대한기계학회논문집A (Transactions of the Korean Society of Mechanical Engineers A)

  • 제35권8호
  • /
  • Pages.913-920
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  • 2011
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  • 1226-4873(pISSN)
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  • 2288-5226(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
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경량 복합재 대차프레임의 피로수명 및 강도 평가

An Evaluation of Fatigue Life and Strength of Lightweight Bogie Frame Made of Laminate Composites

  • 전광우 (한밭대학교 기계설계공학과) ;
  • 신광복 (한밭대학교 기계설계공학과) ;
  • 김정석 (한국철도기술연구원 구조연구실)
  • Jeon, Kwang-Woo (Dept. of Mechanical Design Engineering, Hanbat Nat'l Univ.) ;
  • Shin, Kwang-Bok (Dept. of Mechanical Design Engineering, Hanbat Nat'l Univ.) ;
  • Kim, Jung-Seok (Dept. of Railway Structure Research, Korea Railway Research Institute)
  • 투고 : 2010.12.27
  • 심사 : 2011.07.12
  • 발행 : 2011.08.01
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초록

본 논문은 4-매 주자직 유리섬유/에폭시 적층 복합재가 적용된 철도차량 경량 대차프레임의 피로 수명 및 강도 평가에 대해 기술한다. 대차프레임 경량화 재질로 적용된 유리섬유/에폭시 4-매 주자직 적층 복합재료의 피로특성 평가를 위하여 경사, 위사 그리고 $0^{\circ}/90^{\circ}$ 방향으로 적층된 시험편에 대하여 인장-압축 피로시험을 수행하였다. 유리섬유/에폭시 4-매 주자직 적층 복합재료의 피로시험은 5Hz의 주파수, -1의 응력비(R), $10^7$의 피로수명을 갖도록 하였다. 또한, JIS E 4207의 하중조건에 따른 대차프레임의 피로강도 평가를 Goodman 선도를 통하여 수행하였다. 유리섬유/에폭시 적층 복합재 경량 대차프레임의 피로수명 및 강도 평가기준을 만족하였으며, 무게를 고려할 경우 기존 대차프레임 재질인 SM490A 금속재에 비하여 우수한 피로특성을 갖는다.

We describe the evaluation of the fatigue life and strength of a lightweight railway bogie frame made of glass fiber/epoxy 4-harness satin-woven composites. To obtain the S-N curve for the evaluation of the fatigue characteristics of the composite bogie frame, we performed a tension-compression fatigue test for composite specimens with different stacking sequences of the warp direction, fill direction, and $0^{\circ}/90^^{\circ}$ direction. We used a stress ratio (R) of -1, a frequency of 5 Hz, and an endurance limit of $10^7$. The fatigue strength of the composite bogie frame was evaluated by a Goodman diagram according to JIS E 4207. The results show that the fatigue life and strength of the lightweight composite bogie satisfy the requirements of JIS E 4207. Given its weight, its performance was better than that of a conventional metal bogie frame based on an SM490A steel material.

키워드

참고문헌

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피인용 문헌

  1. A study on evaluation of fatigue strength of a GFRP composite bogie frame for urban subway vehicles vol.22, pp.4, 2013, https://doi.org/10.1080/09243046.2013.795215
  2. Evaluation of structural integrity after ballast-flying impact damage of a GFRP lightweight bogie frame for railway vehicles vol.29, pp.6, 2015, https://doi.org/10.1007/s12206-015-0528-9
  3. An investigation on the fatigue behavior of DCB specimen bonded with aluminum foam at Mode III vol.30, pp.10, 2016, https://doi.org/10.1007/s12206-016-0915-x
  4. Change of Mechanical Properties of Injection-Molded Glass-Fiber-Reinforced Plastic (GFRP) According to Temperature and Water Absorption for Vehicle Weight Reduction vol.37, pp.2, 2013, https://doi.org/10.3795/KSME-A.2013.37.2.199
  5. A study on fracture behaviors of aluminum and CFRP jointed with pin vol.32, pp.8, 2018, https://doi.org/10.1007/s12206-018-0713-8