Experimental Investigation Into the Fatigue of Welded Stiffened 350WT Steel Plates Using Neutron Diffraction Method |
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| Authors: | B K C Yuen F Taheri M Gharghouri |
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| Affiliation: | 1. Department of Civil and Resource Engineering, Dalhousie University, 1360 Barrington Street, Halifax, NS, Canada B3J 1Z1;2. Canadian Neutron Beam Centre, Chalk River Laboratories, Building 459, Stn. 18, Chalk River, ON, Canada K0J 1J0 |
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| Abstract: | Abstract: The propagation of fatigue cracks under constant amplitude cyclic loading was studied in welded stiffened steel plates. The residual stresses in the stiffened plates were measured using the neutron diffraction strain‐scanning technique. The neutron diffraction measurements indicated that, in general, the residual stresses were tensile near the welded stiffeners and compressive between the stiffeners and ahead of the starter notch tips. Fatigue testing indicated that the fatigue crack growth rates of the stiffened plates were, in general, lower than that of a corresponding unstiffened plate, especially near the notch tips, where compressive residual stresses existed. An analytical method, using Green's function, was developed to predict the fatigue crack growth rates. Reasonable accuracy was obtained. |
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| Keywords: | fatigue crack growth Green's function neutron diffraction residual stresses welded stiffeners |
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