Prediction of fatigue crack propagation in bulb-flat by experimental and numerical method
Artikel i vetenskaplig tidskrift, 2018

The fatigue crack propagation in the bulb-flat, which is widely used in ship and bridge engineer ing, is one of the basic parameters for structures'fatigue life prediction. In this paper, the shape of a three dimensional surface crack in full-scale bulb-flat was measured and estimated by Nominalization Crack Opening Displacement (NCOD) method. Then the obtained crack shape was used to predict the fatigue crack propagation in the bulb-flat based on the two dimensional Paris formula and the Linear Finite Element Analysis (LFEA) method. Finally, the predicted fatigue crack propagation was verified by the full-scale fa tigue test on a typical ship structure in detail. This method proposed in this paper may provide reference to the definition of failure criterion of bulb-flat.

Fatigue crack growth

Crack opening displacement

Fatigue test



Z. Dang

China Ship Development and Design Center

J. Yue

Wuhan University of Technology

Wengang Mao

Chalmers, Mekanik och maritima vetenskaper, Marin teknik

Chuan Bo Li Xue/Journal of Ship Mechanics

1007-7294 (ISSN)

Vol. 22 7 873-881


Teknisk mekanik

Bearbetnings-, yt- och fogningsteknik

Annan materialteknik



Mer information

Senast uppdaterat