Peridynamics and FEM coupling model for fracture of marine brittle materials

被引：0

作者：

Li, Shuang ^{[1
,2
]}

Lü, Hai-Ning ^{[1
,2
]}

Huang, Xiao-Hua ^{[3
]}

Mao, Jing-Hang ^{[1
,2
]}

Qin, Rui ^{[1
,2
]}

机构：

[1] State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai

[2] Yazhou Bay Institute of Deepsea SCI-TECH, Shanghai Jiao Tong University, Sanya

[3] Key Laboratory of Disaster Prevention and Structural Safety, Ministry of Education, Guangxi University, Nanning

来源：

Chuan Bo Li Xue/Journal of Ship Mechanics | 2024年 / 28卷 / 10期

关键词：

brittle material; crack propagation; finite element method; fracture; peridynamics;

D O I：

10.3969/j.issn.1007-7294.2024.10.011

中图分类号：

学科分类号：

摘要：

It is inevitable to use various high-strength materials with brittle characteristics in the construction of ship structures. In order to study the fracture and crack propagation behavior of marine brittle materials, a coupling model of FEM and peridynamics was proposed based on the peridynamic theory. Firstly, the long-range force attenuation effect correction was considered on the basis of peridynamics. Then, the sharing node method was used to couple the FEM with the improved peridynamics, and a new fracture criterion was derived. Finally, the accuracy of the coupling model was verified by three examples. The results show that the coupling model improves the computational accuracy of the traditional peridynamic model greatly, and eliminates the“surface effect”, and it overcomes the FEM singularity when dealing with discontinuities. The calculation results of the coupling model are in good agreement with the experimental results, and the present model is feasible to study the fracture of marine brittle materials. © 2024 China Ship Scientific Research Center. All rights reserved.

引用

页码：1588 / 1589

页数：1

共 18 条

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