CSCD来源期刊

北大中文核心期刊

中国科技核心期刊

地学领域高质量科技期刊分级T2区（2023）

世界期刊影响力指数报告Q1区（2023）

Volume 40 Issue 3
May  2021
Turn off MathJax
Article Contents
Article Navigation >  Bulletin of Geological Science and Technology  > 2021  >  40(3): 184-193
Jing Xu, Xie Wanli, Shan Shuai. Discrete element simulation study on micromechanical characteristics of undisturbed and remolded loess in biaxial test[J]. Bulletin of Geological Science and Technology, 2021, 40(3): 184-193. doi: 10.19509/j.cnki.dzkq.2021.0311
Citation: Jing Xu, Xie Wanli, Shan Shuai. Discrete element simulation study on micromechanical characteristics of undisturbed and remolded loess in biaxial test[J]. Bulletin of Geological Science and Technology, 2021, 40(3): 184-193. doi: 10.19509/j.cnki.dzkq.2021.0311
shu

Discrete element simulation study on micromechanical characteristics of undisturbed and remolded loess in biaxial test

doi: 10.19509/j.cnki.dzkq.2021.0311
  • Received Date: 14 Aug 2020
    Abstract
  • Loess is a special granular material, and its mechanical properties are determined by the microscopic structure of granules. The undisturbed and remolded loess have different mechanical properties due to the difference in structure. In order to solve the basic problem of how the structural properties of loess affect its mechanical characteristics, based on scanning electron microscopy (SEM) to study the macroscopic and microscopic mechanical properties of undisturbed loess and saturated remolded loess under constant strain rate biaxial test, while considering the shape of particles and the possibility of particle breakage. The simulation results show that when the stress is low, the undisturbed loess and the remolded loess force chains are mostly distributed near the large framework particles. With the increase of stress, the undisturbed force chains form a network pattern but still have the main conduction region, while the remolded loess has no obvious major conduction region and presents a uniform mesh. Under the same confining pressure and strain, the number of cracks in the undisturbed loess is lower and they are concentrated in the shear zone. The number of cracks in the remolded loess is more but more uniform.Tension cracks are mostly formed around the clusters of undisturbed loess and remolded loess. Shear cracks are mostly formed inside the clusters of framework particles, and the most obvious is when the clusters of particles are in contact with each other. Using this modeling method can effectively reflect the different internal stress states of undisturbed and remolded loess under the same stress condition due to the difference in internal structure composition. Based on the above research conclusions, a microscopic explanation of the influence of loess structure on the macroscopic strength is given. The research results can provide a certain basis for the prevention and control of geological disasters in the loess area.

     

    • FullText(HTML)
  • loading
    • References(30)
  • [1]
    任晓虎, 许强, 赵宽耀, 等. 反复入渗对重塑黄土渗透特性的影响[J]. 地质科技通报, 2020, 39(2): 130-138. http://dzkjqb.cug.edu.cn/CN/abstract/abstract9982.shtml

    Ren X H, Xu Q, Zhao K Y, et al. Effect of repeated infiltration on permeability characteristics of remolded loess[J]. Bulletin of Geological Science and Technology, 2020, 39(2): 130-138(in Chinese with English abstract). http://dzkjqb.cug.edu.cn/CN/abstract/abstract9982.shtml
    [2]
    刘博诗, 张延杰, 王旭, 等. 人工制备黄土湿陷性影响因素及微观机理研究[J]. 地下空间与工程学报, 2017, 13(2): 330-336, 343. https://www.cnki.com.cn/Article/CJFDTOTAL-BASE201702007.htm

    Liu B S, Zhang Y J, Wang X, et al. Research on the collapsibility influencing factors and micro-mechanism of artificial loess[J]. Chinese Journal of Underground Space and Engineering, 2017, 13(2): 330-336, 343(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-BASE201702007.htm
    [3]
    Wan L X, Ping L, Sai K, et al. Prediction of the wetting-induced collapse behaviour using the soil-water characteristic curve[J]. Journal of Asian Earth Sciences, 2018, 151: 259-268. doi: 10.1016/j.jseaes.2017.11.009
    [4]
    董吉, 陈筠, 邬忠虎, 等. 木质素纤维红黏土强度及变形特性试验研究[J]. 地质力学学报, 2019, 25(3): 421-427. https://www.cnki.com.cn/Article/CJFDTOTAL-DZLX201903009.htm

    Dong J, Chen Y, Wu Z H, et al. Experimental study on the shear strength and deformation characteristics of lignin-fiber red clay[J]. Chinese Journal of Geomechanics, 2019, 25(3): 421-427(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-DZLX201903009.htm
    [5]
    张炜, 周剑, 于世伟, 等. 双轴压缩下颗粒物质接触力与力链特性研究[J]. 应用力学学报, 2018, 35(3): 530-537, 687. https://www.cnki.com.cn/Article/CJFDTOTAL-YYLX201803014.htm

    Zhang W, Zhou J, Yu S W, et al. Research on contact force and force chain characteristics of particulate matter under biaxial compression[J]. Chinese Journal of Applied Mechanics, 2018, 35(3): 530-537, 687(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-YYLX201803014.htm
    [6]
    Bock H, Blümling P, Konietzky H. Study of the micro-mechanical behaviour of the Opalinus Clay: An example of co-operation across the ground engineering disciplines[J]. Bulletin of Engineering Geology and the Environment, 2006, 65(2): 195-207. doi: 10.1007/s10064-005-0019-9
    [7]
    李识博, 王常明, 王念秦, 等. 黄土三轴试验的颗粒流数值模拟[J]. 中国公路学报, 2013, 26(6): 22-29. doi: 10.3969/j.issn.1001-7372.2013.06.004

    Li S B, Wang C M, Wang N Q, et al. Numerical simulation of loess triaxial shear test by PFC3D[J]. China Journal of Highway and Transport, 2013, 26(6): 22-29(in Chinese with English abstract). doi: 10.3969/j.issn.1001-7372.2013.06.004
    [8]
    张崇帅. 考虑球体颗粒胶结的三维颗粒流模拟研究[D]. 西安: 西安理工大学, 2018.

