. . "Fracture toughness scatter in ceramics and brittle matrix composites at higher temperatures"@en . . . "Rozptyl lomov\u00E9 hou\u017Eevnatosti u keramik a kompozit\u016F s k\u0159ehkou matric\u00ED za zv\u00FD\u0161en\u00FDch teplot" . . "GP106/05/P119" . . "0"^^ . . . . "Fracture toughness; Ceramics; Brittle matrix composites; Chevron notch"@en . . . . "7"^^ . . "7"^^ . "http://www.isvav.cz/projectDetail.do?rowId=GP106/05/P119"^^ . "2007-12-31+01:00"^^ . " Ceramics" . . "2008-10-17+02:00"^^ . . . "Statistical aspects of fracture behaviour and fracture toughness evaluation of brittle matrix composites at higher temperatures will be followed. The aim is to analyse the scatter in fracture toughness values for selected monolithic ceramics and composite with long brittle fibres based on suitable statistical approach. Corresponding physical (microstructural, microfractographical) explanation of properties of the statistical distribution of fracture toughness data will be closely investigated. Bend specimens with chevron notch and the same having the straight notch will be employed for fracture toughness determination. The statistical characteristics thus enable to determine which test technique applied is more suitable for the assigned group of ceramics based materials. The effect of loading rate as well as specimen size effect on the applicability of chevron/straight notch technique will also be analysed due to their importance in connection with transferability of data."@en . "The project was solved during three years with the aim to clarify causes of fracture toughness scatter for ceramics and ceramics matrix composites. The main objective was to analyse physical (microstructural, microfractographical) aspects and provide an"@en . " Brittle matrix composites" . . "2005-01-01+01:00"^^ . . "Projekt byl \u0159e\u0161en po dobu t\u0159\u00ED let, v r\u00E1mci kter\u00FDch bylo pl\u00E1nov\u00E1no objasn\u011Bn\u00ED p\u0159\u00ED\u010Din rozptylu lomov\u00E9 hou\u017Eevnatosti keramik a kompozit\u016F s k\u0159ehkou matric\u00ED. C\u00EDlem bylo nalezen\u00ED mikrostukturn\u00EDch a mikromechanick\u00FDch p\u0159\u00ED\u010Din rozptylu hodnot lomov\u00E9 hou\u017Eevnatosti k"@cs . . "Fracture toughness" . "Projekt je orientov\u00E1n na hodnocen\u00ED vlivu zv\u00FD\u0161en\u00E9 teploty na lomov\u00E9 chov\u00E1n\u00ED kompozit\u016F s k\u0159ehkou matric\u00ED v\u010Detn\u011B sledov\u00E1n\u00ED statistick\u00FDch aspekt\u016F jejich poru\u0161ov\u00E1n\u00ED. C\u00EDlem projektu je analyzovat rozptyly hodnot lomov\u00E9 hou\u017Eevnatosti vybran\u00E9 monolitick\u00E9 keramiky a kompozitu s k\u0159ehkou matric\u00ED vyztu\u017Eenou k\u0159ehk\u00FDmi vl\u00E1kny zji\u0161t\u011Bn\u00E9 p\u0159i rozd\u00EDln\u00FDch teplot\u00E1ch za pou\u017Eit\u00ED vhodn\u00FDch statistick\u00FDch p\u0159\u00EDstup\u016F. Ned\u00EDlnou sou\u010D\u00E1st\u00ED bude hled\u00E1n\u00ED odpov\u00EDdaj\u00EDc\u00EDch fyzik\u00E1ln\u00EDch (mikrostrukturn\u00EDch, mikrofraktografick\u00FDch) p\u0159\u00ED\u010Din zji\u0161t\u011Bn\u00FDm vlastnostem rozptyl\u016F experiment\u00E1ln\u00EDch dat. Pro ur\u010Dov\u00E1n\u00ED charakteristik lomov\u00E9 hou\u017Eevnatosti bude pou\u017Eita jednak technika vyu\u017E\u00EDvaj\u00EDc\u00ED ohybov\u00E9 vzorky s vruby typu chevron a jednak technika zalo\u017Een\u00E1 na rovn\u00E9m vrubu u t\u011Bchto vzork\u016F. Z\u00EDskan\u00E9 poznatky o vlastnostech statistick\u00FDch rozptyl\u016F umo\u017En\u00ED kvalifikovan\u011B posoudit, kter\u00E1 z uveden\u00FDch metodik je vhodn\u011Bj\u0161\u00ED pro sledovanou skupinu keramik. Studium lomov\u00E9ho chov\u00E1n\u00ED bude nav\u00EDc zahrnovat vliv rychlosti zat\u011B\u017Eov\u00E1n\u00ED a velikosti zku\u0161ebn\u00EDch vzork\u016F na" . "2007-05-02+02:00"^^ . "0"^^ . . "1"^^ .