DYNAMIC CRACK PROPAGATION USING A COMBINED MOLECULAR DYNAMICS/EXTENDED FINITE ELEMENT APPROACH

被引：7

作者：

Aubertin, Pascal ^{[2
]}

Rethore, Julien ^{[2
]}

de Borst, Rene ^{[1
]}

机构：

[1] Eindhoven Univ Technol, Dept Mech Engn, NL-5600 MB Eindhoven, Netherlands

[2] Univ Lyon, CNRS INSA Lyon, LaMCoS UMR 5259, Lyon, France

来源：

INTERNATIONAL JOURNAL FOR MULTISCALE COMPUTATIONAL ENGINEERING | 2010年 / 8卷 / 02期

关键词：

multiscale methods; molecular dynamics; extended finite element method; fracture; crack propagation; FLUID-FLOW; GROWTH; STRESS; DISLOCATIONS; SIMULATION; FRACTURE; SOLIDS; MODELS; ATOMS;

D O I：

10.1615/IntJMultCompEng.v8.i2.70

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A method is presented for simulating dynamic crack propagation using a coupled molecular dynamics/extended finite element method. Molecular dynamics is used at the crack tip while the extended finite element method naturally models the crack in the wake of the tip as a traction-free discontinuity. After recalling the basic molecular dynamics equations, the discretization of the continuum and the traction-free discontinuity via the extended finite element method, and the zonal coupling method between both domains, two-dimensional computations of dynamic fracture are presented, including a discussion on how to move and/or expand the zone in which molecular dynamics is used upon crack propagation.

引用

页码：221 / 235

页数：15

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