Stress intensity factor solutions for semi-elliptical weld-toe cracks in T-butt geometries
Bowness, D. and Lee, M.M.K. (1996) Stress intensity factor solutions for semi-elliptical weld-toe cracks in T-butt geometries. Fatigue & Fracture of Engineering Materials & Structures, 19, (6), 787-797. (doi:10.1111/j.1460-2695.1996.tb01323.x).
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Description/Abstract
Weld toe magnification factors are widely used in the evaluation of stress intensity factors for cracks in welded structures. Traditionally, the weld magnification factor has been determined from 2-D plane strain models containing edge cracks. However, it has long been recognised that a semi-elliptical weld toe crack cannot be accurately represented by a 2-D approximation due to the 3-D nature of the geometry. As a consequence, some recent research has been carried out using 3-D numerical modelling, which highlights the limitations of the 2-D approach. Nevertheless, 3-D solutions are still scarce and are of limited validity due to the difficulties associated with creating the numerical models. This paper reports the most extensive 3-D numerical investigation of semi-elliptical cracks in T-butt geometries to date. Based on the numerical results, new and accurate equations for weld magnification factors were derived, which quantify the 3-D effects present and emphasise the importance of the attachment. The results obtained from these equations are then used in an assessment of existing solutions.
| Item Type: | Article |
|---|---|
| ISSNs: | 8756-758X (print) 1460-2695 (electronic) |
| Keywords: | stress intensity factors, weld toe cracks, finite elements, t-butts, fatigue assessment |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) Q Science > QC Physics |
| Divisions: | University Structure - Pre August 2011 > School of Civil Engineering and the Environment |
| Item ID: | 75372 |
| Date Deposited: | 11 Mar 2010 |
| Last Modified: | 25 Apr 2013 20:46 |
| Contributors: | Bowness, D. (Author) Lee, M.M.K. (Author) |
| Date: | June 1996 |
| Status: | Published |
| URI: | http://eprints.soton.ac.uk/id/eprint/75372 |
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