Title Statistical evaluation of the parameters of low cycle fatigue curve for alloyed steels /
Translation of Title Legiruotųjų plienų mažaciklio nuovargio suirimo kreivės parametrų statistinis įvertinimas.
Authors Stulpinaitė, Agnė ; Šniuolis, Raimondas
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Is Part of Jaunųjų mokslininkų darbai. 2010, nr.3(28), p. 84-88.. ISSN 1648-8776
Keywords [eng] Low cycle loading ; Durability, parameters of Coffin’s curves ; Parameters of Coffin’s curves ; Modified plasticity criterion
Abstract [eng] In this work dependence of durability of alloyed structural steels used in nuclear engineering on mechanical characteristics was analyzed. The data of low cycle tests of 74 alloyed steels at room temperature and 52 alloyed steels at elevated temperature were used; the data were obtained at low-cycle fatigue laboratories of Kaunas University of Technology and Czech, Russia, and Hungary. Parameters me, Ce, mp, Cp of low cycle fatigue decomposition curves according to elastic and plastic deformations were identified. Statistical analysis confirmed that decomposition curves parameters and modified plasticity criterion (σu / σy) z are random and independent values, they have normal distribution and low-cycle durability has linear correlation with the modified plasticity. Analytical dependences of parameters me, Ce, mp, Cp on modified plasticity at room and elevated temperature are proposed for materials grouped by chemical composition. The comparison of calculated and experimental durability results has shown that the proposed analytical dependencies can be used for preliminary estimation of low cycle durability for Cr-Ni, Cr-Ni-Mo-V, Cr-Ni-Mo alloyed steels.
Type Journal article
Language English
Publication date 2010