Analysis of sets of two-parameter Weibull data arising in rolling contact endurance testing.

J. I. McCool

Research output: Contribution to journalArticlepeer-review

Abstract

Frequently in conducting rolling contact endurance tests, several small samples are subjected to some kink of 'treatment'. It is shown here that if the treatment affects the rating life but not the Weibull shape parameter the data can be analyzed as a set rather than as individual samples, with considerable improvement in the precision with which the rating lives can be estimated. Methods and supporting tables are given for the detailed analysis of sets of such data under the assumption that they represent censored data samples drawn from two parameter Weibull populations. As an illustration, the analyses are applied to two sets of rolling contact endurance data obtained with various steel materials fabricated into cylindrical rod and ball test specimens. Two procedures for the selection of sample size are discussed, and illustrative examples are given of their use. (from author's abstract)

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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