Estimation of three‐dimensional stress intensity factor for structural ‘T’ details |
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| Authors: | M. Shohel C. Menzemer G.A. Arthur |
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| Affiliation: | 1. C&I Engineering, Inc., Louisville, KY, USA;2. Department of Civil Engineering, The University of Akron, Akron, OH, USA;3. Lockwood, Andrews and Newnam Inc., Dallas, TX, USA |
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| Abstract: | Three‐dimensional (3D) opening mode stress intensity factors (SIFs) for structural steel‐welded ‘T’ details were investigated by the finite element method. A 3D shape‐dependent correction factor is proposed for semi‐elliptical surface cracks. The aspect ratio (a/c) of a semi‐elliptical crack plays a key role in the approximation of 3D‐SIF values, and in the present study, it was estimated for a 3D crack analysis. The estimated 3D‐SIF was determined through a correlation between the a/c ratio and the two‐dimensional SIF for semi‐elliptical cracks in the thickness direction adjacent to the web‐flange junction of a welded ‘T’. The resulting equation can be used to estimate the 3D‐SIF values from the two‐dimensional SIF without much ambiguity. |
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| Keywords: | 3D and 2D stress intensity factor ANSYS constraint factor finite element method fracture mechanics T‐details |
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