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 |
| DOI | 10.1007/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
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。