Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Stress intensity factors for semi-elliptical surface cracks in plate-to-plate butt welds with parallel misalignment of same thickness
AbstractA 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.
HighlightsNewly developed mesh generator is used to generate finite element (FE) models.3-D FE analyses are performed to determine dimensionless stress intensity factors (Y) of misaligned butt welds.The assessment equation from BS 7910:2013 cannot predict accurately the Y values through the whole crack depth ratios.New Y equations for misaligned butt welds are proposed using multiple regression analyses.
Stress intensity factors for semi-elliptical surface cracks in plate-to-plate butt welds with parallel misalignment of same thickness
AbstractA 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.
HighlightsNewly developed mesh generator is used to generate finite element (FE) models.3-D FE analyses are performed to determine dimensionless stress intensity factors (Y) of misaligned butt welds.The assessment equation from BS 7910:2013 cannot predict accurately the Y values through the whole crack depth ratios.New Y equations for misaligned butt welds are proposed using multiple regression analyses.
Stress intensity factors for semi-elliptical surface cracks in plate-to-plate butt welds with parallel misalignment of same thickness
Zhao, H.S. (Autor:in) / Lie, S.T. (Autor:in) / Zhang, Y. (Autor:in)
Marine Structures ; 53 ; 148-163
16.02.2017
16 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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