. . . . . "2010-12-31+01:00"^^ . "The project is focused on clarification of phenomena associated with wave propagation in bodies made of anisotropic laminates and eventually also metals. The effort will be devoted at first to elucidation of physical properties of Rayleigh-type waves propagating in common anisotropic materials having orthotropic, transversely isotropic and cubic symmetry. In this case it is assumed that an internal material structure has an impact on macromechanical behaviour only. Simultaneously the attention will be paid to the failure and damage of strips (with stress concentrators) made of single and multi-layer materials. Also the research will focus on the nonstationary behaviour of thin laminated plates due to low-velocity impact. The problems will be studied using analytical, numerical and experimental approaches. Available criteria, such as Puck's or the LaRC02 criterion, for the prediction of the failure will be used. The criteria will be prospectively modified, if necessary."@en . . "41"^^ . "41"^^ . "http://www.isvav.cz/projectDetail.do?rowId=IAA200760611"^^ . "Stress waves propagation; anisotropy; laminates; material degradation"@en . "IAA200760611" . . "Wave propagation and degradation processes in anisotropic laminates"@en . "Bylo zji\u0161t\u011Bno, \u017Ee rychlost Rayleighov\u00FDch vln v tenk\u00E9m ortotropn\u00EDm prost\u0159ed\u00ED v\u00FDznamn\u011B z\u00E1vis\u00ED na sm\u011Brech materi\u00E1lov\u00FDch os. Byl vytvo\u0159en nov\u00FD materi\u00E1lov\u00FD neline\u00E1rn\u00ED model, pomoc\u00ED kter\u00E9ho lze popsat chov\u00E1n\u00ED materi\u00E1lu s r\u016Fznou orientac\u00ED vl\u00E1ken."@cs . "2006-01-01+01:00"^^ . " laminates" . . " anisotropy" . . . . "\u0160\u00ED\u0159en\u00ED vln a degrada\u010Dn\u00ED procesy v anizotropn\u00EDch lamin\u00E1tech" . "Stress waves propagation" . "2010-03-09+01:00"^^ . . "Projekt je zam\u011B\u0159en na vysv\u011Btlen\u00ED jev\u016F spojen\u00FDch se \u0161\u00ED\u0159en\u00EDm vln v anizotropn\u00EDch lamin\u00E1tech a eventu\u00E1ln\u011B t\u00E9\u017E v kovov\u00FDch struktur\u00E1ch. \u00DAsil\u00ED bude sm\u011B\u0159ovat k objasn\u011Bn\u00ED fyzik\u00E1ln\u00EDch vlastnost\u00ED vln Rayleighova typu, kter\u00E9 se \u0161\u00ED\u0159\u00ED v b\u011B\u017En\u011B se vyskytuj\u00EDc\u00EDch anizotropn\u00EDch struktur\u00E1ch, maj\u00EDc\u00EDch ortotropn\u00ED, p\u0159\u00ED\u010Dn\u011B izotropn\u00ED a kubickou materi\u00E1lovou symetrii. V t\u00E9to etap\u011B se bude p\u0159edpokl\u00E1dat, \u017Ee vnit\u0159n\u00ED materi\u00E1lov\u00E1 struktura bude m\u00EDt dopad pouze na makromechanick\u00E9 vlastnosti prost\u0159ed\u00ED. Sou\u010Dasn\u011B bude pozornost v\u011Bnov\u00E1na vzniku poru\u0161en\u00ED a n\u00E1sledn\u00E9mu po\u0161kozen\u00ED p\u00E1sov\u00FDch vzork\u016F (s koncentr\u00E1tory nap\u011Bt\u00ED) vytvo\u0159en\u00FDch z jedn\u00E9 \u010Di n\u011Bkolika vrstev materi\u00E1lu. V\u00FDzkum se rovn\u011B\u017E zam\u011B\u0159\u00ED na vy\u0161et\u0159ov\u00E1n\u00ED nestacion\u00E1rn\u00ED napjatosti lamin\u00E1tov\u00FDch desek zat\u00ED\u017Een\u00FDch n\u00EDzkorychlostn\u00EDm r\u00E1zem. P\u0159i \u0159e\u0161en\u00ED se budou kombinovat analytick\u00E9, numerick\u00E9 a experiment\u00E1ln\u00ED metody. Pro predikci poru\u0161en\u00ED bude u\u017Eito Puckovo a LaRC02 kriterium. Uk\u00E1\u017Ee-li se to nezbytn\u00E9, budou tato kriteria modifikov\u00E1na." . . . . . "2013-06-28+02:00"^^ . . "1"^^ . . "2"^^ . "It has been found that Rayleigh wave velocity in thin orthotropic medium depends significantly on the directions of material axes. A new nonlinear material model was created to describe the behavior of materials with different fiber orientation."@en . "0"^^ .