Fatigue of high-speed aluminium ships: A master curve formulation

被引:0
|
作者
den Besten, J. H. [1 ]
Huijsmans, R. H. M. [1 ]
机构
[1] Delft Univ Technol, Ship Hydromech & Struct Dept, Delft, Netherlands
关键词
STRESS DISTRIBUTIONS; NOTCHES; CRACKS;
D O I
暂无
中图分类号
U6 [水路运输]; P75 [海洋工程];
学科分类号
0814 ; 081505 ; 0824 ; 082401 ;
摘要
Aim is to develop a design method concerning high-cycle fatigue of arc-welded joints in high-speed aluminium ships. Accordingly, a Linear Elastic Fracture Mechanics (LEFM) based non-similitude two-stage (micro-and macro) crack propagation model is proposed and elaborated into a fatigue master curve formulation. First, an analytical, parametric expression of the micro-crack propagation dominating Stress Concentration Factor (SCF) related weld notch stress distribution along the (virtual) crack has been developed for welded basic joints. This expression is used to correct the macro-crack propagation governing LEFM parameter, the Stress Intensity Factor (SIF). Subsequently, a crack propagation model is developed and successfully verified using aluminium Centre Cracked Tension (CCT) specimen experimental data. Finally, a fatigue master curve formulation is obtained and satisfactorily validated using fatigue test data of aluminium welded basic joints.
引用
收藏
页码:267 / 275
页数:9
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