"RIV/00216305:26210/06:PU63066" . "Comparison of a New Equation Describing Fatigue Crack Growth Cruves with the Narsgro Equation" . "1335-4205" . . "Tzv. Nagsrova rovnice zharnuje velimi dobr\u00FD popis k\u0159ivky r\u016Fstu \u00FAnavov\u00E9 trhliny. V roce 1999 prvn\u00ED autor tohoto \u010Dl\u00E1nku publikoval velmi podobnou rovnici, kter\u00E1 je ur\u010Dena pro dan\u00E9 asymetrick\u00E9 zat\u00ED\u017Een\u00ED s kladn\u00FDm pom\u011Brem R obsahuj\u00EDc\u00ED stejn\u00E9 prarametry se stejn\u00FDm v\u00FDznamem jako v nasgrov\u011B rovnici. Ve v\u011Bt\u0161in\u011B n\u00E1sledn\u00FDch studi\u00EDch tohoto autora tato rovnice vedla k lep\u0161\u00ED aproximaci ne\u017E nasgrova rovnice."@cs . "Communications" . "The so-called NASGRO equation allows a very good description of fatigue crack growth curves, i.e. the dependence of crack length increase per one fatigue cycle da/dN on the stress intensity factor range delta K. In 1999 the first author of this paper published quite similar equation, which written for given loading cycle asymmetry with positive stress ratio R contains the same parameters having similar meaning as in the NASGRO equation. In most cases studied by the authors this equation leads to a better fit than the NASGRO equation, above all when the experimental curve contains relatively long Paris straight line and/or relatively sharp bend from this line to the threshold stress intensity factor range. The generalization of the NASGRO equation for various values of stress ratio R was made in a quite complicated way. The new equation was generalized using the Walker model based on the relation delta K(R) = delta K(0)(1 - R)-m which is valid also for threshold value delta Kth but not for critical str" . "Porovn\u00E1n\u00ED nov\u00E9 rovnice popisuj\u00EDc\u00ED k\u0159ivku r\u016Fstu \u00FAnavov\u00E9 trhliny s Nargovou rovnic\u00ED"@cs . "Hrub\u00FD, Vojt\u011Bch" . . . . "RIV/00216305:26210/06:PU63066!RIV07-GA0-26210___" . "The so-called NASGRO equation allows a very good description of fatigue crack growth curves, i.e. the dependence of crack length increase per one fatigue cycle da/dN on the stress intensity factor range delta K. In 1999 the first author of this paper published quite similar equation, which written for given loading cycle asymmetry with positive stress ratio R contains the same parameters having similar meaning as in the NASGRO equation. In most cases studied by the authors this equation leads to a better fit than the NASGRO equation, above all when the experimental curve contains relatively long Paris straight line and/or relatively sharp bend from this line to the threshold stress intensity factor range. The generalization of the NASGRO equation for various values of stress ratio R was made in a quite complicated way. The new equation was generalized using the Walker model based on the relation delta K(R) = delta K(0)(1 - R)-m which is valid also for threshold value delta Kth but not for critical str"@en . "Comparison of a New Equation Describing Fatigue Crack Growth Cruves with the Narsgro Equation"@en . . "469219" . . . "Comparison of a New Equation Describing Fatigue Crack Growth Cruves with the Narsgro Equation"@en . . "3"^^ . "3"^^ . . "SK - Slovensk\u00E1 republika" . "V\u011Bchet, Stanislav" . "Fatigue, Fatigue crack Nasgro equation"@en . "Kohout, Jan" . "8" . "5"^^ . . "Comparison of a New Equation Describing Fatigue Crack Growth Cruves with the Narsgro Equation" . . . "4/2006" . "29-33" . . . "26210" . . "Porovn\u00E1n\u00ED nov\u00E9 rovnice popisuj\u00EDc\u00ED k\u0159ivku r\u016Fstu \u00FAnavov\u00E9 trhliny s Nargovou rovnic\u00ED"@cs . . "[871E6B96B0A0]" . "P(GA106/03/1265)" .