"1860"^^ . . . . "2008-01-01+01:00"^^ . . "0"^^ . . . "26"^^ . "1"^^ . "Modern\u00ED konstrukce slo\u017Een\u00E9 z\u00A0kompozitn\u00EDch ortotropn\u00EDch materi\u00E1l\u016F umo\u017E\u0148uj\u00ED dos\u00E1hnout vlastnost\u00ED, kter\u00FDch by nebylo mo\u017Eno doc\u00EDlit pou\u017Eit\u00EDm homogenn\u00EDch materi\u00E1l\u016F. Materi\u00E1lov\u00E9 nespojitosti vyskytuj\u00EDc\u00ED se ve slo\u017Een\u00FDch t\u011Blesech v\u0161ak vyvol\u00E1vaj\u00ED koncentraci nap\u011Bt\u00ED s\u00A0takov\u00FDm exponentem singularity, kter\u00FD\u00A0znemo\u017E\u0148uje pou\u017Eit\u00ED p\u0159\u00EDstup\u016F lomov\u00E9 mechaniky p\u016Fvodn\u011B vyvinut\u00FDch pro trhliny homogenn\u00EDch izotropn\u00EDch materi\u00E1lech.C\u00EDlem projektu je zobecnit p\u0159\u00EDstupy stanovuj\u00EDc\u00ED podm\u00EDnky iniciace trhliny pro diskontinuity modelovan\u00E9 bi-materi\u00E1lov\u00FDmi vruby s ortotropn\u00EDmi materi\u00E1lov\u00FDmi vlastnostmi.P\u0159edpokl\u00E1d\u00E1me aplikaci zobecn\u011Bn\u00FDch postup\u016F na materi\u00E1ly s\u00A0relativn\u011B k\u0159ehkou matric\u00ED a s\u00A0lomov\u00FDm chov\u00E1n\u00EDm vedouc\u00EDm k\u00A0tvorb\u011B trhlin v\u00A0matrici v\u00A0z\u00F3n\u011B takov\u00E9ho rozsahu, kter\u00FD umo\u017E\u0148ujepou\u017Eit\u00ED mechaniky poru\u0161en\u00ED kontinua, p\u0159\u00EDpadn\u011B line\u00E1rn\u00ED elastick\u00E9 lomov\u00E9 mechaniky. Pro v\u00FDpo\u010Dty bude pou\u017Eita kombinace numerick\u00FDch metod\u00A0(MKP) a analytick\u00FDch metod\u00A0(S-L formalizmus). V\u00FDsledky roz\u0161\u00ED\u0159\u00ED aplika\u010Dn\u00ED mo\u017Enosti lomov\u00E9 mechaniky a p\u0159isp\u011Bj\u00ED"@cs . "26"^^ . "2010-12-31+01:00"^^ . "bi-material wedge; orthotropic materials; stability criterion; psi-integral"@en . . . . . . "Stanoven\u00ED podm\u00EDnek iniciace poru\u0161en\u00ED v bi-materi\u00E1lov\u00FDch vrubech slo\u017Een\u00FDch ze dvou ortotropn\u00EDch materi\u00E1l\u016F"@cs . "Determination of conditions of failure initiation in bi-material wedges composed of two orthotropic materials"@en . . . "1860"^^ . "Modern constructions composed of orthotropic materials enable to achieve properties that could not be attained by means of homogeneous materials. However, material discontinuities occurring in compound structures induce general singular stress concentrations that preclude the use of the fracture mechanics approaches developed for cracks in homogeneous materials.The objective of the project is to study and extend approaches for crack initiation assessment of the discontinuities modelled as bi-material wedges with orthotropic materials properties.We assume to apply generalized procedures to materials with a relatively brittle matrix and with behaviour leading to matrix cracking of a scale that allows the use of continuum damage mechanics orpossibly linear elastic fracture mechanics. The combination of the numerical\u00A0(FEM) and\u00A0analytical methods (S-L formalism) will be used for the calculations.The results will extend the applicability of fracture mechanics and will contribute to the"@en . "1"^^ .