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Estimation of the Shape Evolution and the Growth History of an Embedded Crack by Fatigue Loading

[+] Author Affiliations
Koji Gotoh, Keisuke Harada

Kyushu University, Fukuoka, Japan

Yosuke Anai

National Maritime Research Institute, Mitaka, Tokyo, Japan

Paper No. OMAE2011-49457, pp. 277-284; 8 pages
doi:10.1115/OMAE2011-49457
From:
  • ASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering
  • Volume 3: Materials Technology; Jan Vugts Symposium on Design Methodology of Offshore Structures; Jo Pinkster Symposium on Second Order Wave Drift Forces on Floating Structures; Johan Wichers Symposium on Mooring of Floating Structures in Waves
  • Rotterdam, The Netherlands, June 19–24, 2011
  • ISBN: 978-0-7918-4435-9
  • Copyright © 2011 by ASME

abstract

Fatigue life estimation for planar cracks, e.g. part-through surface cracks or embedded cracks is very important because most of fatigue cracks found in welded built-up structures show planar crack morphologies. Fatigue crack growth behaviour of an embedded crack in welded joints is investigated in this study. The estimation procedure of crack shape evolution for an embedded crack is introduced and validation of the estimation procedure of fatigue crack growth based on the numerical simulation of fatigue crack growth with EDS concept for an embedded crack is performed. The validity of the proposed shape evolution estimation method and the fatigue crack growth simulation based on the fracture mechanics approach with EDS concept are confirmed.

Copyright © 2011 by ASME

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