中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Effect of heterogeneity of brittle rock on micromechanical extensile behavior during compression loading

文献类型:SCI/SSCI论文

作者Lan H. X. ; Martin C. D. ; Hu B.
发表日期2010
关键词westerly granite grain-size propagation thresholds statistical techniques fracture-toughness surface energies particle model failure microcracks deformation
英文摘要A grain-based Universal Distinct Element Code model was developed to generate a deformable polygonal grain-like structure to simulate the microstructure of brittle rock. It takes into account grain-scale heterogeneity including microgeometric heterogeneity, grain-scale elastic heterogeneity, and microcontact heterogeneity. The microgeometric heterogeneity can be used to match the grain size distribution of the rock. The discrete element approach is able to simulate the microheterogeneity caused by elastic variation and contact stiffness anisotropy. The modeling approach was evaluated using Lac du Bonnet granite and A "Aspo" Diorite. The microheterogeneity played an important role in controlling both the micromechanical behavior and the macroscopic response when subjected to uniaxial compression loading. The crack-initiation stress was found to be controlled primarily by the microscale geometric heterogeneity, while the microcontact heterogeneity controlled the strength characteristics. The effect of heterogeneity on the distribution and evolution of tensile stresses and associated extension cracks was also examined.
出处Journal of Geophysical Research-Solid Earth
115
收录类别SCI
ISSN号0148-0227
源URL[http://ir.igsnrr.ac.cn/handle/311030/23706]  
专题地理科学与资源研究所_历年回溯文献
推荐引用方式
GB/T 7714
Lan H. X.,Martin C. D.,Hu B.. Effect of heterogeneity of brittle rock on micromechanical extensile behavior during compression loading. 2010.

入库方式: OAI收割

来源:地理科学与资源研究所

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