Journal of the Korean Society for Heat Treatment (열처리공학회지)

The Korean Society for Heat Treatment (한국열처리공학회)
권호 표지
DOI QR코드

DOI QR Code

A Study on the Evaluation of Mechanical Characteristics for Tailor Welded Blank Panel

TWB 판넬의 기계적특성 평가에 관한 연구

  • Chun, Chang-Hwan (Dept. of Defense Science & Technology, Hoseo University) ;
  • Han, Chang-Suk (Dept. of Defense Science & Technology, Hoseo University)
  • 천창환 (호서대학교 국방과학기술학과) ;
  • 한창석 (호서대학교 국방과학기술학과)
  • Received : 2010.05.27
  • Accepted : 2010.06.10
  • Published : 2010.07.30
Download PDF
⟨ Previous Next ⟩

Abstract

There are many methods to reduce the weight and the cost of the automobile body, among them, Tailor Welded Blank (TWB) is new welding method applied to body structure. It is necessary to evaluate mechanical properties of TWB structures or sheets for the application to automobile body parts. In this study, the stiffness of T-type and L-type joint structures, composite of TWB panel, which simplified two portions of side structure in automobile body were investigated. Additionally, the fatigue properties of TWB panels were obtained. Two types of welding technologies, laser and mash seam welding, were used to join mild panels with different thickness. This results are compared with conventional structures. The results are as follows: 1) The stiffness of joint structures, composite of TWB panel, is approximately 17% higher than that of conventional ones. 2) The location of welding line in TWB had a effect on the in plane bending stiffness, but not on the out of plane bending stiffness. 3) In terms of welding technology type, the mash seam welding show higher stiffness than the laser welding for in plane bending stiffness. But minimal differences in both types are revealed for out of plane bending stiffness. 4) The fatigue strength, composite of TWB panel, is lower than that of base steel. It is thought that defects in the welding zone had the action of notch in the fatigue test.

Keywords

References

  1. S. B. Lee, J. R. Park and H. J. Yim : Inter. J. Auto. Tech., 3 (2002) 117.
  2. M. G. Kim, K. C. Lee and B. J. Lee : Trans. Kor. Soc. Mech. Eng. A., 28 (2004) 1174. https://doi.org/10.3795/KSME-A.2004.28.8.1174
  3. K. S. Lee, D. J. Kim, Y. H. Hahn and Y. J. Song : J. Kor. Soc. Tech. Plastics, 15 (2004) 289.
  4. K. Akihiro : J. Soc. Auto. Eng. Jpn., 59 (2005) 63.
  5. V. V. Bhaskar, R. G. Narayanan and K. Narasimhan : AIP Conf. Proc., 712 (2004) 863.
  6. R. G. Narayanan, V. V. Bhaskar and K. Narasimhan : AIP Conf. Proc., 712 (2004) 856.
  7. 포스코 : 중점 국가 연구 개발사업, 자동차 경량화 재료개발 워크숍, (1999) 7.
  8. 한국 공업 규격, "금속재료 인장 시험편", (KS B 0801 13B호 시험편) (1981).
  9. 일본 공업 규격, "금속 평판의 평면 굽힘 피로 시험 방법", (JIS Z 2275 1호 시험편) (1978).
  10. Y. Yamasaki, M. Yoshida, M. Kabasawa and O. One: 19th Biennial Congress IDDRA-Steel Metal in Forming Process, (1996) 4.
  11. 한수식, 박기철 : "고강도강의 부품화 적용을 위한 신성형 기술" 중점국가연구개발사업, 자동차 경량화 재료 개발사업 1차년도 연구결과보고서, (1999) 36.
  12. W. Prange and C. Schneider : J. Soc. Auto. Eng. Jpn., 46 (1992) 429.
  13. P. Andy, F. Erick and V. D. John : J. Soc. Auto. Eng. Jpn., 50 (1996) 99.

Cited by

  1. 핫프레스포밍 공정에서 내산화 코팅처리가 TWB 용접부 특성에 미치는 영향 vol.25, pp.6, 2012, https://doi.org/10.12656/jksht.2012.25.6.283