"[6E73DE94AA43]" . "RIV/00216305:26110/07:PU69820" . "Catania" . . "111-118" . "Vesel\u00FD, V\u00E1clav" . "Catania, It\u00E1lie" . . "Structural geometry, fracture process zone and fracture energy"@en . "New trends in fracture mechanics on concrete" . "3"^^ . . "Tento \u010Dl\u00E1nek je zam\u011B\u0159en na vliv velikosti a geometrie konstrukce na velikost a tvar lomov\u00E9 procesn\u00ED z\u00F3ny (LPZ) a n\u00E1sledn\u011B tak\u00E9 na pr\u016Fb\u011Bh lomov\u00E9 energie disipovan\u00E9 uvnit\u0159 LPZ b\u011Bhem lomov\u00E9ho procesu v konstrukc\u00EDch vyroben\u00FDch z kvazik\u0159ehk\u00FDch materi\u00E1l\u016F. Vliv geometrie konstrukce na jej\u00ED lomov\u00E9 chov\u00E1n\u00ED je zde pops\u00E1no pomoc\u00ED dvouparametrov\u00E9 lomov\u00E9 mechaniky, konkr\u00E9tn\u011B pomoc\u00ED constraintu nap\u011Bt\u00ED u \u010Dela ekvivalentn\u00ED elastick\u00E9 trhliny. Je zde d\u00E1le rozvinut koncept lomov\u00E9 energie. Pozornost se zam\u011B\u0159uje na nalezen\u00ED prost\u0159edn\u00ED (mezilehl\u00E9) f\u00E1ze lomu, kdy velikost a tvar LPZ (a sou\u010Dasn\u011B tak\u00E9 mno\u017Estv\u00ED energie disipovan\u00E9 uvnit\u0159 t\u00E9to z\u00F3ny) nen\u00ED p\u0159\u00EDmo ovliv\u0148ov\u00E1na voln\u00FDmi povrchy t\u011Blesa. V\u00FDzkum je prov\u00E1d\u011Bn prost\u0159ednictv\u00EDm numerick\u00FDch simulac\u00ED lomov\u00FDch test\u016F ve dvou zku\u0161ebn\u00EDch konfigurac\u00EDch vyzna\u010Duj\u00EDc\u00EDch se r\u016Fzn\u00FDmi pr\u016Fb\u011Bhy constraintu. Diskutov\u00E1ny jsou zde p\u0159edev\u0161\u00EDm vlastnosti pr\u016Fb\u011Bh\u016F lok\u00E1ln\u00ED/pr\u016Fm\u011Brovan\u00E9 lomov\u00E9 energie pod\u00E9l l"@cs . . "2007-06-17+02:00"^^ . "Neuveden" . . . "8"^^ . . . . "3"^^ . "Konstruk\u010Dn\u00ED geometrie, lomov\u00E1 procesn\u00ED z\u00F3na a lomov\u00E1 energie"@cs . "\u0158outil, Ladislav" . "Structural geometry, fracture process zone and fracture energy"@en . . "RIV/00216305:26110/07:PU69820!RIV08-MSM-26110___" . . . . . "This paper is focused on the influence of structural size and geometry on the size and shape of the fracture process zone (FPZ), and consequently on the progress of the fracture energy dissipated within the FPZ during the fracture process in structures made of quasi-brittle materials. The effect of structural geometry on its fracture behaviour is described here by two-parameter fracture mechanics, in particular by the constraint of stress near the equivalent elastic crack tip. The local fracture energy concept is evolved. Attention is paid to finding the intermediate stage of the fracture when there is no direct influence of the specimen boundary on the FPZ size and shape (and consequently the value of fracture energy dissipated within it). The research was conducted by means of numerical simulations of fracture tests in two testing configurations with different constraint conditions. The features of the distribution of local/averaged fracture energy along the specimen ligament are discussed. Based on" . "P(1M0579), P(GP103/07/P403)" . . . "978-0-415-44065-3" . "This paper is focused on the influence of structural size and geometry on the size and shape of the fracture process zone (FPZ), and consequently on the progress of the fracture energy dissipated within the FPZ during the fracture process in structures made of quasi-brittle materials. The effect of structural geometry on its fracture behaviour is described here by two-parameter fracture mechanics, in particular by the constraint of stress near the equivalent elastic crack tip. The local fracture energy concept is evolved. Attention is paid to finding the intermediate stage of the fracture when there is no direct influence of the specimen boundary on the FPZ size and shape (and consequently the value of fracture energy dissipated within it). The research was conducted by means of numerical simulations of fracture tests in two testing configurations with different constraint conditions. The features of the distribution of local/averaged fracture energy along the specimen ligament are discussed. Based on"@en . "Structural geometry, fracture process zone and fracture energy" . . "Structural geometry, fracture process zone and fracture energy" . "Ker\u0161ner, Zbyn\u011Bk" . "Konstruk\u010Dn\u00ED geometrie, lomov\u00E1 procesn\u00ED z\u00F3na a lomov\u00E1 energie"@cs . "structural size, structural geometry, fracture process zone, fracture energy, quasi-brittle material"@en . "452862" . . "26110" . . . .