Prediction of fatigue crack propagation in bulb stiffeners by experimental and numerical methods

被引：5
|
作者：
Yue, Jingxia [1 ]
Dang, Zhifan [1 ]
Guedes Soares, C. [2 ]
机构：
[1] Wuhan Univ Technol, Sch Transportat, Wuhan 430063, Peoples R China
[2] Univ Lisbon, Ctr Marine Technol & Ocean Engn CENTEC, Inst Super Tecn, Lisbon, Portugal
来源：
INTERNATIONAL JOURNAL OF FATIGUE | 2017年 / 99卷
基金：
中国国家自然科学基金;
关键词：
Bulb stiffener; Crack opening displacement; Fatigue crack growth; Fatigue test; LIFE PREDICTION; SURFACE CRACKS; GROWTH;
D O I：
10.1016/j.ijfatigue.2017.02.022
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Fatigue crack propagation in bulb stiffeners, which are widely used in ship and bridge structures, is one of the basic problems for structures' fatigue life prediction. This paper proposes a method to calculate the fatigue crack propagation in bulbs, which provides a method for defining the failure criterion for bulb stiffeners. The shape of a three dimensional surface crack in a full-scale bulb stiffener fatigue test was measured and estimated by the Nominalization Crack Opening Displacement method. Then the obtained crack shape was used to predict the fatigue crack propagation in the bulb stiffener based on the two dimensional Paris' law and the Linear Finite Element Analysis method. Moreover, the predicted fatigue crack propagation has been verified by the full-scale fatigue test on a typical ship structure detail. (C) 2017 Elsevier Ltd. All rights reserved.
引用
收藏
页码：101 / 110
页数：10
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