An Extended Bond-Based Peridynamic Approach for Analysis on Fracture in Brittle Materials

被引：23
作者：
Li, Shuang [1 ]
Jin, Yanli [1 ]
Huang, Xiaohua [1 ]
Zhai, Lianjun [1 ]
机构：
[1] Guangxi Univ, Coll Civil Engn & Architecture, Minist Educ,Key Lab Disaster Prevent & Struct Saf, Guangxi Key Lab Disaster Prevent & Engn Safety, Nanning 530004, Peoples R China
来源：
MATHEMATICAL PROBLEMS IN ENGINEERING | 2020年 / 2020卷 / 2020期
基金：
中国国家自然科学基金;
关键词：
CRACK-PROPAGATION; ADAPTIVE REFINEMENT; DEFORMATION; FORMULATION;
D O I：
10.1155/2020/9568015
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
To enhance the calculation accuracy of bond-based peridynamics (BPD), a novel attenuation function is introduced to describe the effect of internal length on nonlocal long-range forces. Furthermore, the expression of the micromodulus function is deduced, and the corresponding fracture criteria are established. The validity and accuracy of the extended bond-based peridynamic approach are illustrated by three numerical examples: 2D isotropic plate under uniaxial loading; plate with a circular cutout under quasi-static loading; and a diagonally loaded square plate with a center pre-existing crack. Finally, the influence of the width and the angle of the pre-existing crack on the fracture initiation time and the crack propagation paths are studied by applying the proposed approach.
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页数：12
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