20.500.12556/RUL-153329 Koncept bistabilnega ravninskega nosilca za izvedbo stikala z zvezno nastavljivo silo Concept of bistable planar beam as a switch with continuously tunable force V sodobnem strojništvu se pojavlja težnja po čim manjši porabi materiala ter čim manjši teži izdelkov, zato se čedalje pogosteje srečujemo z vitkimi strukturnimi elementi. Pri njih je v procesu konstruiranja potrebno veliko pozornosti nameniti stabilnosti. Izguba stabilnosti je običajno močno nezaželen pojav, v posebnih primerih aplikacij, npr. pri stikalih, pa velja ravno obratno, ko funkcionalnost temelji ravno na čim hitrejši izgubi stabilnosti. V sklopu magistrske naloge bo sprva obravnavan raven členkasto podprt nosilec, ki je obremenjen z nadkritično silo, ki deluje v smeri zveznice med podporama, dokler se nosilec ne ukloni in znatno upogne. Naknadno je nosilec na konveksnem delu največjega prečnega povesa obremenjen še s silo, ki deluje prečno na zveznico med podporama, dokler ne pride do preskoka sistema. V nalogi bo tako potrebno najprej v skladu s teorijo velikih deformacij tankih struktur analizirati razmere na nosilcu po uklonu, določiti velikost upogibnih deformacij, zmanjšanje projekcije nosilca glede na zveznico med podporama in vpliv omenjenih veličin na kritično prečno silo preskoka sistema. Teoretični model bo potrebno preveriti še eksperimentalno. In modern mechanical engineering, there is a tendency to minimize material consumption and the weight of products, which is why we are increasingly encountering slender structural elements. During their design process, a lot of attention must be paid to stability. Loss of stability is usually a highly undesirable occurrence, but in special cases of applications, such as in switches, the opposite is true, where functionality is based on the rapid loss of stability. In the context of the master's thesis, an initially straight pinned-supported beam loaded with a supercritical force acting along the line connecting the supports will be considered until the beam buckles and significantly bends. Subsequently, the beam is loaded on the convex part of the largest transverse deflection with a force acting perpendicular to the line between the supports until a system jump occurs. The task will thus first require, in accordance with the theory of large deformations of thin structures, to analyze the conditions on the beam after buckling, determine the magnitude of bending deformations, the reduction in the projection of the beam with respect to the line between the supports, and the influence of these quantities on the critical transverse force of system jump. The theoretical model will also need to be verified experimentally. bistabilni nosilec stabilnostni problemi uklon preskok sistema stikalo bistable beam stability problems buckling snap-through switch true false false [E. Štukelj] Slovenski jezik Angleški jezik Magistrsko delo/naloga 2023-12-22 08:30:35 2023-12-22 08:30:39 2024-02-20 14:21:44 0000-00-00 00:00:00 2023 0 Ljubljana 0 XX, 52 str. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 624.075.2:535.42:531.36(043.2) 259894 186195459 32657.pdf 32657.pdf 1 7055117D31D2926A9C898CA4B3D526A4 861ad17227746747d8ffc4e38479dc46151ccfdec9668a5b6cc1a9a79dd2136e 01682b70-a09c-11ee-90ad-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=179260 Fakulteta za strojništvo 0 0 0