| | SLO | ENG | Piškotki in zasebnost

Večja pisava | Manjša pisava

Iskanje po katalogu digitalne knjižnice Pomoč

Iskalni niz: išči po
išči po
išči po
išči po
* po starem in bolonjskem študiju

Opcije:
  Ponastavi


1 - 4 / 4
Na začetekNa prejšnjo stran1Na naslednjo stranNa konec
1.
A computational model for analysing the dry rolling/sliding wear behaviour of polymer gears made of POM
Aljaž Ignatijev, Matej Borovinšek, Srečko Glodež, 2024, izvirni znanstveni članek

Opis: This study presents a computational model to determine the wear behaviour of polymer gears. Using PrePoMax finite element numerical calculation software, a proposed computational model was built to predict dry rolling/sliding wear behaviour based on Archard’s wear model. This allows the calculation of the wear depth in each loading cycle with constant mesh updating using the finite element method. The developed computational model has been evaluated on a spur gear pair, where the pinion made of POM was meshed with a support gear made of steel. The computational results obtained were compared with the analytical results according to the VDI 2736 guidelines. Based on this comparison, it was concluded that the proposed computational model could be used to simulate the wear behaviour of contacting mechanical elements like gears, bearings, etc. The main advantage of the model, if compared to the standardised procedure according to the VDI 2736 guidelines, is the geometry updating after a chosen number of loading cycles, which enables a more accurate prediction of wear behaviour under rolling/sliding loading conditions.
Ključne besede: polymer gears, rolling/sliding contact, wear, computational modelling
Objavljeno v DKUM: 12.04.2024; Ogledov: 128; Prenosov: 6
.pdf Celotno besedilo (3,67 MB)
Gradivo ima več datotek! Več...

2.
Computational model for analysing the tooth deflection of polymer gears
Aljaž Ignatijev, Srečko Glodež, Janez Kramberger, 2024, izvirni znanstveni članek

Opis: A computational model for analysing the tooth deflection of polymer gears is presented in this paper. Because polymer gears have less stiffness compared to metal gears, the proposed approach considers a comprehensive analysis to determine the most suitable numerical model, i.e., the number of teeth that should be modelled for a given gear’s geometry and material. The developed computational model has been evaluated using a spur gear pair, where the pinion made of POM was meshed with a support gear made of steel. Material properties were assigned with linear elastic characteristics for the gear, while the pinion was characterised by hyperelastic properties using POM material. Furthermore, a nonlubricated frictional contact between the gear and pinion was considered in the numerical computations. The computational results that were obtained were compared to the empirical results according to VDI 2736 guidelines. Here, the computational approach showed more accurate results due to the hyperelastic material characteristics of POM and the simulation of multiple teeth meshing. However, VDI 2736 calculation showed comparability with the computational results, with a slightly larger deviation at higher loads. In this respect, the proposed computational approach is more suitable for analysing the tooth deflection of polymer gears under higher loads.
Ključne besede: polymer gears, tooth deflection, computational modelling
Objavljeno v DKUM: 19.03.2024; Ogledov: 197; Prenosov: 9
.pdf Celotno besedilo (3,57 MB)
Gradivo ima več datotek! Več...

3.
Računski model za analizo dinamične upogibne trdnosti sintranih zobnikov : magistrsko delo
Aljaž Ignatijev, 2021, magistrsko delo

Opis: Magistrsko delo vsebuje opis izdelave računskega modela za analizo sintranih zobnikov z uporabo numerične simulacije. V začetku je podanih nekaj teoretičnih osnov utrujanja materialov in tehnologije sintranja. Praktični primer sintranega zobnika je razdeljen na tri dele. Vsak del vsebuje določitev materialnih podatkov, robnih pogojev in predstavitev rezultatov numerične analize. Prvi del zajema trdnostno analizo. Drugi del vsebuje izračun življenjske dobe do iniciacije razpoke v korenu zoba zobnika. V tretjem delu prikazuje model z začetno razpoko in izračun življenjske dobe med širjenjem razpoke. V zadnjem delu je izračunana skupna življenjska doba. Na koncu je izdelana še primerjava dobljenih rezultatov z eksperimentalnimi.
Ključne besede: sintrani zobniki, utrujanje, deformacijska metoda, mehanika loma, življenjska doba, numerična simulacija
Objavljeno v DKUM: 15.04.2022; Ogledov: 857; Prenosov: 83
.pdf Celotno besedilo (3,33 MB)

4.
Optimizacija topologije zavornih čeljusti : diplomsko delo
Aljaž Ignatijev, 2019, diplomsko delo

Opis: Diplomsko delo obravnava optimizacijo topologije zavornih čeljusti. Najprej je prikazan analitični preračun obremenitev zavornih čeljusti. Nato sem naredil volumski model in mu dodal različne robne pogoje, materialne lastnosti in ga zamrežil s končnimi elementi. Narejena je optimizacija topologije v programu ProTOp, s tehnološkimi pogoji in brez njih, ter primerjava rezultatov. Z MKE analizo je prikazan vpliv temperaturnega raztezanja materiala in opis možnih posledic. Na koncu je opisana priprava modela za nadaljnjo uporabo. Dobljeni rezultati dokazujejo, da z zmanjšanjem teže zavorne čeljusti še zmeraj opravljajo svojo funkcijo.
Ključne besede: Optimizacija topologije, MKE, SolidWorks, Abaqus, ProTOp
Objavljeno v DKUM: 02.07.2019; Ogledov: 1441; Prenosov: 204
.pdf Celotno besedilo (7,22 MB)

Iskanje izvedeno v 0.1 sek.
Na vrh
Logotipi partnerjev Univerza v Mariboru Univerza v Ljubljani Univerza na Primorskem Univerza v Novi Gorici