ISSN: 0090-3973
Page Count: 4

Reliability and Life Estimation from Component Fatigue Failures Below the Go-No-Go Fatigue Life Limit
Parida, N
Scientist, National Metallurgical, Laboratory,

Abstract

The true reliability and the fatigue life of a connecting link made of low-alloy high-strength steel have been estimated from go-no-go fatigue test. Tests were conducted on a sample size of 130 randomly selected from a population of different heats. Test results were statistically evaluated using binomial, log-normal, and weibull distributions; the sample reliability was compared with the reliabilities estimated from all three of these distributions. It was observed that for a go-no-go test binomial distribution is preferred for more conservative estimation of the true reliability. The results also show that the life of the link follows a Weibull distribution.

Keywords:
go-no-go fatigue tests, fatigue life, reliability, confidence level, log-normal distribution, binomial distribution, two-parameter Weibull distribution

Paper ID: JTE12607J
DOI: 10.1520/JTE12607J
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