Acta Metallurgica Sinica (English Letters) >
Residual stress relaxation in typical weld joints and its effect on fatigue and crack growth
Received date: 2008-08-25
Revised date: 2008-11-05
Online published: 2009-10-10
Many factors influence the fatigue and crack growth behavior of welded joints. Some structures often undergo fairly large static loading before they enter service or variable amplitude cyclic loading when they are in service. The combined effect of both applied stress and high initial residual stress is expected to cause the residual stresses relaxation. Only a few papers seem to deal with appropriate procedures for fatigue analysis and crack growth by considering the combined effect of variable amplitude cyclic loading with residual stresses relaxation. In this article, some typical welded connections in ship-shaped structures are investigated with 3-D elastic-plastic finite element analysis. The effect of residual stress relaxation, initial residual stress, and the applied load after variable amplitude cyclic loading is revealed, and a formula for predicting the residual stress at hot spot quantitatively is proposed. Based on the formula, an improved fatigue procedure is introduced. Moreover, crack growth of typical weld joints considering residual stresses relaxation is studied.
Liangbi LI , Zhengquan WAN , Zili WANG , Chunyan JI . Residual stress relaxation in typical weld joints and its effect on fatigue and crack growth[J]. Acta Metallurgica Sinica (English Letters), 2009 , 22(3) : 202 -210 . DOI: 10.1016/S1006-7191(08)60090-3
[1] J. Eckerlid and A. Ulfvarson, Marine Struct 8(1995)385.
[2] K. Iida, S. Yamamoto and M. Takanashi, Weld World 39(1997)39.
[3] M. Takanashi, K. Kamata and K. Lida, Weld World 44(2000)2.
[4] T.K. Lee, Y.Y. Nam, S.H. Han and B.C. Shin, Twelfth ISOPE (Japan, 2002).
[5] S. Han, T. Lee and B. Shin, Steel Res 73(2002)414.
[6] J.W. Han, S.H. Han, B.C. Shin and J.H. Kim, Fourteenth ISOPE (France, 2004).
[7] B. Zhang and T. Moan, OMAE Conf (Halkidiki, Greece, 2005).
[8] W.S. Kim, Y. Tomita, K. Hashimoto and N. Osawa, Seventh ISOPE (Houston, USA, 1997).
[9] V. Dattoma, M.D. Giorgi and R. Nobile, J Strain Anal Eng Design 39(2004)663.
[10] W. Fricke, Proc 11th ISOPE (Stavanger, Norway,2002).
[11] S.W. Kim and I. Lotsberg, J Offshore Mech Arctic Eng 127(2005)663.
[12] M.G. Yuan and Y. Ueda, J Eng Mater Technol 118(2006)229.
[13] FPSO JIP-Fatigue Capacity, 2000. Fatigue Test of Typical Weld Joints, Hyundai Heavy Industries. Co., Ltd.
/
| 〈 |
|
〉 |
WeChat