Micromechanical study of the effect of inclusions on fatigue failure in a roller bearing
作者： Michele Cerullo , Viggo Tvergaard
DOI: 10.1108/IJSI-04-2014-0020
关键词: Plane stress 、 Turbine 、 Structural engineering 、 Stress concentration 、 Materials science 、 Bearing (mechanical) 、 Matrix (mathematics) 、 Fatigue limit 、 Inclusion (mineral) 、 Numerical analysis
摘要: Purpose – The purpose of this paper is to carry out a set micromechanical analyses study the effect small inclusions on fatigue life wind turbine bearings. Design/methodology/approach local stress concentrations around an inclusion are determined from characteristic unit cell model containing single inclusion, using approximation 2D plane strain numerical analysis. Dang Van multiaxial criterion used for stresses in matrix material, ensure that remain within limit. material taken be one most commonly bearing steels, AISI 52100, and two different types considered. macroscopic histories applied correspond either Hertzian or elastohydrodynamic (EHL) contact pressure distribution under rollers. Findings shows sub-surface failure due rolling more likely develop close inclusion-matrix interface, at particular...
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