20.500.12556/RUL-119761 Deformacija anizotropne cilindrične lupine pod vplivom hidrostatičnega tlaka Deformation of an anisotropic cylindrical shell under hydrostatic pressure Podolgovate bakterije se pod hidrostatičnim tlakom, gledano skozi prizmo izotropnega materiala, deformirajo nekoliko neobičajno, saj se lahko ob pričakovanem manjšanju cilindričnega premera njihova dolžina povečuje. V tem delu smo predpostavili, da je razlog v anizotropni strukturi celične membrane bakterije. Postavili smo model bakterije, kot tankostenskega valja, iz homogenega, transverzalno izotropnega materiala, z usmeritvijo simetrijske osi v smeri nitastih struktur v steni bakterije. Za ta model smo nato izpeljali deformacijske enačbe. Enačbe smo nato analizirali ter ugotovili, da želeno deformacijsko stanje dobimo le za določeno kombinacijo snovnih parametrov. Z raziskavo smo pridobili ustrezen model, ki lahko opiše deformacijo bakterij in je preprost z vidika razumevanja kot tudi računanja dejanskih deformacij. Rod shaped bacteria under hydrostatic pressure load, observed from a perspective of an isotropic material, deform rather unusually, with the expected reduction of cylindrical diameter their length increases. In this work we assumed, that the reason for this is in the anisotropic structure of the cell wall of the bacterium. We set up a model of the bacterium as a thin-walled cylinder formed from a homogeneous, transversely isotropic material, with the symmetry axis in the direction of the fibrous structure within the cell wall. We then derived the deformation equations for this model. We analysed these equations and found out that we get the desired deformation state only for a specific combination of the base parameters. With this research we gained an appropriate model, that can describe the deformation of bacteria and is simple from the perspective of understanding it as well as actual computation of the deformation. deformacija bakterije analitični model nitasta struktura anizotropen material parametrična analiza deformation of a bacterium analytical model filamentous structure anisotropic material parametric analysis true false false [L. Brajnik] Slovenski jezik Angleški jezik Zaključna naloga 2020-09-11 08:31:17 2020-09-11 08:31:19 2023-10-20 09:37:26 0000-00-00 00:00:00 2020 0 Ljubljana 0 IX, 21 f. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 539.3:579.83:519.6(043.2) 224255 31472131 6149.pdf 6149.pdf 1 BC7F7D7A90B2FBA16802EBF69EEBE4C7 564230dac4958f513e116988584dc48bbdc36905f20825b38e50646bb3af15ec e9ce743e-a1b9-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=134491 Fakulteta za strojništvo 0 0 0