Numerical modelling of rolling contact fatigue damage initiation from non-metallic inclusions in bearing steel

被引：23

作者：

Ravi, Gopalakrishnan ^{[1
,2
]}

De Waele, Wim ^{[1
]}

Nikolic, Ksenija ^{[2
,3
]}

Petrov, Roumen ^{[3
,4
]}

Hertel, Stijn ^{[1
]}

机构：

[1] Univ Ghent, Dept EMSME, Soete Lab, Ghent, Belgium

[2] SIM Vzw, Technol Pk 48, B-9052 Zwijnaarde, Belgium

[3] Univ Ghent, Dept EMSME, Mat Sci & Technol, Ghent, Belgium

[4] Delft Univ Technol, Dept MSE, Delft, Netherlands

来源：

TRIBOLOGY INTERNATIONAL | 2023年 / 180卷

关键词：

Rolling contact fatigue; Crack initiation; Finite element simulation; Non-metallic inclusion; Debonding; LIFE PREDICTION; FAILURE;

D O I：

10.1016/j.triboint.2023.108290

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Bearing failure is a cause of concern in a variety of machinery such as turbines, transmissions, drills, engines, etc. It is often associated with rolling contact fatigue (RCF) triggered from damage initiation at non-metallic in-clusions (NMI's). Experimental evidence shows that damage initiation lifetime is highly sensitive to the NMI characteristics and its bonding with the steel matrix. This study numerically investigates the role of NMI features and its bonding with the steel matrix on damage initiation lifetime. NMI characteristics modelled in this study are derived from an experimental investigation of a failed bearing. Simulation results highlight a near to instanta-neous debonding at the matrix-inclusion interface followed by accelerated crack initiation. The critical depth for damage initiation shifts towards the surface with the increase in friction coefficient between roller and raceway. The simulations also reveal that larger inclusions show earlier damage initiation, indicating a size effect. The damage hotspots from the simulation results were compared with experimental findings and a hypothesis for crack initiation from a NMI is put forward.

引用

页数：13

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