A Statistical Study of Multiple-Rig Rolling Fatigue Testing.
Abstract
Ten rolling fatigue testers, using a 4-ball test specimen configuration with AISI 52100 CEVM steel balls, were employed in evaluating the rolling fatigue lives of two typical aviation gas turbine lubricants, a MIL-L-7808G lubricant and a MIL-L-23699 lubricant. A total of 100 tests were conducted with each lubricant, comprising 10 tests of each of the 10 testers. The test conditions were such that the operation was definitely in the boundary lubrication regime. The rolling fatigue lives of the two lubricants under these conditions were found to be nearly the same at 90-percent confidence level. Using the results obtained, an analysis was made of the statistical implications and economic considerations involved in multiple-rig rolling fatigue testing. Factors studied were the effects of tester-to-tester variation, the number of tests, and the extent of test suspension. Precautions and techniques in multiple-rig rolling fatigue testing are discussed. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1971
- Accession Number
- AD0727759
Entities
People
- E. L. Anderson
- P. M. Ku
Organizations
- Southwest Research Institute