Browse > Article
http://dx.doi.org/10.3795/KSME-A.2004.28.9.1328

Fatigue Life Evaluation Model of Welded Joints With Residual Stress  

Goo, Byeong-Choon (한국철도기술연구원 차량연구본부)
Yang, Sung-Yong (한국철도기술연구원 차량연구본부)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.28, no.9, 2004 , pp. 1328-1336 More about this Journal
Abstract
According to our fatigue tests carried out at 20 Hz, R=0.1 on transversely butt-welded joints, fatigue strengths of as-welded specimens, that is, specimens having residual stress are higher than those of annealed specimens in short life range, but vice verse in long life range. This behavior seems to be concerned mainly with residual stress relaxation by applied loading. After analyzing the welding process, we conducted finite element analysis to quantify the degree of residual stress relaxation. By taking into account residual stress relaxation, modified Goodman diagram, and nominal stress, we evaluated the fatigue life of the welded joint from the S-N curve for the parent material. The estimated results are in a good agreement with the experimental results.
Keywords
Fatigue Life; Finite Element Analysis; Nominal Stress; Residual Stress Relaxation;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 Fatigue Life Evaluation of Various Welding Details based on Notch Strain Approach /
[ Han, J. W.;Han, S. H.;Shin, B. C.;Kim, J. H. ] / Proceedings of the Seventeenth Conferene on Mechanical Behaviors of Materials
2 Han, S. H., Han, J. W., Shin, B. C. and J. H. Kim, 2003, 'Fatigue Life Estimation of Welded Components Considering Welding Residual Stress Relaxation and Its Mean Stress Effect,' Trans. of the KSME A, Vol. 27, No. 1, pp. 175-182
3 Vormwald, M. and Seeger, T., 1987, 'Crack Initiation Life Estimations for Notched Specimens with Residual Stresses Based on Local Strains,' Residual stresses in Science and Technology, pp. 743-750
4 Takanashi, M. and Iida, K., 2001, 'Relaxation of Welding Residual Stresses by Reversed and Repeated Loadings,' Japanese Welding Society, Vol. 19, No. 1, pp. 129-139   DOI
5 Han, S. H., Han, J. W. and Shin B. C, 1998, 'Fatigue Strength Estimation and Fatigue Design of Welded Members under Hot-Spot Stress Concept,' Trans. of the KSME A, Vol. 22, No. 11, pp. 2072-2083
6 Reemsnyder, H., 1981, 'Evaluating the Effect of Residual Stresses on Notched Fatigue Resistance,' Experimentation and Design in Fatigue, pp. 273-295
7 Stephens, R. I., Fatemi, A., Stephens, R. R. and Fuchs, H. O., 2001, Metal Fatigue in Engineering, John Wiley & Sons, Inc., pp. 196-205
8 Lawrence, F. V., Burk, J. D. and Yung, J. Y., 1982, 'Influence of Residual Stress on the Predicted Fatigue Life of Weldments,' ASTM STP 776, pp. 33-43
9 Han, J. W., Han, S. H., Shin, B. C. and Kim, J. H., 2003, 'Fatigue Life Evaluation of Various Welding Details based on Notch Strain Approach,' Proceedings of the Seventeenth Conference on Mechanical Behaviors of Materials, The Korean Institute of Metals and Materials, pp. 365-372