The paper analyzes the fatigue crack growth of knuckle detail typical of tankers. An approach for evaluation of the fatigue life based on fracture mechanics is presented, where a Paris-Erdogan crack-growth law is applied. A geometry correction function is determined from fatigue test data. A closed-form equation is proposed for fatigue life estimation. The results obtained from a fatigue test and the calculated fatigue lives are compared.
Issue Section:
Technical Papers
1.
Kozljakov, V. V., 1992, “An Analysis of Structural Peculiarities and Causes of Severe Hull Damages of Bulk Carriers,” Tankers and Ro-Ro Ship, International Congress on Tanker and Bulk Carriers the Way Ahead, London, RINA.
2.
Fricke, W., and Petershagen, H., 1992, “Detail Design of Welded Ship Structures Based on Hot-Spot Stresses,” Proceedings of the Practical Design of Ships and Mobile Units, J. B. Caldwell and G. Ward, 2, Elsevier Science Limited, pp. 1087–100.
3.
Yonkeya, T., and Kumano, A., 1993, “Hull Cracking of Very Large Ship Structures,” Proceedings of the 4th International Symposium on Integrity of Offshore Structures, Glasgow.
4.
Bureau Veritas, 1996, “Fatigue Strength of Welded Ship Structures,” NI393 DSM ROIE, Paris, France.
5.
Det norske Veritas, 1998, “Fatigue Assessment of Ships Structures,” Classification Notes, Hovik, Norway.
6.
Germanischer Lloyd, 1998, “GL-Technology,” Fatigue Strength of Ship Structures, I and II.
7.
Matoba, M., and Kawasani, M., 1983, “Evaluation of Fatigue Strength of Welded Steel Structures-Hull Members,” Hollow Section Joints, Piping and Vessel Joints, IIW-XIII-1082-83.
8.
Almar-Naess, A., 1985, “Fatigue Handbook,” Offshore Steel Structures, Norway, Tapir.
9.
Yuasa, M., and Watanabe, T., 1999, “Fatigue Strength of Bilge Knuckle Structure,” NK Technical Bulletin, pp. 17–32.
10.
Guedes Soares, C., Garbatov, Y., and von Selle, H., 2002, “Fatigue Damage Assessment of Ship Structures Based on the Long-Term Distribution of Local Stresses,” accepted for publication in International Shipbuilding Progress.
11.
Janssen, G. T. M., 2000, “Fatigue Based Design Rules for the Application of High Tensile Steel in Ships,” Proceedings of the Seventh International Marine Design Conference, Kyongju, Korea, pp. 317–28.
12.
Garbatov, Y., Rudan, S., and Guedes Soares, C., 2000, “Fatigue Strength Assessment of Ship Knuckle Details,” Proceedings of the 13th Congress on International Maritime Association of Mediterranean (IMAM’00), 2, pp. 103–10.
13.
Rudan, S., Garbatov, Y., and Guedes Soares, C., 2000, “Finite Element Study of Stress Concentration Factors in Ship Knuckle Details,” Proceedings of the 3rd International Congress of Croatian Society of Mechanics, Cavtat, Croatia, pp. 367–74.
14.
International Institute of Welding, 1993, “Stress Determination for Fatigue Analysis of Weld Components,” E. Niemi (Ed), Abington Publishing, UK.
15.
Det norske Veritas, 1998, “SESAM-User Manual,” Hovik, Norway.
16.
Garbatov, Y., Pertov, H., and Guedes Soares, C., 2001, “Fatigue Assessment of the Windows Corner Structure of a Passenger Ship,” Proceedings of the 3rd International Conference on Marine Industry (MARIND’01), II, pp. 95–107.
17.
Paris
, P.
, and Erdogan
, F.
, 1963
, “A Critical Analysis of Crack Propagation Laws
,” J. Basic Eng.
, 85
, pp. 528
–34
.Copyright © 2004
by ASME
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