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Title:Pitting formation due to surface and subsurface initiated fatigue crack growth in contacting mechanical elements
Authors:Fajdiga, Gorazd (Author)
Glodež, Srečko (Author)
Kramar, Janez (Author)
Files:URL http://dx.doi.org/10.1016/j.wear.2006.11.016
 
Language:English
Work type:Unknown ()
Typology:1.01 - Original Scientific Article
Organization:FS - Faculty of Mechanical Engineering
Abstract:A computational model for simulation of surface and subsurface initiated fatigue crack growth due to contact loading is presented. The model is based on fracture mechanics theory where the required materials properties are obtained from common fatigue tests. For computational simulations an equivalent model of two contacting cylinders is used instead of simulating theactual contact of mechanical elements. The discretised model with the initial crack on or under the surface 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 considers also the moving contact of mechanical elements and for the surface initiated crack also the fluid trapped in the crack. The virtual crack extension method, implemented in the finite element method is then used for simulating the fatigue crack growth from the initial crack up to the formationof the surface pit. The numerical results correspond well with available experimental data. The described model can be used for simulation ofpitting phenomenon of contacting mechanical elements like gears, bearings, wheels, etc.
Keywords:fracture mechnaics, machine elements, gears, contact fatigue, pitting, subsurface crack initiation, computational analysis
Year of publishing:2007
UDC:621.833:539.388.1
ISSN on article:0043-1648
COBISS_ID:11227670 Link is opened in a new window
NUK URN:URN:SI:UM:DK:PT1HWURK
Views:1396
Downloads:78
Metadata:XML RDF-CHPDL DC-XML DC-RDF
Categories:Misc.
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Record is a part of a journal

Title:Wear
Shortened title:Wear
Publisher:Elsevier
ISSN:0043-1648
COBISS.SI-ID:5374213 New window

Secondary language

Language:English
Keywords:lomna mehanika, strojni elementi, zobniki, kontaktno utrujanje, jamičenje, podpovršinska razpoka, numerična analiza


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