A review of fatigue crack propagation modelling techniques using FEM and XFEM

1st Conference of Computational Methods in Offshore Technology

计算机科学

Rege, K.^1 ; Lemu, H.G.^1

Department of Mechanical and Structural Engineering and Materials Science, University of Stavanger, Norway^1

关键词: Analytical determination;    Expected lifetime;    Extended finite element method;    Fatigue failures;    Modelling techniques;    Number of cycles;    Offshore installations;    Structural systems;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/276/1/012027/pdf
DOI  :  10.1088/1757-899X/276/1/012027

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

Fatigue is one of the main causes of failures in mechanical and structural systems. Offshore installations, in particular, are susceptible to fatigue failure due to their exposure to the combination of wind loads, wave loads and currents. In order to assess the safety of the components of these installations, the expected lifetime of the component needs to be estimated. The fatigue life is the sum of the number of loading cycles required for a fatigue crack to initiate, and the number of cycles required for the crack to propagate before sudden fracture occurs. Since analytical determination of the fatigue crack propagation life in real geometries is rarely viable, crack propagation problems are normally solved using some computational method. In this review the use of the finite element method (FEM) and the extended finite element method (XFEM) to model fatigue crack propagation is discussed. The basic techniques are presented, together with some of the recent developments.