A Novel Method for Determining the Stress-Life Exponent in Some Fatigue Experiments

952122

09/01/1995

Event
International Off-Highway & Powerplant Congress & Exposition
Authors Abstract
Content
Reliability research in hybrid ceramic bearings involves life testing of hybrid bearings and ceramic specimens. New materials for bearings like advanced ceramics have emerged for evaluation in recent years. In fatigue testing to determine the stress-life relationship, the number of sample size in life testing can be limited by consideration of cost and testing time. In the testing of ceramics, some researchers have relied on the use of a stepwise multiple loading approach to increase the failure data points. In this paper, a maximum likelihood method is applied to test data with multiple loads to estimate the stress-life exponent. This method treats the data at different loads or steps at once. Test data from three fatigue experiments using silicon nitride materials have been analyzed to obtain the stress-life exponents. Also, Weibull plots of the ‘equivalent lives' have been presented for all test specimens tested at different loads and load steps.
Meta TagsDetails
DOI
https://doi.org/10.4271/952122
Pages
10
Citation
Chiu, Y., "A Novel Method for Determining the Stress-Life Exponent in Some Fatigue Experiments," SAE Technical Paper 952122, 1995, https://doi.org/10.4271/952122.
Additional Details
Publisher
Published
Sep 1, 1995
Product Code
952122
Content Type
Technical Paper
Language
English