Weibull Parameters Estimation Based on Physics of Failure Model

Reliability estimation procedures are discussed for the example of fatigue development in solder joints using a physics of failure model. The accumulated damage is estimated based on a physics of failure model, the Rainflow counting algorithm and the Miner's rule. A threshold model is used for...

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Bibliographic Details
Published inIISE Annual Conference. Proceedings p. 1
Main Authors Kostandyan, Erik E, Sørensen, John D
Format Journal Article
LanguageEnglish
Published Norcross Institute of Industrial and Systems Engineers (IISE) 01.01.2012
Subjects
Fatigue failure
Parameter estimation
Physics
Reliability
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Summary:Reliability estimation procedures are discussed for the example of fatigue development in solder joints using a physics of failure model. The accumulated damage is estimated based on a physics of failure model, the Rainflow counting algorithm and the Miner's rule. A threshold model is used for degradation modeling and failure criteria determination. The time dependent accumulated damage is assumed linearly proportional to the time dependent degradation level. It is observed that the deterministic accumulated damage at the level of unity closely estimates the characteristic fatigue life of Weibull distribution. Methods from structural reliability analysis are used to model the uncertainties and to assess the reliability for fatigue failure. Maximum Likelihood and Least Square estimation techniques are used to estimate fatigue life distribution parameters. [PUBLICATION ABSTRACT]