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Accession Number:
AD0832929
Title:
DEVELOPMENT OF A MATHEMATICAL MODEL FOR PREDICTING LIFE OF ROLLING BEARINGS
Corporate Author:
SKF INDUSTRIES INC KING OF PRUSSIA PA RESEARCH LAB
Report Date:
1968-04-01
Abstract:
A description of rolling contact failure modes is given and the variables affecting the life of a rolling contact are identified. A mathematical model of subsurface and surface crack propagation is presented. The life to failure of volume elements in the vicinity of a defect is formulated. A term severity of a micro defect has been defined. The model is characterized by the inclusion of bulk material parameters, defect characteristics and parameters of geometry, stress, lubrication and surface topography. A statistical expression for the life of an entire rolling body is based on the defect life formula. The new model includes current standard bearing life prediction formulas as a special case. To assist in interpretation of the model, the stressed volume in a Hertzian elliptical stress field has been determined from the computed contours of equal reversing shear stress. A stress analysis has been conducted on the stresses near interacting asperities and around a surface defect furrow. Author
Descriptive Note:
Final rept. 22 Dec 1966-22 Dec 1967
Pages:
0159
Distribution Statement:
Approved for public release; distribution unlimited.
Contract Number:
F30602-67-C-0147
File Size:
7.97MB
