Abstract

This chapter discusses the causes of failure and some considerations for failure analysis. Failure is only one of the three ways in which engineering devices may reach the end of their useful life. The techniques to be applied to the analysis of the failures of tribological components depend on whether the failures are isolated events or repetitive incidents. Both require detailed examination to determine the primary cause, but in the case of repeated failures, establishing the temporal pattern of failure can be a powerful additional tool. Repetitive failures can be divided by time to failure according to the familiar “bath-tub” curve, comprising three regions: early-life failures, mid-life failures, and wear-outs. Weibull analysis is the most precise technique and is useful in component failure analysis.

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