International Journal of Automotive Technology

The Korean Society of Automotive Engineers (한국자동차공학회)
권호 표지

CRASHWORTHINESS ASSESSMENT OF SIDE IMPACT OF AN AUTO-BODY WITH 60TRIP STEEL FOR SIDE MEMBERS

  • Huh, H. (Department of mechanical Engineering, Korea Advanced Institute of Science and Technology, Science Town) ;
  • Lim, J.H. (Department of mechanical Engineering, Korea Advanced Institute of Science and Technology, Science Town) ;
  • Song, J.H. (Department of mechanical Engineering, Korea Advanced Institute of Science and Technology, Science Town) ;
  • Lee, K.S. (Passenger Car Engineering & Research Center, Hyundai Motor Company) ;
  • Lee, Y.W. (Passenger Car Engineering & Research Center, Hyundai Motor Company) ;
  • Han, S.S. (Automotive Steels Research Center, POSCO)
  • Published : 2003.09.01
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Abstract

This paper is concerned with the energy absorption efficiency of auto-body side structures for the conventional steel and 60TRIP high strength steel. In order to evaluate the energy absorption efficiency, the dynamic crash analysis is carried out with the regulation of US-SINCAP. The analysis adopts the Johnson-Cook model for the dynamic material properties, which have been obtained from dynamic material tests. For the sake of the dynamic material properties, the analysis has been accurately peformed for the crashworthiness assesment. The analysis result provides deformed shapes, amounts of penetration and accelerations at several important points during crash. The result confirms that 60TRIP greatly improves the crashworthiness of the side members without sacrificing the weight and thus can be used for the light-weight design of an auto-body.

Keywords

References

  1. Huh, H. and Kang, W. J. (2002). Crash-worthiness assessment of thin-walled structures with the high-strength steel sheet, Int. J. Vehicle Design 30, 1/2, 121
  2. Huh, H., Kang, W. J. and Han, S. S. (2002). A Tension split Hopkinson bar for investigating the dynamic behavior of sheet metals, Experimental Mechanics 42, 1, 8-17 https://doi.org/10.1007/BF02411046
  3. Iwamoto, T., Tsuta, T. and Tomita, Y. (1998). Investi-gation on deformation mode dependence of strain-induced martensitic transformation in TRIP steels and modelling of transformation kinetics, Int. J. Mech. Sci. 40, 173-182 https://doi.org/10.1016/S0020-7403(97)00047-7
  4. Johnson, G. R. and Cook, W. H. (1983). A constitutive model and data for metals subjected to large strains, high strain rates and high temperatures, Proc. of 7th Int. Symposium on Ballistics, Hague, Netherlands, 115-120
  5. Kang, W. J., Cho, S. S., Huh, H. and Chung, D. T. (1999). Modified Johnson-Cook model for vehicle design, Int. J. Vehicle Design 21, 4/5, 424-435 https://doi.org/10.1504/IJVD.1999.005594
  6. Kang, W. J. and Huh, H. (2000). Crash analysis of auto-body structures considering the strain-rate hardening effect, Int. J. Automotive Technology 1, 1, 35-41
  7. LSTC (1999). LS-DYNA Keyword User's Manual, Nonlinear dynamic analysis of structures, Livermore Software Technology Co., Livermore, Califomia
  8. Mahadevan, K., Liang, P. and Fekete, J. (2000). Effect of strain rate in full vehicle frontal crash analysis, SAE PaperNo. 2000-01-0625
  9. Nakanishi, E., Tateno, H., Hishida, Y. and Shibata, K. (1998). New materials technology for achieving both crashworthiness and weight reduction using energy-absorbing steel with higher strain-rate sensitivity, SAE Paper No. 980953
  10. NHTSA (1990). Final Regulatory Impact Analysis, New requirements for passenger cars to meet a dynamic side impact test, Federal Motor VehicIe Safety Standard (FMVSS) 214, National Highway Traffic Safety Administration, Washington, D. C
  11. Ojima, Y., Shiroi, Y., Taniguchi, Y. and Kato, K. (1998). Application to body parts of high-strength steel sheet containing large volume fraction of retained austenite, SAE Paper No. 980954
  12. Yoshitake, A., Sato, K. and Hosoya, Y. (1998). A study on improving crashworthiness of automotive parts by using high strength steel sheets, SAE Paper No. 980382