:02138590!RIV08-MPO-21220___" . "2"^^ . "P(FI-IM2/113)" . "\u00DAstav termomechaniky AV \u010CR" . "Stiffness Determination of Sandwich Constructions"@en . "Sandwich construction elements, i.e. elements formed by two skins and core, excel in high ratio of bending stiffness to weight of construction. This complex is designed in order to transmit transverse forces by core and bending load by skins. It is possible to model these constructions by finite elements method (FEM) with use of layered shell elements, by combination of shell and solid elements or by only solid elements. As a test body was chosen sandwich beam composed by combination skin - core - skin for comparative analysis. Comparison of particular model method was carried out for case of three-point bending. Model stiffness was confronted by beam deflection. Further there were confronted variation of strain and stress along thickness. Beam deflections were compared with experimental available data. As optimal model is appeared modelling of skins by shells and core by solid elements."@en . "Stiffness Determination of Sandwich Constructions"@en . "Stiffness Determination of Sandwich Constructions" . "Ur\u010Dov\u00E1n\u00ED tuhosti sendvi\u010Dov\u00FDch konstrukc\u00ED"@cs . "203;204" . "2"^^ . . "Engineering Mechanics 2007" . . . "2007-05-14+02:00"^^ . . . "Ur\u010Dov\u00E1n\u00ED tuhosti sendvi\u010Dov\u00FDch konstrukc\u00ED"@cs . . "Sendvi\u010Dov\u00E9 konstruk\u010Dn\u00ED prvky, tj. prvky tvo\u0159en\u00E9 dv\u011Bma potahy a j\u00E1drem, vynikaj\u00ED vysok\u00FDm pom\u011Brem ohybov\u00E9 tuhosti ku hmotnosti konstrukce. Celek je navr\u017Een tak, aby j\u00E1dro p\u0159en\u00E1\u0161elo smykov\u00E9 s\u00EDly a potahy ohybov\u00E1 zat\u00ED\u017Een\u00ED. Sendvi\u010Dov\u00E9 konstrukce je mo\u017Eno modelovat metodou kone\u010Dn\u00FDch prvk\u016F (MKP) s vyu\u017Eit\u00EDm vrstven\u00FDch sko\u0159epinov\u00FDch prvk\u016F, kombinac\u00ED sko\u0159epinov\u00FDch a objemov\u00FDch prvk\u016F nebo pouze objemov\u00FDmi prvky. Pro srovn\u00E1vac\u00ED anal\u00FDzu byl jako zku\u0161ebn\u00ED t\u011Bleso vybr\u00E1n sendvi\u010Dov\u00FD nosn\u00EDk tvo\u0159en\u00FD kombinac\u00ED potah-j\u00E1dro-potah. Srovn\u00E1n\u00ED jednotliv\u00FDch metod modelov\u00E1n\u00ED bylo provedeno pro p\u0159\u00EDpad t\u0159\u00EDbodov\u00E9ho ohybu. Tuhost model\u016F byla srovn\u00E1na prost\u0159ednictv\u00EDm pr\u016Fhyb\u016F. D\u00E1le byly srovn\u00E1v\u00E1ny pr\u016Fb\u011Bhy deformace a nap\u011Bt\u00ED po tlou\u0161\u0165ce nosn\u00EDku. Pr\u016Fhyby nosn\u00EDk\u016F byly porovn\u00E1v\u00E1ny s experiment\u00E1ln\u00EDmi daty. Jako nejvhodn\u011Bj\u0161\u00ED zp\u016Fsob modelov\u00E1n\u00ED se jev\u00ED modelov\u00E1n\u00ED potahu sko\u0159epinov\u00FDmi a j\u00E1dra objemov\u00FDmi prvky."@cs . . "21220" . "RIV/68407700:21220/07:02138590" . . . "[D00A8F9DB41F]" .