DOI QR코드

DOI QR Code

Assessment of Structural Stiffness and Fatigue Life in Self-Piercing Rivet(SPR) Joint of Car Body

차체 셀프-피어싱 리벳 접합의 구조강성 및 피로수명 평가

  • 김민건 (강원대학교 기계메카트로닉스공학부) ;
  • 이근찬 (강원대학교 대학원 기계메카트로닉스공학부) ;
  • 이병준 (부산대학교 기계기술연구소)
  • Published : 2004.08.01

Abstract

Recently, Self Piercing Rivet(SPR) has been spotlighted in the automotive industry as a substitutive resort of spot welding and has also been watched by the designer as lightening a car body due to their superior assembly processes. Fatigue behavior of SPR joint needs to be investigated experimentally and numerically to predict its structural stiffness and fatigue life. Testing of lap-shear specimens with various material combinations is performed to obtain the joining strength and the fatigue life of SPR connections. The simulation of SPR lap-shear specimens is also conducted to obtain the structural stiffness of SPR connections under different material combinations. A Finite element model of the SPR lap-shear specimen is developed using a FEMFAT SPR pre-processor. The fatigue lift of SPR specimen is predicted using a FEMFAT 4.4e based on the liner finite element analysis.

Keywords

SPR;Stiffness;Fatigue Life

References

  1. Booth, G. S., Olivier, C. A., Westgate, S. A., Liebrecht, F. and Braunling, S., 2000, 'Self-Piercing Riveted Joints and Resistance Spot Welded Joints in Steel and Aluminium,' SAE, Document Number 2000-01-2681
  2. Hiroyuki Iguchi, Yasuaki Ohmi, 2003, 'Joining Technologies for Aluminum Body-Improvement of Self-piercing Riveting,' JSAE 20037065
  3. Ronald Salzman, William Gryc, Hari Agrawal and Sreenivasa Bollimunta, 2003, 'Fatigue Life Reliability and Robustness of Aluminum Car Body U-Box Structure with Self-Piercing Riveted Joints,' SAE, Document Number 2003-01-0468
  4. Hari Agrawal, Wayne Li, Sreenivasa Bollimunta, Kesava Potty and Andrew Blows, 2003, 'Fatigue Life of Self Pierced Rivets(SPR) in Car Body,' SAE, Document Number 2003-01-0914
  5. Sohn, I. S., Bae, D. H., 1999, 'Statistical Investigation on Fatigue Life Prediction of the Spot Welded Lap Joint(I) : Application of Weibull Probability Distribution Function,' Transactions of the Korean Society of Automotive Engineers, Vol. 7 No.6, pp. 214-221
  6. Sohn, I. S., Bae, D. H., 1999, 'Statistical Investigation on Fatigue Life Prediction of the Spot Welded Lap Joint (II) : to Verity Reliability of Faigue Strength Estimation Method,' Transactions of the Korean Society of Automotive Engineers, Vol. 7 No.6, pp. 214-221
  7. Sohn, I. S., Bae, D. H., 1999, 'Fatigue Strength Evaluation of In-plane Bending Type Single Spot Welded Lap Joint by Strain Energy Density,' Transactions of the Korean Society of Mechanical Engineers (A), Vol. 23, No.9, pp. 1435-1441
  8. Chu, S.J., 2002, 'Study on the Prediction of Fatigue Life of Multi-Spot Welded Joints,' Transactions of the Korean Society of Mechanical Engineers (A), Vol. 26 No.3 pp. 471-478 https://doi.org/10.3795/KSME-A.2002.26.3.471
  9. Lee, K. Y., Kim, J. B., Choi, H. S., Woo, H. P., 1997, 'Strength Evaluation of Adhesive Bonded Joint for Light Weight Structure by Single-Lab Joint Test,' Transactions of the Korean Society of Automotive Engineers, Vol. 5 No.2, pp. 87-93
  10. Lee, K. Y., Kim, J. S., Kong, B. S., Woo, H. P., 1998, 'Strength Evaluation of Adhesive Bonded Joint for Car Body,' Transactions of the Korean Society of Automotive Engineers, Vol. 6 No.1, pp. 143-150
  11. Lim, D. H., Lee, B. W., Rhyu, H. H., Kim, H. K., 2003, 'An Experimental Study on the Strength Evaluation of Al-5052 Tensile-Shear Specimens Using a Mechanical Press Joining Method,' Transactions of the Korean Society of Machine Tool Engineers, Vol. 12 No.1, pp. 58-64
  12. Lee, Y. B., Park, Y. K., Chung, C. S., Kim, H. K., 'An Experimental Study on the Strength Evaluation of Mechanical Press Joint,' Transactions of the Korean Society of Mechanical Engineers (A), Vol. 24 No.2, pp. 438-447
  13. Brenner, C. E., Unger, B., Gaier, C., Steinwender, G. and Eichlseder, W., 2000, 'Fatigue Assessment of Welding Seams and Spot Joints Based on FEA,' SAE, Document Number 2000-01-0780
  14. Steyr-Dairnler-Push, 2003, 'FEMFAT4.4 User's Manual,' Magna-Steyr, FEMFAT SPOT
  15. Radaj, D., 1990, 'Design and Analysis of Fatigue Resistant Welded Structures,' Abington publishing, pp. 299-342
  16. Miner, M.A., 1945, 'Cumulative Damage in Fatigue,' ASME, Vol. 67, pp. A159-A164
  17. Jong, W. S., Bae, D. H., 2003, 'Fatigue Analysis of Spot-welded Multi-Lap Joint of STS301L Using the Maximum Stress,' Transactions of the Korean Society of Automotive Engineers, Vol. 16 No.6, pp. 101-107