Surface fatigue crack growth in lubricated rolling/sliding contact
Fajdiga, Gorazd ; Glodež, Srečko ; Flašker, Jože
A two-dimensional computational model for simulation of surface pitting of mechanical elements subjected to contact loading conditions is presented. In the model it is assumed the initial crack of ...length 0.015 mm is initiated at the contacting surfaces due to previously thermal or mechanical treatment of the material. 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 propagation. The virtual crack extension (VCE) method in the framework of finite element analysis is then used for two-dimensional simulation of fatigue crack propagation under contact loading from the initialcrack up to the formation of the surface pit.
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