A grain based modeling study of mineralogical factors affecting strength, elastic behavior and micro fracture development during compression tests in granites

被引：140

作者：

Hofmann, Hannes ^{[1
]}

Babadagli, Tayfun ^{[1
]}

Yoon, Jeoung Seok ^{[2
]}

Zang, Arno ^{[2
]}

Zimmermann, Guenter ^{[2
]}

机构：

[1] Univ Alberta, Edmonton, AB, Canada

[2] GFZ German Res Ctr Geosci, Potsdam, Germany

来源：

ENGINEERING FRACTURE MECHANICS | 2015年 / 147卷

关键词：

Discrete element modeling (DEM); Grain based modeling (GBM); Compression tests; Granites; PARTICLE MODEL; DEM SIMULATION; BOUNDARY;

D O I：

10.1016/j.engfracmech.2015.09.008

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

The influence of mineral size and distribution, and model discretization on elastic rock properties, rock strength, and types and numbers of micro cracks was studied numerically using a two-dimensional discrete element grain based modeling (GBM) approach. The model was calibrated to unconfined and confined compression tests and Brazilian tensile tests performed on Aue granite. Confined asymmetric compression tests were simulated for the same rock and compared to physical fracture paths. The GBM approach is able to reproduce all major laboratory observations including the correct ratio between compression strength and Brazilian tensile strength that cannot be captured with earlier contact models. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：261 / 275

页数：15

共 58 条

[1] THE INFLUENCE OF MICROCRACK DENSITY ON THE ELASTIC AND FRACTURE MECHANICAL-PROPERTIES OF STRIPA GRANITE [J].