"http://www.isvav.cz/projectDetail.do?rowId=GA106/03/0826"^^ . "The continuum mechanics approach to the problem of geometrically necessary dislocation boundaries"@en . "At medium and large plastic strains dislocations commonly organize themselves into a mosaic pattern of thin boundaries that surround regions almost dislocations free, Due to differing slip activity the regions on either side of a dislocation boundary arerotated with respect to one another. The aim of the project is to show that the slip inhomogeneity and the formation of rotational dislocation boundaries (geometrically necessary dislocation boundaries and incidental dislocation cell boundaries) are aconsequence of internal energy minimization under imposed loading conditions. The basic idea follows Biot's general theory of inhomogeneous deformation modes (shear and kink bands and the internal bending) treated as strain instabilities. The idea hasbeen successfully employed in our recent theory of subgrain formation."@en . "2009-01-15+01:00"^^ . . "Neuvedeno."@en . "0"^^ . . . "V\u00A0r\u00E1mci mechaniky kontinua byl vznik rozorientovan\u00FDch disloka\u010Dn\u00EDch\u00A0bun\u011Bk (subzrn) vysv\u011Btlen jako snaha vyhnout se energeticky n\u00E1ro\u010Dn\u00E9mu zpev\u0148ov\u00E1n\u00ED v\u00EDcen\u00E1sobn\u00FDm skluzem. Ve snaze udr\u017Eet zpevn\u011Bn\u00ED na co nejni\u017E\u0161\u00ED \u00FArovni, plasticky deformovan\u00FD krystal\u00A0 lok\u00E1ln"@cs . . . . . . "9"^^ . "GA106/03/0826" . . "9"^^ . . . "Probl\u00E9m geometricky nutn\u00FDch disloka\u010Dn\u00EDch hranic \u0159e\u0161en\u00FD metodami mechaniky kontinua" . . . . . . . "Within the framework of continuum mechanics, the misoriented dislocation cells (subgrains) formation has been interpreted as a result of a trend to avoid the energetically costly work hardening in multislip. In order to keep hardening at the lowest possi"@en . . . "1"^^ . . . "P\u0159i st\u0159edn\u00EDch a velk\u00FDch deformac\u00EDch dislokace obvykle vytv\u00E1\u0159ej\u00ED mozaiku tvo\u0159enou tenk\u00FDmi hranicemi, kter\u00E9 vymezuj\u00ED oblasti t\u00E9m\u011B\u0159 bez dislokac\u00ED. D\u00EDky rozd\u00EDln\u00E9 skluzov\u00E9 aktivit\u011B se oblasti na obou stran\u00E1ch hranice vz\u00E1jemn\u011B nat\u00E1\u010Dej\u00ED. Hlavn\u00EDm z\u00E1m\u011Bremprojektu je prok\u00E1zat, \u017Ee nehomogenita skluzu a tvorba rota\u010Dn\u00EDch disloka\u010Dn\u00EDch hranic (geometricky nutn\u00E9 disloka\u010Dn\u00ED hranice a hranice disloka\u010Dn\u00EDch cel) je d\u016Fsledkem minimalizace vnit\u0159n\u00ED energie krystalu vystaven\u00E9ho dan\u00FDm zat\u011B\u017Eovac\u00EDm podm\u00EDnk\u00E1m. Z\u00E1kladn\u00EDmy\u0161lenka sleduje Biotovu obecnou teorii nehomogenn\u00EDch deforma\u010Dn\u00EDch mod\u016F (smykov\u00E9 a kinkov\u00E9 p\u00E1sy, vnit\u0159n\u00ED ohyb), kter\u00E1 tyto mody pokl\u00E1d\u00E1 za deforma\u010Dn\u00ED nestabilitu. Tato my\u0161lenka byla \u00FAsp\u011B\u0161n\u011B uplatn\u011Bna v ned\u00E1vno publikovan\u00E9 teorii tvorby subzrn." . "1"^^ .