Accuracy of numerical methods for assessment of fatigue crack growth in welded joints
Abstract
Fatigue cracks could be detected in various structures, subjected to cyclic loading, during the inspection. In order to predict remaining fatigue life, various numerical methods can be used. At the very beginning, the stress intensity factor (SIF), describing the stress field in the vicinity of the crack tip, should be determined. There are a few methods (and formulas in some cases) for SIF determination. Then the equation for crack growth rate should be chosen and solved by using one of the numerical methods. The difference in final results of the assessment as a consequence of different applied methods and formulas in this procedure for welded joints is considered in this paper.
Keywords
SIF determination, fatigue life assessment, welded joints
Acknowledgements
The paper was originally published in the Proceedings of the Conference Welding 2014, held at Bor Lake, Serbia, from June 4 to 7, 2014, where it was also presented.
References
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