A coupling model of XFEM/peridynamics for 2D dynamic crack propagation and branching problems

被引：35

作者：

Liu, Shuo ^{[1
]}

Fang, Guodong ^{[1
]}

Liang, Jun ^{[2
]}

Lv, Dongkai ^{[3
]}

机构：

[1] Harbin Inst Technol, Sci & Technol Adv Composites Special Environm Key, Harbin 150001, Peoples R China

[2] Beijing Inst Technol, Inst Adv Struct Technol, Beijing 100081, Peoples R China

[3] China Acad Engn Phys, Metrol Testing Ctr, Mianyang 621900, Sichuan, Peoples R China

来源：

THEORETICAL AND APPLIED FRACTURE MECHANICS | 2020年 / 108卷

基金：

中国国家自然科学基金;

关键词：

Peridynamics; Coupling; Dynamic crack propagation; Extended finite element method; STATE-BASED PERIDYNAMICS; FINITE-ELEMENT-METHOD; BRITTLE SOLIDS; DISCRETIZED PERIDYNAMICS; NUMERICAL-SIMULATION; FEM MESHES; FRACTURE; FORMULATION; COALESCENCE; INITIATION;

D O I：

10.1016/j.tafmec.2020.102573

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Peridynamics (PD) and extended finite element method (XFEM) are coupled in the explicit integration scheme to study the 2D dynamic fracture problems. The advantages of PD for the crack propagation and XFEM for the strong displacement discontinuity description of the crack are combined together. The proposed method can improve the computation efficiency in comparison of the pure PD, and can avoid using macroscopic criteria to judge the crack propagation orientation of XFEM. The coupling scheme for the stiffness and mass matrices of PD and XFEM is given in the coupling region. The horizon length delta is examined to study their influences on the convergence of the proposed method. The accuracy of the dynamic fracture simulation using the proposed method is also validated in comparison of experimental and other numerical methods.

引用

页数：9

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