統計的疲労破壊確率に基づく機械・構造部材の耐疲労信頼性設計手法(<小特集>信頼性工学)

概要

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The present paper deals with the reliability-based fatigue-Proof design based upon a practical viewpoint through correct evaluation of engineering uncertainties caused by use of a limited number of experimental data. To this end is first discussed the distribution Properties of the statistical failure probability constructed with the aid of parameter estimatorsion the Weibull distribution. At the same time, the effect of sample size on the estimation of failure probability is also investigated. Comparison is made between Shapes of the distribution function of the statistical failure probabilities based upon a Weibull and alog-normal model in order to clarify which is more practical as the fatigue life distribu-tion mode1 of structqral components. Furthermore, discussions are made on how to determine the opti mum sample size of the fatigue experiment in order to meet the prescribed level of reliability imposed on structural compoent S. Finally, a Simple but important design Principleis proposed for the reliability-based fatigue-Proof design of structural compone with weibulil fatigue life distribution.
社団法人日本材料学会の論文
1991-03-15