Quantitative evaluation of the flaking strength of rolling bearings with small defects as a crack problem

•Rolling contact fatigue tests of bearing steel JIS-SUJ2 steel were conducted.•Specimen had a drilled hole at the mid-point of the raceway.•Fracture was dominated by shear-mode fatigue crack-growth from the edge of hole.•Fatigue limit was successfully evaluated as a small crack problem. Rolling cont...

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Bibliographic Details
Published in:International journal of fatigue 2019-02, Vol.119, p.195-203
Main Authors: Hashimoto, Sho, Komata, Hiroki, Okazaki, Saburo, Matsunaga, Hisao
Format: Article
Language:English
Subjects:
Bearing races
Bearing strength
Compression tests
Crack propagation
Defects
Fatigue
Fatigue failure
Fatigue tests
FEM analysis
Flaking
Fracture mechanics
Materials fatigue
Quantitative analysis
Roller bearings
Rolling contact
Rolling contact fatigue
Shear-mode fatigue crack
Small defect
Stress intensity factor
Stress intensity factors
Torsional fatigue
Ultrasonic testing
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Summary:•Rolling contact fatigue tests of bearing steel JIS-SUJ2 steel were conducted.•Specimen had a drilled hole at the mid-point of the raceway.•Fracture was dominated by shear-mode fatigue crack-growth from the edge of hole.•Fatigue limit was successfully evaluated as a small crack problem. Rolling contact fatigue (RCF) tests were conducted on rolling bearings with drilled holes at the mid-point of the raceway. Flaking limit was determined by the shear-mode threshold of a crack that emanated at the edge of drilled hole. To quantify the RCF strength according to fracture mechanics principles, Mode II stress intensity factor (SIF) range of the crack was derived. Taking a small crack effect on the shear-mode fatigue crack into account, RCF strength was successfully evaluated as a crack problem, irrespective of the diameters and depths of the hole. The values of the threshold SIF range obtained by RCF tests were in good agreement with those obtained in the torsional fatigue tests under static compression.
ISSN:0142-1123
1879-3452
DOI:10.1016/j.ijfatigue.2018.10.003