Analysis of Fatigue Crack Growth in Ship Structural Details

Open access

Abstract

Fatigue failure avoidance is a goal that can be achieved only if the fatigue design is an integral part of the original design program. The purpose of fatigue design is to ensure that the structure has adequate fatigue life. Calculated fatigue life can form the basis for meaningful and efficient inspection programs during fabrication and throughout the life of the ship. The main objective of this paper is to develop an add-on program for the analysis of fatigue crack growth in ship structural details. The developed program will be an add-on script in a pre-existing package. A crack propagation in a tanker side connection is analyzed by using the developed program based on linear elastic fracture mechanics (LEFM) and finite element method (FEM). The basic idea of the developed application is that a finite element model of this side connection will be first analyzed by using ABAQUS and from the results of this analysis the location of the highest stresses will be revealed. At this location, an initial crack will be introduced to the finite element model and from the results of the new crack model the direction of the crack propagation and the values of the stress intensity factors, will be known. By using the calculated direction of propagation a new segment will be added to the crack and then the model is analyzed again. The last step will be repeated until the calculated stress intensity factors reach the critical value.

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  • 1. B. Ayyub et al. : Risk-informed inspection of marine vessels. Ship Structures Committee SSC-421 2002.

  • 2. R. Bea: Maintenance of marine structures: A state of the art summary. DTIC Document1993.

  • 3. C. C. Capanoglu: Fatigue Technology Assessment and Strategies for Fatigue Avoidance in Marine Structures. Ship Structure Committee (SSC) 1993.

  • 4. T. Xu : Fatigue of ship structural details – Technical Development and Problems. Journal of Ship Research vol. 41 pp. 318-331 1997.

  • 5. S. Moaveni: Finite element analysis: theory and application with ANSYS. Upper Saddle River N.J.: Prentice Hall 1999.

  • 6. Y.-L. Lee: Fatigue testing and analysis: theory and practice. Amsterdam; Boston: Elsevier Butterworth-Heinemann 2005.

  • 7. J. Schijve: Fatigue of structures and materials. New York: Springer 2008.

  • 8. International Association of Classification Societies ltd. (IACS) : Standard Wave Data. Recommendation 34 2001.

  • 9. Det Norske Veritas : Fatigue Strength Analysis of Offshore Steel Structures. (DNV) RP-C203 Recommended Practice-C203 2001.

  • 10. B. Farahmand et al. Fatigue and fracture mechanics of high risk parts: application of LEFM & FMDM theory. New York: Chapman & Hall 1997.

  • 11. B. Farahmand : Fracture mechanics of metals composites welds and bolted joints: application of LEFM EPFM and FMDM theory. Boston: Kluwer Academic Publishers 2001.

  • 12. S. Beden et al.: Review of Fatigue Crack Propagation Models for Metallic Components. European Journal of Scientific Research vol. 28 pp. 364-397 2009.

  • 13. H. A. Rothbart and T. H. Brown: Mechanical design handbook: measurement analysis and control of dynamic systems. 2nd Ed. New York: McGraw-Hill 2006.

  • 14. Det Norske Veritas : Fatigue Assessment of Ship Structures. (DNV) CN 30.7 2010.

  • 15. Dassault Systèmes Simulia Corp.: ABAQUS Analysis User’s Manual. Dassault Systèmes Simulia Corp. 2008.

  • 16. K. Ma and R. G. Bea: A Repair Management System for Fatigue Cracks in Ships. SNAME Transactions vol. 103 pp. 343-369 1995.

  • 17. M. R. Andersen: Fatigue crack initiation and growth in ship structures. Ph. D Thesis Department of Naval Architecture and Offshore Engineering Technical University of Denmark Lyngby 1998.

  • 18. Dassault Systèmes Simulia Corp.: ABAQUS Theory Manual. Dassault Systèmes Simulia Corp. 2008.

  • 19. Registro Italiano Navale : Rules for the checking of the fatigue strength of ship hull structures. 1995.

  • 20. A. Miranda et al.: Path and life predictions under mixed mode I-Mode II complex loading. Paper presented at the International Symposium on Solid Mechanics University of São Paulo São Paulo Brazil 2007.

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