中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Discrete numerical modeling of granular materials considering crushability

文献类型:期刊论文

作者QIAN Jian-gu; GU Jian-bo; GU Xiao-qiang; HUANG Mao-song
刊名Journal of Mountain Science
出版日期2017-04
卷号14期号:4页码:758-770
关键词Dem Simulation Granular Materials Crushing Monotonic And Cyclic Triaxial Test
ISSN号1672-6316
DOI10.1007/s11629-016-4051-y
通讯作者GU Xiao-qiang
文献子类期刊论文
英文摘要The aim of this study is to numerically investigate the influence of particle breakage on the mechanical behavior of granular materials using a discrete element method (DEM). To enable particle crushing, non-crushable elementary particles are boned together to represents the granular aggregates which can be crushed when the external force exceeds its strength. The flaw of the aggregate was also modeled by randomly distributed void. Single particle crushing tests were carried out to determine the distribution of particle strength. The results of single particle crushing tests illustrate that the simulated single particle fracture strength and pattern agree well with the Weibull's distribution equation. Conventional oedometer tests, drained monotonic and cyclic triaxial tests were also carried out to investigate the crushing of the aggregates and the associated mechanical behaviors. The effect of confining pressure on the crushing of aggregates and the mechanical behavior was also analyzed. It was found that the peak stress and dilation decrease significantly when particle crushing was considered. The deformation behavior of the specimen is essentially controlled by two factors: particle rearrangement - induced dilation and particlecrushing - induced contraction. The increase of permanent strain and the reduction of dilation were observed during cyclic loading and they tend to reach a stable state after a certain number of cycles. The crushing of aggregate is most significant in the first two cycles. The results also indicated that for the same axial strain the volumetric strain and the bound breakage in the cyclic loading tests are significantly larger than that in the monotonic loading tests, especially at high cyclic stress ratio.
语种英语
源URL[http://ir.imde.ac.cn/handle/131551/18556]  
专题Journal of Mountain Science _Journal of Mountain Science-2017_Vol14 No.4
推荐引用方式
GB/T 7714
QIAN Jian-gu,GU Jian-bo,GU Xiao-qiang,et al. Discrete numerical modeling of granular materials considering crushability[J]. Journal of Mountain Science,2017,14(4):758-770.
APA QIAN Jian-gu,GU Jian-bo,GU Xiao-qiang,&HUANG Mao-song.(2017).Discrete numerical modeling of granular materials considering crushability.Journal of Mountain Science,14(4),758-770.
MLA QIAN Jian-gu,et al."Discrete numerical modeling of granular materials considering crushability".Journal of Mountain Science 14.4(2017):758-770.

入库方式: OAI收割

来源:成都山地灾害与环境研究所

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