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The Probabilistic Analysis of Fatigue Damage Accumulation Behavior Using Markov Chain Model in CFRP Composites

Markov Chain Model을 이용한 CFRP 복합재료의 피로손상누적거동에 대한 확률적 해석

  • 김도식 (한양대학교 산업과학기술연구소) ;
  • 김정규 (한양대학교 기계설계학과) ;
  • 김인배 (현대정공(주) 마북리연구소)
  • Published : 1996.04.01

Abstract

The characteristics of fatigue cumulative damage and fatigue life of 8-harness satin woven CFRP composites with a circular hole under constant amplitude and 2-level block loading are estimated by Stochastic Makov chain model. It is found in this study that the fatigue damage accumulation behavior is very random and the fatigue damage is accumulated as two regions under constant amplitude fatigue loading. In constant amplitude fatigue loading the predicted mean number of cycles to a specified damage state by Markov chain model shows a good agreement with the test result. The predicted distribution of the fatigue cumulative damage by Markov chain model is similar to the test result. The fatigue life predictions under 2-level block loading by Markov chain model revised are good fitted to the test result more than by 2-parameter Weibull distribution function using percent failure rule.

Keywords

CFRP Composites;Stochastic Markov Chain Model;2-Level Block Loading;Secant Modulus;Fatigue Cumulative Damage;Fatigue Life