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.

Crack opening displacement

Fatigue test

Fatigue crack growth

Bulb-flat

Författare

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

Ämneskategorier

Teknisk mekanik

Bearbetnings-, yt- och fogningsteknik

Annan materialteknik

DOI

10.3969/j.issn.1007-7294.2018.07.011

Mer information

Senast uppdaterat

2019-06-24