Durability Evaluation of a Composite Carbody for Korean Tilting Train under Repeated Loadings

반복하중을 받는 틸팅열차용 복합재 차체구조의 내구성 평가

  • 정종철 ((주)한국화이바 차량사업부) ;
  • 서승일 (한국철도기술연구원 기존철도사업단) ;
  • 김정석 (한국철도기술연구원, 기존철도사업단)
  • Published : 2007.02.28

Abstract

This rafer explains a durability test of a large train car body made of carbon/epoxy composite material. The composite car body with the length of 23m was manufactured as a sandwich structure composed of an aluminum honeycomb core and CF1263 woven fabric carbon/epoxy faces. In order to evaluate durability of the composite car body, it was excited by two 500kN capacity hydraulic actuators installed underneath the body bolster. The natural frequency of the composite car body under full weight condition was found to be 4.33Hz. Based on this result, the excitation frequency and displacement of 5Hz and ${\pm}1.0mm$, respectively, were used as inputs for the durability test. The test was conducted for $2{\times}10^6$ cycles. During the test, the nondestructive tests using X-ray radiography and dye penetration method was performed to determine the presence of the cracks. Upon completion of the test, no cracks were found.

References

  1. G. Belingardi, M. P. Cavtorta and R. Duella, 2003, 'Material Characterization of a Composite-Foam Sandwich for the Front Structure of a High Speed Train,' Composite Structures, Vol. 61, pp. 13-25 https://doi.org/10.1016/S0263-8223(03)00028-X
  2. A. M. Harte, J. F. Mcnamara and I. D. Roddy , 2004, 'A Multilevel Approach to the Optimization of a Composite Light rail Vehicle Bodyshell,' Composite Structures, Vol. 63, pp. 447-453 https://doi.org/10.1016/S0263-8223(03)00193-4
  3. 김정석, 정종철, 한정우, 이상진, 김승철, 서승일, '한국형 틸팅열차용 복합재 차체의 하중적재에 따른 구조적 특성 고찰,' 한국철도학회논문집, 제 9권, 제 3호, pp. 251-256, 2006
  4. 김정석, 정종철, 조세현, 서승일, '복합재 철도차량 차체 고유진 동수에 대한 해석 및 시험적 연구,' 대한기계학회논문집 A권, 제 30권, 제 4호, pp. 473-480, 2006 https://doi.org/10.3795/KSME-A.2006.30.4.473
  5. Kim J. S. and Cheong S. K., 'A Study on the Low Velocity Impact Response of Laminates for Composite Railway Bodyshells,' Composite Structures, Vol. 77, pp. 484-492, 2007 https://doi.org/10.1016/j.compstruct.2005.08.020
  6. Japanese Industrial Standard (JIS) E 7105, Test Methods for Static Load of Body Structures of Railway Rolling Stock, 1994
  7. Kim J. S., Cheong J. C. and Lee S. J., 'Numerical and Experimental Studies on the Deformational Behavior of a Composite Train Carbody of the Korean Tilting Train,' Composite Structures, Accepted for Publication
  8. Kim J. S., Lee S. J. and Shin K. B., 2006, 'Manufacturing and Structural Safety Evaluation of a Composite Train Carbody,' Composite Structures, Vol. 79, pp. 468-476, 2007
  9. Kim J. S. and Cheong J. C., 'Natural Frequency Evaluation of a composite Train Carbody with Length of 23m,' Composite Science and Technology, Vol. 66, pp. 2272-2283, 2006 https://doi.org/10.1016/j.compscitech.2005.11.036
  10. Lee J. H., Cheong S. K., Kim J. S. and Eum K. Y., 'Impact Characteristics and Damage Detection of Woven Carbon/Epoxy laminates for Car Body Structures of a Tilting Train,' Key Engineering Materials, Vol. 321-323, pp. 942-945, 2006