Journal of the Korea Academia-Industrial cooperation Society (한국산학기술학회논문지)

The Korea Academia-Industrial cooperation Society (한국산학기술학회)
권호 표지
DOI QR코드

DOI QR Code

A Experimental Estimation of Thermal Fatigue at Polyethylene Boat

폴리에틸렌 보트의 열피로 손상의 실험적 평가

  • Cho, Seok Swoo (Department of Vehicle Engineering, Kangwon National University)
  • 조석수 (강원대학교 자동차공학과)
  • Received : 2012.07.23
  • Accepted : 2013.06.07
  • Published : 2013.06.30
Download PDF
⟨ Previous Next ⟩

Abstract

Material of boat hull has been used mainly with FRP composite materials until now. FRP boat hull manufacturing began to be restricted after the 2000's under international regulation on ocean environment safety. Shipyard on a small scale has manufactured polyethylene canoe and kayak hulls. Polyethylene has the melting point lower than the existing hull materials. Thermal stress occurs on outer hull surface when the polyethylene boat hull is exposed to sunlight. If it happens everyday, boat hull undergoes fatigue damage due to thermal fatigue. Therefore, this study presents the statistical fatigue life estimation on the HDPE boat hull subject to repeated thermal stress under three point bending condition.

2000년 이후 FRP 보트 선체 제작에 대한 국제적 법적 규제가 강화되고 있다. 본 연구에서는 보트 선체 재료로 폴리에틸렌을 제안하였다. 폴리에틸렌은 저융점 재료로서 보트가 야외에 장기간 노출되는 경우 심각한 열피로를 받을 수 있다. 고밀도 폴리에틸렌 보트 선체에 대한 열적 내구성을 실험적으로 평가하기 위하여 삼점굽힘하중조건하에서 변형률 게이지를 이용하여 열응력을 측정한 뒤 열응력 데이터를 기초로 통계학적으로 열피로 손상을 분석하였다.

Keywords

References

  1. H.B.Moraes, J.M.Vasconcellos and P.M.Almeida, "Multiple Criteria Optimization applied to High Speed Catamaran Preliminary Design", Ocean Engineering, Vol. 34, pp. 133-147, 2007. DOI: http://dx.doi.org/10.1016/j.oceaneng.2005.12.009
  2. J.H.Lee, B.I.Chun, S.O.Song, K.K.Kim, "A Study on the Three-Dimensional Steady State Temperature Distribution and BOR Calculation Program", Proc. of the SREK 1998 Summer Annual Meeting, pp. 1224-1228, 1998.
  3. B.I.Chun, Y.M.Kim, K.K.Kim, "A Study on the Computation of Hull Temperature Distribution and Boil Off Ratio of MRV Type LNG carrier", Trans. of the KSME(A), Vol. 18, No. 4, pp. 986-996, 1994. DOI: http://dx.doi.org/10.5762/KAIS.2012.13.4.1480
  4. D.W.Lee, S.S.Cho, "Failure Load Prediction of Tunnel Support using DOE and Optimization Algorithm", JKAICS, Vol.13, No.4, pp.1480-1487, 2012. https://doi.org/10.5762/KAIS.2012.13.4.1480
  5. D.W.Lee, J.N.Kim, S.S.Cho, "A Study on Safety Estimation of Railroad Wheel", JKAICS, Vol.11 No.4, pp.1178-1185, 2010. https://doi.org/10.5762/KAIS.2010.11.4.1178
  6. ISO 12215-5, "Small Craft-Hull Construction and Scantlings-Part 5: Design Pressures for Monohulls, Design Stresses, Scantlings Determination", ISO, pp.1-107, 2008.
  7. Y.H. Yeom, pp. 243-248, "Material Test Method", Dong Myeong Press, Seoul, 1989.
  8. J.P.Holman, "Experimental Method for Engineers", pp. 397-413, McGraw-Hill Book Co., Singapore, 1989.
  9. S.G.Seo, "Reliability Analysis using MINITAB R14.2", pp. 142-153, Eretech Co., Gunpo city in South Korea, 2006.
  10. S.G.Seo, "Reliability Analysis using MINITAB R14.2", pp. 207-213, Eretech Co., Gunpo city in South Korea, 2006.