Stable node-based smoothed extended finite element method for fracture analysis of structures

被引：15
|
作者：
Zhao, J. W. [1 ,2 ]
Feng, S. Z. [1 ,2 ]
Tao, Y. R. [1 ,2 ]
Li, Z. X. [3 ,4 ]
机构：
[1] Hebei Univ Technol, State Key Lab Reliabil & Intelligence Elect Equip, Tianjin 300130, Peoples R China
[2] Hebei Univ Technol, Sch Mech Engn, Tianjin 300130, Peoples R China
[3] Univ Wollongong, Sch Mech Mat Mechatron & Biomed Engn, Wollongong, NSW 2522, Australia
[4] Ocean Univ China, Sch Engn, Qingdao 266100, Peoples R China
来源：
COMPUTERS & STRUCTURES | 2020年 / 240卷
基金：
中国国家自然科学基金;
关键词：
XFEM; Fracture; Numerical methods; NS-FEM; CRACK-GROWTH; MESHFREE METHOD; XFEM; SIMULATION; GRADIENT; PROPAGATION; EFFICIENT; INTEGRATION; SCATTERING; ACCURATE;
D O I：
10.1016/j.compstruc.2020.106357
中图分类号：
TP39 [计算机的应用];
学科分类号：
081203 ; 0835 ;
摘要：
Based on low-order elements, a stable node-based smoothed extended finite element method (SNS-XFEM) is proposed for fracture analysis of structures in this study. For the proposed method, the problem domain is discretized using low-order elements, which can be easily generated for structures with complex shapes. The node-based smoothing domains are then generated to perform the strain smoothing technique, which can effectively avoid singular integration. The discontinuity caused by crack is modeled using enrichment functions and a stabilization term based on strain gradient is also taken into account to further improve the accuracy. Finally, some numerical cases are studied to fully investigate the performance of present method. The obtained results show that the proposed SNS-XFEM can perform much better than standard XFEM and NS-XFEM. (C) 2020 Elsevier Ltd. All rights reserved.
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页数：14
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