Residual Stresses and Stress Intensity Factor Calculations in T-Welded Joints
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In welded joint, the residual stresses effect can be considered using the residual stress intensity factor (K res). In this study, K res is calculated using the analytic weight function method (WFM) and the polynomial distribution of residual stresses (σ res). The different residual stress distributions have been used analytically. It is to be emphasized that the current approach is little investigated. This is because the weight function has already been developed to calculate K for a crack that had already existed, and hence to calculate the stress distribution and stress intensity factor over the crack face. Therefore, the current approach calculates K res with σ res consideration for the crack which initiates and propagates until failure. The validity to use the proposed weight function has been shown. The results of K res have been compared with those obtained from FEM.
KeywordsFatigue crack growth Residual stress intensity factor SINTAP Superposition Weight function
The author would like to thankfully appreciate the support received from the Technische Universität Bergakademie Freiberg, Faculty of Materials Science and Technology, and Faculty of Geosciences, Geoengineering and Mining. The fruitful discussions with Prof. Gregory Glinka, University of Waterloo, Mechanical and Mechatronics Engineering, Canada, are gratefully acknowledged. The support from the Institute of International Education (IIE), USA is also gratefully appreciated.
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