Plastic fracture simulation by using discretized virtual internal bond

被引：12

作者：

Ding, Jiafeng ^{[1
]}

Zhang, Zhennan ^{[1
,2
]}

Yang, Fengpeng ^{[1
]}

Zhao, Yixin ^{[3
]}

Ge, Xiurun ^{[1
]}

机构：

[1] Shanghai Jiao Tong Univ, Sch Naval Architecture Ocean & Civil Engn, Shanghai 200240, Peoples R China

[2] China Univ Min & Technol, State Key Lab GeoMech & Deep Underground Engn, Xuzhou 221008, Peoples R China

[3] China Univ Min & Technol, Sch Resource & Safety Engn, Beijing 100083, Peoples R China

来源：

ENGINEERING FRACTURE MECHANICS | 2017年 / 178卷

基金：

中国国家自然科学基金;

关键词：

Plastic fracture; Lattice model; Fracture energy; Plastic deformation; Discretized virtual internal bond; LATTICE SPRING MODEL; CRACK-GROWTH; DYNAMIC FRACTURE; DAMAGE;

D O I：

10.1016/j.engfracmech.2017.04.032

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

The plastic deformation is always localized prior to fracture for ductile materials. To unify the plasticity and fracture together on the micro bond level, a plasticity-fracture-embedded bond potential is proposed for the lattice model. The discretized virtual internal bond (DVIB) is a newly-developed lattice model, which consists of lattice bond cells. With this proposed bond potential, the DVIB can capture the irreversibility feature of the plastic deformation and simulate the plastic fracture propagation of materials with fracture energy conservation. The simulation results are almost independent of mesh size. The unified bond potential stabilizes the lattice model and makes the simulation results more reliable in plastic fracture simulation. It provides a more straightforward, simple and efficient method for plastic fracture simulation. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：169 / 183

页数：15

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