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Comparison of models for ball bearing dynamic capacity and life
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Gupta, Pradeep K. Oswald, Fred B. Zaretsky, Erwin V. |
| Copyright Year | 2015 |
| Description | Generalized formulations for dynamic capacity and life of ball bearings, based on the models introduced by Lundberg and Palmgren and Zaretsky, have been developed and implemented in the bearing dynamics computer code, ADORE. Unlike the original Lundberg-Palmgren dynamic capacity equation, where the elastic properties are part of the life constant, the generalized formulations permit variation of elastic properties of the interacting materials. The newly updated Lundberg-Palmgren model allows prediction of life as a function of elastic properties. For elastic properties similar to those of AISI 52100 bearing steel, both the original and updated Lundberg-Palmgren models provide identical results. A comparison between the Lundberg-Palmgren and the Zaretsky models shows that at relatively light loads the Zaretsky model predicts a much higher life than the Lundberg-Palmgren model. As the load increases, the Zaretsky model provides a much faster drop off in life. This is because the Zaretsky model is much more sensitive to load than the Lundberg-Palmgren model. The generalized implementation where all model parameters can be varied provides an effective tool for future model validation and enhancement in bearing life prediction capabilities. |
| File Size | 1427555 |
| Page Count | 36 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20160001346 |
| Archival Resource Key | ark:/13960/t7gr1xb4m |
| Language | English |
| Publisher Date | 2015-06-01 |
| Access Restriction | Open |
| Subject Keyword | Rolling-element Fatigue Ball Bearings Fatigue Life Dynamic Characteristics Comparison Life Durability Computerized Simulation Elastic Properties Prediction Analysis Techniques Computer Programs Loads Forces Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
