A grain based modeling study of mineralogical factors affecting strength, elastic behavior and micro fracture development during compression tests in granites
A grain based modeling study of mineralogical factors affecting strength, elastic behavior and micro fracture development during compression tests in granites
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DOI：
10.1016/j.engfracmech.2015.09.008
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发表时间：
2015-10-01
影响因子：
5.4
通讯作者：
Zimmermann, Guenter
中科院分区：
文献类型：
--
作者：
Hofmann, Hannes;Babadagli, Tayfun;Zimmermann, Guenter
矿物的大小和分布，和模型离散化的弹性岩石性质，岩石强度，微裂纹的类型和数量的影响进行了数值研究，使用二维离散元颗粒建模（GBM）的方法。该模型进行了校准，以无侧限和侧限压缩试验和巴西拉伸试验进行Aue花岗岩。对同一岩石进行了约束非对称压缩试验，并与物理断裂路径进行了比较。GBM方法能够再现所有主要的实验室观察结果，包括压缩强度和巴西拉伸强度之间的正确比率，这是早期接触模型无法捕获的。(C)2015爱思唯尔有限公司版权所有。
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.