"[A1D91C5D3985]" . "Regresn\u00ED funkce tranzitn\u00EDch k\u0159ivek"@cs . . . "Regression Functions for Transition Curves"@en . "Regresn\u00ED funkce tranzitn\u00EDch k\u0159ivek"@cs . . "Regression Functions for Transition Curves" . "86" . "2"^^ . "Kohout, Jan" . "2"^^ . "PL - Polsk\u00E1 republika" . "5"^^ . "Loaded materials can fail by rapid fracture at stresses much below their strength level as determined in tests on carefully prepated specimens. To ensure fracture-safe design in the materials , the transition-temperature approach is often used. One of the experimental possibilities determining transition temperature isn the Charpy impact test, when a notched-bar speciamen is loaded in bending by a swinging pendulum and the energy absorbed in the fracturing specimen is measured. Impact energy vs. temperaature curve called transitioncurve is divided into three regions : the region of lower temperatures with brittle fracture and low values of absorbed energy (lower shelf), the transition region, and the region of higher temperatures with ductile fractureand high values of absorbed energy (higher shelf). Often also the lateral expansion of broken bars and percentage of brittle (or ductile) fracture surface is measured." . "Pomoc\u00ED test\u016F speci\u00E1ln\u011B p\u0159ipraven\u00FDch vzork\u016F bylo zji\u0161t\u011Bno, \u017Ee materi\u00E1ly se mohou b\u011Bhem zat\u011B\u017Eov\u00E1n\u00ED n\u00E1hle poru\u0161it p\u0159i nap\u011Bt\u00EDch ni\u017E\u0161\u00EDch ne\u017E mez pevnosti v d\u016Fsledku zm\u011Bny teploty. Pro posouzen\u00ED lomov\u00E9ho chov\u00E1n\u00ED materi\u00E1l\u016F v z\u00E1vislosti na teplot\u011B, tzv. tranzitn\u00EDho lomov\u00E9ho chov\u00E1n\u00ED se pou\u017E\u00EDv\u00E1 zkou\u0161ka r\u00E1zem v ohybu, p\u0159i kter\u00E9 doch\u00E1z\u00ED k p\u0159era\u017Een\u00ED zku\u0161ebn\u00EDho t\u011Bl\u00EDska s vrubem jedn\u00EDm r\u00E1zem tzv. Charpyho kladiva a m\u011B\u0159\u00ED se absorbovan\u00E1 energie p\u0159i poru\u0161en\u00ED vzorku. K\u0159ivka z\u00E1vislosti velikosti n\u00E1razov\u00E9 pr\u00E1ce na teplot\u011B sse naz\u00FDv\u00E1 tranzitn\u00ED k\u0159ivka a je rozd\u011Blena na t\u0159i oblasti : oblast ni\u017Ek\u00FDch teplot s k\u0159echk\u00FDm lomem a n\u00EDzk\u00FDmi hodnotami n\u00E1razov\u00E9 pr\u00E1ce, p\u0159echodov\u00E1 oblast a oblast vysok\u00FDch teplot s vysok\u00FDmi hodnotami n\u00E1razov\u00E9 pr\u00E1ce a s tv\u00E1rn\u00FDm lomem"@cs . "Loaded materials can fail by rapid fracture at stresses much below their strength level as determined in tests on carefully prepated specimens. To ensure fracture-safe design in the materials , the transition-temperature approach is often used. One of the experimental possibilities determining transition temperature isn the Charpy impact test, when a notched-bar speciamen is loaded in bending by a swinging pendulum and the energy absorbed in the fracturing specimen is measured. Impact energy vs. temperaature curve called transitioncurve is divided into three regions : the region of lower temperatures with brittle fracture and low values of absorbed energy (lower shelf), the transition region, and the region of higher temperatures with ductile fractureand high values of absorbed energy (higher shelf). Often also the lateral expansion of broken bars and percentage of brittle (or ductile) fracture surface is measured."@en . "RIV/00216305:26210/05:PU55637!RIV06-GA0-26210___" . . "Regression Functions for Transition Curves"@en . "P(GA106/03/1265), Z(MO0FVT0000404)" . "540519" . . . . . . . . "241-245" . . . "Zeszyty naukowe politechniki Opolskiej seria Mechanika" . "Regression Functions for Transition Curves" . . "308" . "V\u011Bchet, Stanislav" . "26210" . "1429-6055" . . . "RIV/00216305:26210/05:PU55637" . "Regression Funciton, Regression Parameters"@en . .