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The Estimation of Semi Elliptical Surface Cracks Advancement via Fuzzy Logic
Abstract:This paper presented the results of an experimental investigation into the axial fatigue behavior of a 5086 aluminum alloy which have several notch-aspect ratios a0/c0 and notch thickness ratio a/t with semi-elliptical surface cracks. Tests were conducted in la b air for stress levels of 50 % of their yield strength. Experiments were carried out for various notch to thickness ratios. Crack growth rates of test specimens both in surface and depth directions were determined by using die penetration method. Fuzzy Logic method was used to predict the deep direction crack growth because the dept of the crack is considerably difficult to measure.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1058677Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 1250
 Wang X S, Lua X, Wang D H, Investigation of surface fatigue microcrack growth behavior of cast Mg-Al alloy, Materials Science and Engineering A364 (2004) 11-16.
 Deschamps A, Pe'ron S, Bre'chet Y, Ehrstro┬¿m J C, Poizat L, High temperature cleavage fracture in 5383 aluminum alloy, Materials Science and Engineering A319-321 (2001) 583-586.
 Sang-Won Han, Shinji Kumai, Akikazu Sato, Fatigue crack growth behavior in semi-liquid die-cast Al-7%Si-0.4%Mg alloys with fine effective grain structure, Materials Science and Engineering A308 (2001) 225-232.
 Levin M and Karlsson B, Crack initiation and growth during low-cycle fatigue of discontinuously reinforced metal-matrix composites, International Journal of Fatigue 15(5), 1993, Pages 377-387.
 Levin M and Karlsson B, Fatigue behaviour of a saffil-reinforced aluminium alloy (AA6061) International Journal of Fatigue, 16 (3) April 1994, Page 230.
 Venkateswara Rao K T, Bucci R J , Jata K V, Ritchie R O, A comparison of fatigue-crack propagation behavior in sheet and plate aluminumlithium alloys, Materials Science and Engineering A, 141(1) , 1991, Pages 39-48.
 Nishioka K, Hirakawa K, Kitaru I. Fatigue crack propagation behaviour of various steels, The Sumitomo Search, 1977; 39-55.
 Li K, X - Jin D, B-Yan D and Li P X, Effect of SiC particles on fatigue crack propagation in SiC/Al composites, Composites 1992; 23:54-58.
 Chiew S P, Lie S T, Lee C K, Huang Z W, Fatigue performance of cracked tubular T joints under combined loads. I: Experimental, Journal of Structural Engineering-ASCE, 130(4): 562-571 2004.
 LeTessier R, Coade R W, Geneve B, Sizing of cracks using the alternating current field measurement technique, International Journal of Pressure Vessels and Piping, 79 (8-10): 549-554 2002.
 Cerny I, The use of DCPD method for measurement of growth of cracks in large components at normal and elevated temperatures, Engineering Fracture Mechanics, 71 (4-6); 837-848 2004.
 Shcherbakov A , On figures of merit in the metrological provision of general-purpose ultrasonic flaw detectors, Russian Journal of Nondestructive Testing 40(3);163-169, 2004.
 Babout L, Ludwig W, Maire E, Buffière J Y, Damage assessment in metallic structural materials using high resolution synchrotron X-ray tomography, Nuclear Instruments and Methods in Physics Research B 200 (2003) 303-307.
 Piemjai M, Watanabe A, Iwasaki Y, Nakabayashi N, Effect of remaining demineralised dentine on dental microleakage accessed by a dye penetration: how to inhibit microleakage, Journal of Dentistry, 32 (6): 495- 501 AUG 2004.
 A. Zadeh, Fuzzy Sets, Fuzzy Logic, and Fuzzy Systems: Selected Papers of Lotfi A.Zadeh, G. J. Klir and B. Yuan, Eds., Advances in Fuzzy Systems -- Applications and Theory, Vol. 6, River Edge, NJ: World Scientific, 1996.
 Wilkinson J., Additional Advances in Fuzzy Logic Temperature Control, Conf. Record of the 1995 IEEE Industry Applications Conf., vol. 3, pp. 2721-2725, Oct. 1995.
 Raju IS, Newman JC. Stress-intensity factors for a wide range of semieliptical surface crack in finite-thickness plates, Engng Fract Mech, 1992;11: 817-829.
 Onal G, Axial Fatigue Crack Behavior of 5086 Al-Mg Alloy with Surface Crack, Ph.D. Thesis, Selcuk University, 2002.
 ROSS, T. J., "Fuzzy Logic with Engineering Applications", London, 1995
 MATLAB® Documentation (2004) Fuzzy Logic Toolbox Help, Version 7.0, Release 14, The MathWorks,