. "barrier; corrosion-fatigue; micro-defect; interaction; fatigue crack; life time"@en . . . . . . "2008-12-31+01:00"^^ . . . "0"^^ . " corrosion-fatigue" . " micro-defect" . . . "2"^^ . "0"^^ . "2"^^ . "1"^^ . . "Mikrohlediska \u00FAnavov\u00FDch poruch v ocel\u00EDch r\u016Fzn\u00FDch pevnost\u00ED" . . "GA103/06/1382" . "Developing a model for the description of environment-attended short fatigue crack propagation. Fatigue cracks are initiated at corrosion pits being formed at inclusions, therefore the analysis embraces stress concentration influences at pits which result in the growth of fatigue cracks the rates of which are supposed to be relative to the crack tip plastic displacement. The plasticity is constrained by microstructural obstacles that are get over in a non-aggressive milieu at critical crack lengthsnothing but when the acted stress is higher than the fatigue limit. To investigate the interactions of a fatigue crack and a micro-defect such as a void, a rigid inclusion or a transformation one, the mixed boundary integral equation method is applied. Pseudo-tractions technique is used to study the influence of a transformation inclusion.\u00A0 An element incorporating the mixed-mode stress intensity factors is employed to describe the singularity at a moving crack tip. The analysis of a crack issuing from"@en . " interaction" . . "Applying a dislocation based Navarro-de los Rios model to represent the crack and its associated plastic zone, the crack growth process is characterized by the interaction of dislocations, or local damage, and microstructural barriers. Some modifications"@en . "Podle Navarr-de los Riosova modelu je proces r\u016Fstu trhlin charakterizov\u00E1n spolup\u016Fsoben\u00EDm dislokac\u00ED asociovan\u00FDch k mikrotrhlin\u00E1m, nebo lok\u00E1ln\u00EDm po\u0161kozen\u00EDm a mikrostruktur\u00E1ln\u00EDmi p\u0159ek\u00E1\u017Ekami (okraji zrn, sra\u017Eeninami, rozpt\u00FDlen\u00FDmi \u010D\u00E1sticemi, f\u00E1zemi rozhran\u00ED a"@cs . "Micro-interpretation of fatigue defects in steels of various strengths"@en . "2008-04-25+02:00"^^ . "barrier" . "Model m\u00E1 popsat \u0161\u00ED\u0159en\u00ED kr\u00E1tk\u00FDch \u00FAnavov\u00FDch trhlin ovlivn\u011Bn\u00E9 prost\u0159ed\u00EDm. Trhliny vznikaj\u00ED v\u00A0kor\u00F3zn\u00EDch d\u016Flc\u00EDch vytvo\u0159en\u00FDch v\u00A0inkluz\u00EDch, proto anal\u00FDza zahrnuje vlivy koncentrace nap\u011Bt\u00ED v\u00A0d\u016Flc\u00EDch, rezultuj\u00EDc\u00ED do r\u016Fstu \u00FAnavov\u00FDch trhlin, o jeho\u017E rychlosti se p\u0159edpokl\u00E1d\u00E1, \u017Ee je v\u00A0relaci k\u00A0plasticitn\u00EDmu posunut\u00ED \u0161pi\u010Dky trhliny. Plasticitu omezuj\u00ED mikrostruktur\u00E1ln\u00ED p\u0159ek\u00E1\u017Eky, je\u017E jsou p\u0159ekon\u00E1ny v\u00A0neagresivn\u00EDm prost\u0159ed\u00ED p\u0159i dosa\u017Een\u00ED kritick\u00FDch d\u00E9lek trhlin pouze v\u00A0p\u0159\u00EDpad\u011B, pokud p\u016Fsob\u00EDc\u00ED nap\u011Bt\u00ED je vy\u0161\u0161\u00ED ne\u017E mez \u00FAnavy. Pro anal\u00FDzu spolup\u016Fsoben\u00ED \u00FAnavov\u00E9 trhliny a mikrodefekt\u016F, jako jsou nap\u0159. dutiny, tuh\u00E9 a transforma\u010Dn\u00ED inkluze, je aplikov\u00E1na kombinovan\u00E1 metoda hrani\u010Dn\u00EDch integr\u00E1ln\u00EDch rovnic. K\u00A0rozboru vlivu transforma\u010Dn\u00ED inkluze je pou\u017Eita pseudo-trak\u010Dn\u00ED procedura. K\u00A0popisu singularit v\u00A0okol\u00ED pohybuj\u00EDc\u00EDho se vrcholu trhliny se u\u017E\u00EDv\u00E1 prvek zahrnuj\u00EDc\u00ED faktory intenzity nap\u011Bt\u00ED sm\u00ED\u0161en\u00E9ho m\u00F3du. Rovn\u011B\u017E je vy\u0161et\u0159ov\u00E1na deska kone\u010Dn\u00FDch rozm\u011Br\u016F, oslaben\u00E1 trhlinou, je\u017E vych\u00E1z\u00ED z\u00A0kruhov\u00E9ho otvoru. Je\u0161t\u011B jsou" . . " fatigue crack" . . . . . "2009-10-22+02:00"^^ . "http://www.isvav.cz/projectDetail.do?rowId=GA103/06/1382"^^ . . "2006-01-01+01:00"^^ .