Stress intensity factors for semi-elliptical surface cracks in plate-to-plate butt welds with parallel misalignment of same thickness
A set of fatigue and fracture assessment equations had been incorporated into British Standard 7910:2013 (BS 7910:2013) to estimate the effect of misalignment for various geometric configurations containing a surface crack. In this study, extensive 3-D finite element (FE) analyses are carried out to...
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| Main Authors: | , , |
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| 格式: | Article |
| 語言: | English |
| 出版: |
2017
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| 主題: | |
| 在線閱讀: | https://hdl.handle.net/10356/82955 http://hdl.handle.net/10220/42355 |
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| 總結: | A set of fatigue and fracture assessment equations had been incorporated into British Standard 7910:2013 (BS 7910:2013) to estimate the effect of misalignment for various geometric configurations containing a surface crack. In this study, extensive 3-D finite element (FE) analyses are carried out to determine the dimensionless stress intensity factors (Y) at the crack deepest point and crack ends of plate-to-plate butt welds with parallel misalignment of same thickness. In comparison to BS 7910:2013, it is observed that the assessment equations underestimate the Y values for shallow cracks and overestimate the corresponding values for deeper cracks with percentage differences in values being as high as 82% and 12%, respectively. New Y equations for misaligned butt welds are proposed using multiple regression analyses. |
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