Irregular lattice model for quasistatic crack propagation

被引：149

作者：

Bolander, JE ^{[1
]}

Sukumar, N ^{[1
]}

机构：

[1] Univ Calif Davis, Dept Civil & Environm Engn, Davis, CA 95616 USA

来源：

PHYSICAL REVIEW B | 2005年 / 71卷 / 09期

关键词：

D O I：

10.1103/PhysRevB.71.094106

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

An irregular lattice model is proposed for simulating quasistatic fracture in softening materials. Lattice elements are defined on the edges of a Delaundy tessellation of the medium. The dual (Voronoi) tessellation is used to scale the elemental stiffness terms in a manner that renders the lattice elastically homogeneous. This property enables the accurate modeling of heterogeneity, as demonstrated through the elastic stress analyses of fiber composites. A cohesive description of fracture is used to model crack initiation and propagation. Numerical simulations, which demonstrate energy-conserving and grid-insensitive descriptions of cracking, are presented. The model provides a framework for the failure analysis of quasibrittle materials and fiber-reinforced brittle-matrix composites.

引用

页数：12

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