A novel multi-grid based reanalysis approach for efficient prediction of fatigue crack propagation

被引:63
作者
Feng, S. Z. [1 ]
Han, X. [1 ]
机构
[1] Hebei Univ Technol, Sch Mech Engn, Tianjin 300130, Peoples R China
基金
国家重点研发计划;
关键词
Multi-grid; Reanalysis; Crack propagation; XFEM; FINITE-ELEMENT-METHOD; COMBINED APPROXIMATIONS; STRUCTURAL-ANALYSIS; GROWTH; SIMULATION; FRACTURE; XFEM; ALGORITHM; DESIGN; LIFE;
D O I
10.1016/j.cma.2019.05.001
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
In order to model the fatigue crack propagation of engineering structures with high efficiency, a novel multi-grid (MG) reanalysis method is formulated in this study under the framework of the extended finite element method (XFEM). In the numerical approach, the MG is firstly used to establish connections between the mesh with no crack and the meshes with crack. The transfer operators are constructed only in the initial MG analysis and will be reused in the crack propagation analysis. Then, the equilibrium equations of crack propagation can be efficiently solved through the MG iterations. Several numerical examples are investigated to verify the validity of this method and it is shown that the presented algorithm is very accurate and can efficiently reduce the computational cost. (C) 2019 Published by Elsevier B.V.
引用
收藏
页码:107 / 122
页数:16
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