20.500.12556/RUL-139359 Napetostno stanje v slojevitem cilindričnem telesu med hitrim ohlajanjem Stress state in a laminated cylindrical body during rapid cooling V magistrski nalogi obravnavamo vpliv hitrega ohlajanja na človeški zob, ki ga opredelimo kot večplastno strukturo. Zaradi izpostavljenosti hladnejšemu mediju, se zob začne ohlajati, kot posledica temperaturne spremembe pa se ustvari napetostno stanje, ki lahko povzroči poškodbo zoba ali še dodatno poslabša že obstoječo poškodbo. Za analizo termomehanskega stanja v zobu izdelamo različne modele, ki upoštevajo različne geometrijske omejitve in različne pristope k reševanju problema, pri čemer v osnovi ločimo reševanje stacionarnega in nestacionarnega prevoda toplote. Modeli nam omogočajo napovedovanje ter analizo napetostnega in deformacijskega stanja v zobu glede na izbrane vhodne parametre. Z njihovim spreminjanjem prikažemo vpliv temperaturne razlike na velikost napetostnega stanja v zobu. Bistvena ugotovitev analize je, da večja temperaturna sprememba prispeva k večji amplitudi napetosti, hkrati pa večja temperaturna razlika terja tudi daljši čas do vzpostavitve stacionarnega stanja v zobu. In this master thesis we analyze the influence of rapid cooling on human tooth, which we characterize as a laminated structure. Due to exposure to colder medium, the tooth starts to cool down and the temperature change induces stresses in the tooth that can cause a new injury or worsens the existing one. To analyze the thermomechanical state inside the tooth we build various models, that take into account different geometrical restrictions and different approaches, such as varying between stationary and non-stationary heat transfer. These models allow us to predict and analyze the stress and deformation states in the tooth based on the selected input parameters. Through their modification we present the influence of the temperature difference on the amplitude of the stress state in human tooth. The main conclusion of the analysis is that larger temperature change contributes to higher stress amplitudes and at the same time require more time to reach stationary condition in the tooth. človeški zob prevod toplote napetostno stanje večplastna struktura temperaturna porazdelitev human tooth heat transfer stress state laminated structure temperature distribution true false false [U. Gramc] Slovenski jezik Angleški jezik Magistrsko delo/naloga 2022-09-01 08:31:31 2022-09-01 08:31:32 2023-10-20 09:27:16 0000-00-00 00:00:00 2022 0 Ljubljana 0 XXII, 81 str. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 539.4.012:621.78.082:616.314(043.2) 243924 120019715 17418.pdf 17418.pdf 1 9EDAB13C078C139D5B4B9FB3DF92E31C f94d8b76835c387e966c9d922daac98375ba76f967bfad3d6fb6973e63d50e3b aebe9279-29bf-11ed-92af-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=159901 17419.nb 17419.nb 1 5BB8DE6552521DAC5FB2A73178F6D2F5 39e5f359f0f1adac10fceac5298f96cd90d71a2ca226db1803e20c78b3ce1350 aebf3ba2-29bf-11ed-92af-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=159902 17420.nb 17420.nb 1 FB6A2D86CA2541DE531BBCABD668D494 52aca9c3ae4fee60d88f938578a4d2c2730343422b0ec9f4db77108655b252f0 aebf9a4a-29bf-11ed-92af-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=159903 17421.nb 17421.nb 1 D3BEC950195FED1AFB756E4C30212B34 33e009069502522d3382f5340f4c756f4c199358acab94924771899f40e66fe2 aebfc9a0-29bf-11ed-92af-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=159904 17422.nb 17422.nb 1 FA1EB41C9CA31B7184FDA5129B621939 037385c04ba222f345f8d4c8f887a5fa8bd1db997cc0eccc36b12efc08ed297f aec011db-29bf-11ed-92af-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=159905 Fakulteta za strojništvo 0 0 0