Multiscale material modeling and its application to a dynamic crack propagation problem

被引：34

作者：

Lee, J. D. ^{[1
]}

Wang, X. Q. ^{[1
]}

Chen, Y. P. ^{[2
]}

机构：

[1] George Washington Univ, Dept Mech & Aerosp Engn, Washington, DC 20052 USA

[2] Univ Florida, Dept Mech & Aerosp Engn, Gainesville, FL 32611 USA

来源：

THEORETICAL AND APPLIED FRACTURE MECHANICS | 2009年 / 51卷 / 01期

基金：

美国国家科学基金会;

关键词：

Multiscale modeling; Multi-grain material system; Crack propagation; Single crystal; Grain boundary; Finite element; Molecular dynamics; LENGTH SCALES; CONTINUUM; SIMULATIONS;

D O I：

10.1016/j.tafmec.2009.01.003

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Here we present a multiscale field theory for modeling and simulation of multi-grain material system which consists of several different kinds of single crystals and a large number of different kinds of discrete atoms. The theoretical construction of the multiscale field theory is briefly introduced. The inter-atomic forces are used to formulate the governing equations for the system. A compact tension specimen made of magnesium oxide is modeled by discrete atoms in front of the crack tip and finite elements in the far field. Results showing crack propagation through the atomic region are presented. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：33 / 40

页数：8

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