국내 열차하중 조건을 고려한 레일두부 횡방향 균열 진전 예측
Growth Prediction of Transverse Crack in Railhead with respect to load conditions of the Korean Railways
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초록
초음파검사 기술의 발전으로 레일내부 결함 발견율이 높아짐과 동시에 레일내부 결함에 대한 진전예측과 이를 통한 관리방안 수립은 선로유지관리에 있어 매우 중요하다. 본 연구에서는 파괴역학 이론을 기반으로 한 프로그램을 이용하였으며, 이를 이용하여 국내 고속철도, 일반철도, 도시철도의 동적하중 조건을 고려한 레일두부 횡방향 균열 진전 예측을 수행하였다. 해석결과, 레일두부 횡방향 균열 진전에 의한 피로수명은 도시철도가 가장 높았으며, 일반철도와 고속철도는 비슷한 수준으로 평가되었다. 또한, 선로마다 다른 연간 통과톤수에 대한 정밀한 예측을 통해 레일결함 크기를 관리할 필요가 있다.
Abstract
As of recent trends, the importance of track management measures is emphasized as the development of ultrasonic inspection technology and propagation prediction of defects inside the rail allows more accurate and frequent detection of defects inside rails. In this study, a program based on the theory of fracture mechanics is used, and the propagation prediction of transverse cracks in the railhead considering the dynamic loading conditions of high-speed railway, conventional railway and urban railway in Korea is conducted. Results of the study showed that fatigue life caused by the growth of the transverse crack in the railhead was the highest in the urban railway, while the conventional railway and the high-speed railway were assessed at a similar level. In addition, it is necessary to control the size of the crack by precisely predicting the number of annual passing tonnages different from track to track.
참고문헌 (28)
- P. Paris, "A critical analysis of crack propagation laws", Journal of Basic Engineering, 85(4), pp.528~533 (1963)
- N. E. Frost, "A fracture mechanics analysis of fatigue crack growth data for various materials", Engineering Fracture Mechanics, 3(2), pp.109~126 (1971)
- R. Roberts, "The effect of mean stress on fatigue crack propagation in plate under extension and bending", Journal of Basic Engineering, 89(4), pp.885~892 (1967)
- R. G. Forman, "Numerical analysis of crack propagation in cyclic-loaded structures", Journal of Basic Engineering, 89(3), pp.459~463 (1967)
- The effect of stress ratio during crack propagation and fatigue for 2024-T3 and 7075-T6, "E.K. Walker", ASTM, 1~15, pp.ASTM STP462 (1970)
- The significance of fatigue crack closure, "W. Elber", ASTM, 230~242, pp.ASTM STP496 (1971)
- S. Pearson, "Initiation of fatigue cracks in commercial aluminum alloys and the subsequent propagation of very short cracks", Engineering Fracture Mechanics, 7(2), pp.235~247 (1975)
- Y. Liu, "Fatigue crack initiation life prediction of railroad wheels", International Journal of Fatigue, 28(7), pp.747~756 (2006)
- Y. Liu, "Multiaxial high-cycle fatigue criterion and life prediction for metals", International Journal of Fatigue, 27(7), pp.790~800 (2005)
- D. Y. Sung, "Fatigue life evaluation of continuous welded rails on concrete slab track in Korea high-speed railway", Advances in Structural Engineering, 21(13), pp.1990~2004 (2018)
- 양태경, "열차제동하중이 레일표면열화에 미치는 영향", 한국도시철도학회논문집, 5(1), pp.811~818 (2017), 한국도시철도학회[DOI]
- 성덕룡, "곡선부 차륜", 레일 접촉압력에 따른 레일마모진전 경향 분석, 2017, pp.20(4), 512~520[DOI]
- C. S. Kim, "A study on the integrity assessment of the rail steel under mixed mode load", Ph.D, pp.2002
- J.K. Kim, "Fatigue crack growth behavior of rail steel under mode I and mixed mode loadings", Materials Science and Engineering, A338, pp.191~201 (2002)
- A. A. Heshmat, "Fracture and fatigue crack growth analysis of rail steels", Journal of Mechanics and Structures, 2(2), pp.335~346 (2007)
- G.C. Sih, "Handbook of Stress Intensity Factors" (1973), Institute of Fracture and Solid Mechanics, Lehigh University, Bethlehem
- Correlations Between Rail Defect Growth Data and Engineering Analyses, Part II:Field Tests, "D. Y. Jeong", UIC, 2002
- Analytical Modelling of Rail Defects and Its Applications to Rail Defect Management, "D.Y. Jeong", UIC, 2002
- Correlations Between Rail Defect Growth Data and Engineering Analyses, Part I:Laboratory Tests, "D. Y. Jeong", UIC, 2003
- Development of management criteria and growth predict model for rail defects: 3rd report, "D.Y. Sung", Daewon University College, ~, pp.Research Report(18RTRPB113566-03) (2018)
- S. S. Kim, "The prediction models for longitudinal fatigue crack growth and management criteria in rail", Ph.D., pp.2019
- D.Y. Sung, "Program for Prediction of Crack Propagation in Railhead, certificate of copyright registration(C-2018-027756)", ~ (2018)
- Korea Rail Network Authority, "Ballast track structure, KR-C 14030", 22~25 (2014)
- Track, "Bridge interaction analysis", Korea Rail Network Authority, 2014, pp.7~8, KR-C 08080
- D. Y. Sung, "The fatigue life evaluation of rail by analysis of the vehicle", track interaction, Seoul National University of Science and Technology, 2010
- International Union of Railways, "Treatment of rail defects:1st edition, UIC CODE 725R", ~ (2007)
- Condition Evaluation and Renewal Method of the track in the First phase of Seoul-Pusan High-Speed Railway, , Korea Rail Network Authority, ~ (2017)
- "Accumulative Passing Tonnage", Seoul Metro, ~ (2018)