- Title
- Modified stress intensity factor equations for semi-elliptical surface cracks in finite thickness and width plates
- Creator
- Peng, Yang; Tong, Lewei; Zhao, Xiao; Xiao, Zhigang
- Date
- 2011
- Type
- Text; Conference paper
- Identifier
- http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/161122
- Identifier
- vital:12375
- Identifier
-
https://doi.org/10.1016/j.proeng.2011.07.327
- Abstract
- Weld defects and severe variation of shape near the welds cause high stress concentration at weld toes or weld roots. This high stress concentration reduces fatigue lives of welded structures. A stress intensity factor (SIF) which includes this effect increases the accuracy of fatigue lives prediction. A magnification factor is commonly used to multiply the SIF of semi-elliptical surface cracks to account for the stress concentration effect in welded connections. Yamada and Hirt model is one of these methods. Comparison between Yamada & Hirt SIF equations and Newman & Raju SIF equations are applied to SIF of semi-elliptical surface cracks. The results suggest that Yamada & Hirt SIF equations are valid when the crack aspect ratio is less than 0.6. New empirical SIF equations are developed based on Yamada & Hirt SIF equations. The newly derived SIF equations are verified by comparing with experimental data.
- Relation
- The Twelfth East Asia-Pacific Conference on Structural Engineering and Construction p. 2601-2608
- Rights
- © 2011 Published by Elsevier Ltd.
- Rights
- Open Access
- Rights
- This metadata is freely available under a CCO license
- Subject
- 0905 Civil Engineering; Stress intensity factor; Surface crack; Crack propagation; Fatigue; Fracture mechanics
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