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http://dx.doi.org/10.3795/KSME-A.2006.30.11.1417

An Evaluation of Probabilistic Strain-Life Curve in Polyacetal  

Jang, Cheon-Soo (한양대학교 기계공학과)
Kim, Chul-Su (한국철도대학 철도차량기계과)
Park, Bum-Gyu (현대.기아자동차 연구개발본부)
Kim, Jung-Kyu (한양대학교 기계공학과)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.30, no.11, 2006 , pp. 1417-1424 More about this Journal
Abstract
In order to evaluate variation of fatigue life of mechanical components including engineering plastics, it is important to estimate probabilistic strain-life curves to accurately define the variation of fatigue characteristics. This paper intends to provide new assessment of P-$\varepsilon$-N (probabilistic strain-life curves) for considering the variation of fatigue characteristics in polyacetal. The fatigue strain controlled tests were conducted under constant 50% humidity and room temperature condition by a universal testing machine at strain ratio, R=0. A practical procedure is introduced to evaluate probabilistic strain-life curves. Three probabilistic distributions were used for generating P-$\varepsilon$-N curves such as normal, 2-parameter and 3-parameter Weibull. In this study, 3-parameter Weibull distribution was found to be most appropriate among assumed distributions when the probability distributions of the fatigue characteristic were examined using chi-square and Kolmogorov-Smirnov test. The more appropriate P-$\varepsilon$-N curves for these materials are generated by the proposed method considering 3-parameter Weibull distribution.
Keywords
Engineering Plastics; Polyacetal; Standard Normal Distribution; Weibull Distribution; Probabilistic Strain-Life Curve;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
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