Three-Dimensional Network Model for Coupling of Fracture and Mass Transport in Quasi-Brittle Geomaterials

被引：54

作者：

Grassl, Peter ^{[1
]}

Bolander, John ^{[2
]}

机构：

[1] Univ Glasgow, Sch Engn, Glasgow G12 8LT, Lanark, Scotland

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

来源：

MATERIALS | 2016年 / 9卷 / 09期

基金：

英国工程与自然科学研究理事会;

关键词：

fracture; mass transport; geomaterial; network model; HYDRAULIC FRACTURE; IRREGULAR LATTICES; CRACKED CONCRETE; DAMAGE; PERMEABILITY; SIMULATION;

D O I：

10.3390/ma9090782

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Dual three-dimensional networks of structural and transport elements were combined to model the effect of fracture on mass transport in quasi-brittle geomaterials. Element connectivity of the structural network, representing elasticity and fracture, was defined by the Delaunay tessellation of a random set of points. The connectivity of transport elements within the transport network was defined by the Voronoi tessellation of the same set of points. A new discretisation strategy for domain boundaries was developed to apply boundary conditions for the coupled analyses. The properties of transport elements were chosen to evolve with the crack opening values of neighbouring structural elements. Through benchmark comparisons involving non-stationary transport and fracture, the proposed dual network approach was shown to be objective with respect to element size and orientation.

引用

页数：18

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