12 KB271 KB10 KB200020242012Maruščak, P. O.številka:3letnik:46str. 193-195ISSN:1580-2949COBISSID:931498URN:URN:NBN:SI:doc-ZK53P33OenInštitut za kovinske materiale in tehnologijeMateriali in tehnologijecontinuous castingcracksdamagediagnosticsdiagnostikafractalfraktalikontinuirano litjepoškodbepovršinerazpokesurfacethermal fatiguetoplotna utrujenostAutomated fractal analysis of a network of thermal fatigue cracks| Avtomatična fraktalna analiza mreže razpok zaradi termične utrujenosti|We have studied continuous-casting machine rolls' surface thermal cracking images. On the fundamentals of fractals a thermal cracking procedure analysis was proposed. The achieved results show that the thermal cracks have a strong self-similarity, according to the fractal laws, and the values of the fractal dimensions range from 1.0 to 2.0. The relationship between the fractal dimensions and the distribution values of the cracks' lengths is established. A new method of diagnostics and certain ideas for the analysis of the thermal cracking of a continuous casting machine roll with fractals theory is proposedRaziskana je površina valjev naprave za kontinuirano litje s toplotnimi razpokami. Uporabljena je procedura fraktalne analize razpok. Dobljeni rezultati kažejo, da so po fraktalnih zakonih toplotne razpoke med seboj podobne in imajo fraktalno dimenzijo v območju 1,0 do 2,0. Opredeljena je odvisnost med fraktalno dimenzijo in porazdelitvijo dolžine razpok. Na podlagi fraktalne teorije je predlagana nova diagnostična metoda in nove ideje za analizo toplotnega razpokanja na napravi za kontinuirano litjeTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaInštitut za kovinske materiale in tehnologije