Faculty of Mechanical Engineering, Lj. (FSLJ)
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Napovedovanje zdržljivosti izdelkov v razvoju = [Prediction of fatigue life in the R&D process] : doktorsko deloOrbanić, PetarZdržljivost proizvodov je v splošnem odvisna od zdržljivosti samega materiala, oblike konstrukcije, obremenitvenih stanj in razmer, v katerih obratuje. Modeliranje zdržljivosti v razvoju novega ... proizvoda za obdobje eksploatacije je uspešno le, če je napoved obremenitvenih stanj uspešna, če so dovolj detajlno popisane ostale obremenitvene razmere in okolje in če so modeli za simulacijo nastanka in širjenja okvar dobri. Ker pa na vse tri skupine naključnih procesov vpliva izredno veliko število vplivnih, a naključnih parametrov, ki so statistično odvisni in pri čemer je njihov vpliv praviloma nelinearen, je bila zdržljivost proizvodov modelirana z nevronskimi mrežami. Na osnovi nevronskih mrež je bila razvita simulacijska metoda, s katero je mogoče že v zgodnjih fazah razvoja uspešno napovedati zdržljivost proizvodov pod pogojem, da so obremenitvena stanja proizvodov in zdržljivost uporabljenih materialov vsaj v grobem poznani. Metoda je bila aplicirana na primerih enostopenjsega in večstopenjskega utrujanja preizkušancev iz dveh aluminijevih zlitin, dveh površinskih obdelav in različnih površinskih pritiskov v spoju z jeklom. Metoda je pokazala znatne prednosti pred klasičnimi metodami napovedovanja življenjske dobe. Dokazana je enaka kakovost napovedi, ki je dosežena s 25% manjšim obsegom potrebnih preizkušenj. Razvita metoda je bila uporabljena tudi v procesu določanja notranjih obremenitev vozila v zgodnjih razvojnih fazah. Z uporabo razvite metode se je zmanjšal obseg potrebnih dinamičnih analiz, realnih voznih razmer za določitev vplivov na porazdelitev notranjih obremenitev, na vsega 10% prvotnega obsega.Type of material - dissertationPublication and manufacture - Ljubljana : [P. Orbanić], 2003Language - slovenianCOBISS.SI-ID - 5660955
Author
Orbanić, Petar
Other authors
Fajdiga, Matija
Topics
časovna trdnost |
obratovalna trdnost |
nevronske mreže |
napoved zdržljivosti |
dinamične analize |
dynamic strength |
operational strength |
neural network approach |
fatigue life prediction |
dynamical analysis
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Dr ORBANIĆ P. Napovedovanje IN: 00047950 Dr ORBANIĆ P. Napovedovanje IN: 00047950 |
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Orbanić, Petar | 17077 |
Fajdiga, Matija | 00819 |
Source: Personal bibliographies
and: SICRIS
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