Hostname: page-component-78c5997874-v9fdk Total loading time: 0 Render date: 2024-11-10T10:16:00.598Z Has data issue: false hasContentIssue false
  • English
  • Français

Evaluation of Crack Occurrence Probability of T-Shape Welded Structures

Published online by Cambridge University Press:  16 June 2011

Y. Hsu ,
W.-F. Wu  and
H.-T. Kuo
Y. Hsu
Affiliation:
General Education Center, Kainan University, Luchu, Taoyuan, Taiwan 33857, R.O.C.
W.-F. Wu*
Affiliation:
Department of Mechanical Engineering, National Taiwan University, Taipei, Taiwan 10617, R.O.C.
H.-T. Kuo
Affiliation:
Department of Mechanical Engineering, National Taiwan University, Taipei, Taiwan 10617, R.O.C.
*
**Professor, corresponding author
Get access

Abstract

Welded structures are vulnerable to fracture due to cracks, especially at the welds. To investigate the safety of T-Shape welded structures used in some construction sites, a method is proposed in this paper to evaluate the crack occurrence probabilities of the structures. Three major factors that affect the crack occurrence are taken into consideration. They are residual stress, diffusible hydrogen content and chemical composition of the weld metal. In the analysis, finite element analysis is performed to find the residual stress distribution of the structures. The uncertainties of diffusible hydrogen content and chemical composition are treated as random variables. The critical cooling time is found and utilized for evaluating the crack occurrence probability of the welded structure. Numerical results indicate that T-shape welded joints lead to higher residual stresses and higher crack occurrence probabilities in comparison with the traditional butt joints. Therefore, more attention should be paid to this kind of welded joints when they are used.

Keywords

Weld qualityCrackT-shape welded jointCrack occurrence probability
Type
Articles
Information
Journal of Mechanics , Volume 27 , Issue 2 , June 2011 , pp. 279 - 286
Copyright
Copyright © The Society of Theoretical and Applied Mechanics, R.O.C. 2011

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1. Free, J. A. and Goff, F. D. P., “Predicting Residual Stresses in Multi-Pass Weldments with the Finite Element Method,” Computers & Structures, 32, pp. 365–378 (1989).CrossRefGoogle Scholar
2. Li, Y. J., Wang, J., Chen, M. and Shen, X., “Finite Element Analysis of Residual Stress in the Welded Zone of a High Strength Steel,” Bulletin of Materials Science, 27, pp. 127–132 (2004).Google Scholar
3. Teng, T. L. and Chang, P. H., “Three Dimensional Thermo-Mechanical Analysis of Circumferentially Welded Thin-Walled Pipes,” International Journal of Pressure Vessels and Piping, 75, pp. 237–247 (1998).Google Scholar
4. Lindgren, L. E., “Finite Element Modelling and Simulation of Weldingm, Part 1, Increased Complexity,” Journal of Thermal Stresses, 24, pp. 141–192 (2001).Google Scholar
5. Wang, Y. X., Zhang, P., Hou, Z. G. and Li, C. Z., “Inherent Strain Method and Thermal Elastic-Plastic Analysis of Welding Deformation of a Thin-Wall Beam,” Journal of Mechanics, 24, pp. 301–309 (2008).CrossRefGoogle Scholar
6. Khraishi, T. and Jing, P. H., “Analytical Solutions for Crack Tip Plastic Zone Shape Using the von Mises and Tresca Yield Criteria: Effect of Crack Mode and Stress Condition,” Journal of Mechanics, 20, pp. 199–210 (2004).Google Scholar
7. Satoh, K. and Ueda, S., “Studies on Structural Restraint Severity Relating to Weld Cracking in Japan,” IIW Doc. X-808-76, 197626, International Institute of Welding (1976).Google Scholar
8. Okuda, N., Nishikawa, Y., Aoki, T., Goto, A. and Abe, T., “Hydrogen-Induced Cracking Susceptibility of Weld Metal,” IIW Doc. II-1072-86/II-A-86, International Institute of Welding (1986).Google Scholar
9. Nevasmma, P. and Karppi, R., “Implications on Controlling Factors Affecting Weld Metal Hydrogen Cold-Cracking in High-Strength Shielded-Metal Arc (SMAW) Multipass Welds Metal,” IIW Doc. IX- 1997-01, International Institute of Welding (1997).Google Scholar
10. Nevasmma, P., “Controlling Factors Affecting Hydrogen Cold Cracking in High-Strength Multi-Pass Weld Metals—Comparison of the Cracking Test Results between SMAW and SAW Welds,” IIW Doc. IX-2027-02, International Institute of Welding (2002).Google Scholar
11. Yurioka, N., “Predictive Methods for Prevention and Control of Hydrogen Assisted Cold Cracking,” IIW Doc. IX-1938-99, International Institute of Welding (1999).Google Scholar
12. Granjon, H., Fundamentals of Welding Metallurgy, Abington Publishing U.K. (1991).CrossRefGoogle Scholar
13. Kuo, H. T., Wei, R. C., Wu, W. F. and Yang, J. R., “Simulated Heat Affected Zone in ASTM A533-B Steel Plates under Low Heat Inputs,” Materials Chemistry and Physics, 117, pp. 471–477 (2009).Google Scholar
14. Yurioka, N., Suzuki, H., Ohshita, S. and Saito, S., “Determination of Necessary Preheating Temperature in Steel Welding,” Welding Journal, 62, pp. 147s–153s (1983).Google Scholar
15. Hart, P. H. M. and Watkinson, E., “Weld Metal Impact Test Ranks Cr-Mo Hydrogen Cracking Resistance,” Welding Journal, 54, pp. 288s–295s (1975).Google Scholar
16. Nevasmaa, P., “Predictive Model for the Prevention of Weld Metal Hydrogen Cracking in High-Strength Multipass Welds,” Ph.D. Dissertation, Department of Mechanical Engineering, University of Oulu, Oulu, Finland (2003).Google Scholar
17. ASTM, “Standard Specification for Pressure Vessel Plates, Alloy Steel, Quenched and Tempered, Manganese-Molybdenum and Manganese-Molybdenum- Nickel (A533/A533M-93),” American Society for Testing and Materials (1999).Google Scholar
18. Kou, S., Welding Metallurgy, John Willey & Sons U.S.A. (1987).Google Scholar
19. Suzuki, H. and Yurioka, N., “Prevention against Cold Cracking in Welding Steels,” Australian Welding Journal, 27, pp. 9–17 (1982).Google Scholar
20. Ebeling, C. E., An Introduction to Reliability and Maintainability Engineering, McGraw-Hill U.S.A. (1997).Google Scholar
21. Ang, A. H. S. and Tang, H. W., Probabilistic Concepts in Engineering Planning and Design, John Wiley & Sons U.S.A. (1984).Google Scholar
22. Hu, C. L., “Delayed Cracking Analysis in Welding Structures,” Master Thesis, Department of Mechanical Engineering, National Taiwan University, Taipei, Taiwan (2005).Google Scholar