4812 KB35 KB199920252019Klemenc, JernejPodgornik, Bojanštevilka:5letnik:65str. 265-275ISSN:0039-2480COBISSID_HOST:16644891URN:URN:NBN:SI:doc-JQNAFKNGenZveza strojnih inženirjev in tehnikov Slovenije etc.Strojniški vestnik51CrV4 steelconventional manufacturing technologyelectro-slag remeltingelektro-pretaljevanjejeklo 51CrV4konvencionalne izdelovalne tehnologijeneural networknevronske mrežeS-N curveS-N krivuljaAn improved model for predicting the scattered S-N curves|In this article an improved neural network model is presented that allows us to predict the scattered S-N curves. The model is capable of predicting the S-N curve in its high-cycle and very-high-cycle fatigue domains by considering also the increased scatter of the fatigue-life data below the knee point of the S-N curve. The scatter of the fatigue-life data for an arbitrary amplitude-stress level is modelled with a two-parametric Weibull%s probability density function, the parameters of which are varied as a function of the amplitude-stress level. The parameters of the S-N curve trend and its scatter distribution are not fixed, but depend on the parameters of the production process via a serial-hybrid neural network. The article presents the theoretical background and the application in the case of real experimental fatigue data for 51CrV4 spring steel manufactured with two different manufacturing technologies and two different heat treatmentsTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaUniverza v Ljubljani, Fakulteta za strojništvo