Refinement and Evaluation of Rolling Bearing Load-Life Model.
Final rept. 10 Jan 68-30 May 69,
SKF INDUSTRIES INC KING OF PRUSSIA PA RESEARCH LAB
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The phenomenon of rolling contact failure has been mathematically modeled based on a defect life model considering two principal failure modes, viz, inclusion originated subsurface spalling failure and surface spalling failure precipitated by severe asperity interaction or surface defects. The distribution of rolling element lives has been analytically formulated based on defect life for the two failure modes to yield formulas which reduce to the current standard Lundberg-Palmgren formulation when sufficiently specialized, and in its general form provides multiplicative factors taking into account matrix strength properties, defect type and number, and the geometry of the macro-stress field. Special effects on the life of large size roller bearings are discussed. Based on the differences in defect properties between large and small size bearings, an approach has been proposed to refine the application of existing load rating methods to large bearings. Author
- Machinery and Tools