Gorazd Fajdiga (Avtor), Jože Flašker (Avtor), Srečko Glodež (Avtor)

Povzetek

The paper describes a general computational model for simulation of surface pitting of mechanical elements subjected to contact loading conditions. In the model it is assumed that the initial crack of length 0.015 mm is initiated at the contacting surfaces due to previously thermal, mechanical treatment of the material or running in process. The discretised model with the initial crack is then subjected to normal contact pressure, which takes into account the EHD lubrication conditions and tangential loading due to friction between contacting surfaces. The model accounts also for the influence of fluid trapped in the crack on crack prppagation. The virtual crack extension VCE method within FEM analysis is then used for 2 dimensional simulation of fatigue crack propagation from the initial crack up to the formation of the surface pit. The pit shapes and relationships between the stress intensity factor and crack length are determined for various combinations of contacting surface curvatures and loadings. The comparison of computational and available experimental results shows that the proposed model reliably simulates the surface fatigue crack growth under contact loading and can be used for computational predictions of surface pitting for various contacting mechanical elements.

Ključne besede

strojni elementi;zobniška gonila;kontaktni problemi;jamičenje;rast utrujenostne razpoke;simulacija;model;machine elements;gears;contact problems;pitting;fatigue crack growth;simulation;

Podatki

Jezik: Angleški jezik
Leto izida:
Tipologija: 1.01 - Izvirni znanstveni članek
Organizacija: UM FS - Fakulteta za strojništvo
UDK: 621.833:539.3
COBISS: 8436502 Povezava se bo odprla v novem oknu
ISSN: 0013-7944
Št. ogledov: 1545
Št. prenosov: 97
Ocena: 0 (0 glasov)
Metapodatki: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Ostali podatki

Sekundarni jezik: Angleški jezik
Sekundarne ključne besede: strojni elementi;zobniška gonila;kontaktni problemi;jamičenje;rast utrujenostne razpoke;simulacija;model;
URN: URN:SI:UM:
Strani: str. 747-758
Letnik: ǂVol. ǂ71
Zvezek: ǂiss. ǂ4/6
Čas izdaje: 2004
ID: 8718676