STRESS INTENSITY FACTORS OF H-SHAPED STEEL BEAMS WITH SYMMETRICAL FLANGE CRACKS
Article Sidebar
Main Article Content
Abstract
This paper presents the finite element analysis of stress intensity factor (SIF) values for I-shaped steel beams with symmetric flange cracks subjected to tension or bending. A comparison with the previous study showed that the current analysis results are in good agreement with the previous results. A parametric study showed that the flange-to-web area ratio affects the SIF values at both flange and web crack tips, while the depth-to-width ratio affects only the SIF value at the web crack tip. In addition, the SIF equations are proposed for I-shaped steel beams with symmetric flange cracks subjected to tension or bending. The SIF equations were developed by analyzing the database of SIF values obtained from the finite element analysis with the genetic programming.
Article Details
The published articles are copyright of the Engineering Journal of Research and Development, The Engineering Institute of Thailand Under H.M. The King's Patronage (EIT).
References
Roylance, D. Introduction to fracture mechanics, Department of Materials Science and Engineering
Massachusetts Institute of Technology, Cambridge, MA02139, 2001.
AASHTO (LRFD), AASHTO LRFD Bridge Design Specifications, Washington, D.C ,American: American Association of State Highway and Transportation Officials, 2008.
AASHTO, The Manual For Bridge Evaluation (2nd ed.), Washinton DC,American: Association of State Highway and Transportation Officials, 2011.
Fisher, J. W., Frank, K. H., Hirt, M. A. and McNamee, B. M, Effects of weldments on fatigue strength of steel beams, Washington: NCHRP-Report 102, Highway Research Board, National Research Council, 1970, p. No. 102.
Albrecht, P. Lenwari, A. and Feng, D, Stress Intensity Factors for Structural Steel I-beams, Journal of Structural Engineering,ASCE, 2008, 134, pp. 421-429.
Jirapong, K. Fracture Mechanics, Bangkok: Chulalongkorn University Press, 2010.
Dunn, M. L., Suwito, W., Hunter, B, Stress Intensity for Cracked I-beams, Engineering Fracture Mechanics, 1997, 57(6), pp. 609-615, 1997.
Heuristiclab, Genetic Programming Regression And Classification, Heuristic Optimization Software Systems - Modeling of Heuristic Optimization Algorithms in the HeuristicLab Software Environment, 2009.
Tada, H., Paris, P. C., and Irwin, G. R, The stress analysis of cracks handbook, Hellertown: Del Research Corporation, 1973.
Shih, C. Moran, B. and Nakamura, T, Energy release rate along a three-dimensional crack front in a thermally stressed body, International Journal of Fracture, 1986, 30, pp. 79–102.
Sette, S; Boullart, L, Genetic programming: principles and applications, Engineering Applications of Artificial Intelligence, 2001, 14(6), pp. 727-736.
Do, B. and Lenwari, A. Optimization of Fiber-Reinforced Polymer Patches for Repairing Fatigue Cracks in Steel Plates Using a Genetic Algorithm, Journal of Composites for Construction,ASCE, 2020, 24(2), pp. 1-15.