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Evaluation of Statistical Fatigue Life of Hybrid Composite Joints in Low-Floor Bus

저상버스용 하이브리드 복합재 조인트부의 통계적 피로수명평가

  • Jung, Dal-Woo (Dept. of Mechanical Engineering, Graduate school, Hanyang Univ.) ;
  • Choi, Nak-Sam (Dept. of Mechanical Engineering, Hanyang Univ.)
  • 정달우 (한양대학교 대학원 기계공학과) ;
  • 최낙삼 (한양대학교 기계정보경영공학부)
  • Received : 2010.07.01
  • Accepted : 2010.10.05
  • Published : 2010.11.01

Abstract

The reliable fatigue life for hybrid composite joint structures was estimated by a statistical method for evaluating fatigue life; the results of the fatigue test varied widely. Cyclic bending tests were performed on a cantilever beam with a hybrid composite joint, which was developed for the body of a low-floor bus. In order to estimate the fatigue life of the hybrid composite joint structure by comparing the data obtained during the fatigue tests, the most suitable probabilistic density function among the normal, lognormal, and Weibull distributions was selected. The probabilistic-stress-life (P-S-N) curves calculated by using the selected Weibull distribution was suggested for process of statistical fatigue life estimation and reliability design.

Keywords

Statistical Fatigue Life Evaluation;Hybrid Composite Joint;Probabilistic-Stress-Life Curve;Cyclic Bending Tests

Acknowledgement

Supported by : 한국연구재단

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