International Conference on Offshore Mechanics and Arctic Engineering June 3-8, 2001, Rio de Janeiro, Brazil

• Main Authors: Omae Mat- Fatigue, C. D. Jang, Y. I. Kim
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Subjects: Arctic
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.21.1337; http://asosd.snu.ac.kr/publication/abs_003.pdf

In this study, fatigue test and crack propagation analysis of welded joints in ships and offshore structures were performed. The test models have two types of welded joints, T-joint and double plate. Test data is presented in S-N curves obtained by the Hot Spot Stress (HSS) approach. The S-N data for each length of crack were appraised to define the fatigue life of crack initiation and propagation. In the analysis of crack propagation of welded joints the effect of residual stresses is to be considered when evaluating effective Stress Intensity Factor (SIF) range. To analyze the residual stress field, thermal elastic-plastic analysis was performed considering temperature dependent material properties. The test results of propagation life and crack shape were compared with the data predicted from numerical analysis. Two sets of results were proven to be completely comparable.