"Mechanism of fatigue damage in natural composites"@en . . "The project contributes to the understanding of the mechanisms of the early fatigue damage in natural composites like duplex steels and nickel superalloys. New results on the initation and short crack growth allow to interpret the Coffin-Manson law."@en . . . . . . . "22"^^ . . "22"^^ . "C\u00EDlem navrhovan\u00E9ho projektu je v n\u00E1vaznosti na p\u0159edchoz\u00ED projekt studium cyklick\u00E9 plasticity duplexn\u00EDch ocel\u00ED z\u00EDskat nov\u00E9 poznatky o mechanismech \u00FAnavov\u00E9ho po\u0161kozen\u00ED, zejm\u00E9na v jeho po\u010D\u00E1te\u010Dn\u00EDch stadi\u00EDch, kdy po\u0161kozen\u00ED je obt\u00ED\u017En\u011B detekovateln\u00E9, av\u0161ak p\u0159itom ur\u010Duje \u00FAnavovou \u017Eivotnost. V austenitick\u00E9 oceli, feritick\u00E9 oceli i v duplexn\u00ED austeniticko-feritick\u00E9 oceli bude sledov\u00E1na lokalizace cyklick\u00E9 plastick\u00E9 deformace, vytv\u00E1\u0159en\u00ED povrchov\u00E9ho reli\u00E9fu, iniciace p\u0159irozen\u00FDch trhlin a r\u016Fst kr\u00E1tk\u00FDch \u00FAnavov\u00FDch trhlin. Experiment\u00E1ln\u00ED poznatky budou konfrontov\u00E1ny s dosud p\u0159edlo\u017Een\u00FDmi modely s c\u00EDlem ov\u011B\u0159it a up\u0159esnit tyto modely a z\u00EDskat poznatky vedouc\u00ED k c\u00EDlev\u011Bdom\u00E9mu ovlivn\u011Bn\u00ED struktury t\u011Bchto materi\u00E1l\u016F za \u00FA\u010Delem dosa\u017Een\u00ED vysok\u00E9 \u00FAnavov\u00E9 odolnosti. Budou identifikov\u00E1na rozhoduj\u00EDc\u00ED stadia i kvantifikov\u00E1ny parametry, kter\u00E9 determinuj\u00ED \u00FAnavovou \u017Eivotnost. \u0158e\u0161en\u00ED projektu v\u00FDznamn\u011B prohloub\u00ED dosavadn\u00ED znalosti o mechanismech vedouc\u00EDch k \u00FAnavov\u00E9mu lomu." . "fotique damage" . "http://www.isvav.cz/projectDetail.do?rowId=IAA2041201"^^ . "The aim of the proposed project is, in link to previous project on cyclic plasticity, to reveal new findings on the mechanisms of the fatigue damage in advanced materials, preferably in the early stages, when its detection is difficult but it is decissive for fatigue life. In austenitic, ferritic and austenitic-ferritic duplex steels we shall study the localisation of the cyclic plastic strain, the formation of surface relief, the initiation of natural cracks and the growth of short cracks. Experimental finding on the growth of extrusion and intrusion and on the short crack growth will be confronted with the proposed models in order to improve existing models and obtain informations which can serve in the modification of the structure that result in better fatigue resistance. Important stages of fatigue damage will be identified and parameters that determine the fatigue life will be evaluated. The project will deepen our knowledge on the mechanisms, which results in fatigue fracture."@en . . . . . . "IAA2041201" . . "Mechanismy \u00FAnavov\u00E9ho po\u0161kozen\u00ED p\u0159irozen\u00FDch kompozit\u016F" . . . . "V\u00FDsledkem grantov\u00E9ho projektu je hlub\u0161\u00ED pozn\u00E1n\u00ED mechanism\u016F \u00FAnavov\u00E9ho po\u0161kozen\u00ED p\u0159irozen\u00FDch kompozit\u016F jako jsou duplexn\u00ED oceli a niklov\u00E9 superslitiny. Byly z\u00EDsk\u00E1ny nov\u00E9 poznatkyiniciaci a r\u016Fstu kr\u00E1tk\u00FDch trhlin a interpretov\u00E1n Coffin\u016Fv-Manson\u016Fv z\u00E1kon."@cs . "fotique damage; natural composite; duplex steel; cyclic stress"@en . . . "0"^^ . "0"^^ . "1"^^ . " duplex steel" . " natural composite" . . . "2007-09-26+02:00"^^ .