    Zhang C S. PFC3D simulation study considering spherical particle cementation[D]. Xi'an: Xi'an University of Technology, 2018(in Chinese with English abstract).
    [9]
    宁孝梁. 黏性土的细观三轴模拟与微观结构研究[D]. 杭州: 浙江大学, 2017.

    Ning X L. The meso-simulation of triaxial tests and microstructure study of the cohesive soil[D]. Hangzhou: Zhejiang University, 2017(in Chinese with English abstract).
    [10]
    崔博, 邓博麒, 刘明辉, 等. 基于不规则颗粒离散元的砾石土三轴数值模拟[J]. 水力发电学报, 2020, 39(4): 73-87. https://www.cnki.com.cn/Article/CJFDTOTAL-SFXB202004008.htm

    Cui B, Deng B Q, Liu M H, et al. Numerical simulation of triaxial tests on gravelly soil based on DEM of irregular-shaped particles[J]. Journal of Hydroelectric Engineering, 2020, 39(4): 73-87(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-SFXB202004008.htm
    [11]
    焦玉勇, 王浩, 马江锋. 土石混合体力学特性的颗粒离散元双轴试验模拟研究[J]. 岩石力学与工程学报, 2015, 34(增刊1): 3564-3573. https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX2015S1118.htm

    Jiao Y Y, Wang H, Ma J F. Research on biaxial test of mechanical characteristics on soil-rock aggregate(SRA) based on particle flow code simulation[J]. Chinese Journal of Rock Mechanics and Engineering, 2015, 34(S1): 3564-3573(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX2015S1118.htm
    [12]
    周伦伦. 颗粒破碎与形状对颗粒材料力学性质影响的离散元研究[D]. 武汉: 武汉大学, 2017.

    Zhou L L. DEM investigation of influence of particle breakage and shape on the mechanical behaviors of granular materials[D]. Wuhan: Wuhan University, 2017(in Chinese with English abstract).
    [13]
    Wensrich C M, Katterfeld A, Sugo D. Characterisation of the effects of particle shape using a normalised contact eccentricity[J]. Granular Matter, 2014, 16(3): 327-337. doi: 10.1007/s10035-013-0465-1
    [14]
    闫欣宜, 胡新丽, 付茹. 橡胶纤维-砂混合料力学特性的离散元三轴试验研究[J]. 地质科技通报, 2020, 39(2): 168-174. http://dzkjqb.cug.edu.cn/CN/abstract/abstract9986.shtml

    Yan X Y, Hu X L, Fu R. Triaxial shear test of mechanical characteristics on rubber fiber-sand mixtures based on particle flow code simulation[J]. Bulletin of Geological Science and Technology, 2020, 39(2): 168-174(in Chinese with English abstract). http://dzkjqb.cug.edu.cn/CN/abstract/abstract9986.shtml
    [15]
    Estrada N, E Azéma, Radjai F, et al. Identification of rolling resistance as a shape parameter in sheared granular media[J]. Physical Review E, 2011, 84(1): 11306-11306. doi: 10.1103/PhysRevE.84.011306
    [16]
    林成远, 唐辉明, 汪丁建, 等. 块石定向性特征对土-石混合体强度影响的数值模拟[J]. 地质科技通报, 2020, 39(5): 38-46. http://dzkjqb.cug.edu.cn/CN/abstract/abstract10048.shtml

    Lin C Y, Tang H M, Wang D J, et al. Influence on the strength of soil-rock mixture made by the rock block orientation features based on numerical experiment[J]. Bulletin of Geological Science and Technology, 2020, 39(5): 38-46(in Chinese with English abstract). http://dzkjqb.cug.edu.cn/CN/abstract/abstract10048.shtml
    [17]
    Liu S H, Wang Y S, Shen C M. DEM analysis of granular crushing during simple shearing[J]. Marine Georesources & Geotechnology, 2018, 36(5): 522-531. https://www.researchgate.net/profile/Sihong-Liu-2/publication/319222548_DEM_analysis_of_granular_crushing_during_simple_shearing/links/5e87ea47299bf13079786fb0/DEM-analysis-of-granular-crushing-during-simple-shearing.pdf
    [18]
    李长冬, 唐辉明, 胡新丽, 等. 岩石相似材料变形与强度特性及数值模拟研究[J]. 地质科技情报, 2008, 27(6): 98-101. doi: 10.3969/j.issn.1000-7849.2008.06.019

    Li C D, Tang H M, Hu X L, et al. Deformation and strength characteristics and numerical simulation of rock similar material[J]. Geological Science and Technology Information, 2008, 27(6): 98-101(in Chinese with English abstract). doi: 10.3969/j.issn.1000-7849.2008.06.019
    [19]
    陈璞皎, 郑祥民, 周立旻, 等. 宁镇地区下蜀黄土粒度特征及其古环境意义[J]. 地质科技情报, 2017, 36(5): 7-13. https://www.cnki.com.cn/Article/CJFDTOTAL-DZKQ201705002.htm

    Chen P J, Zheng X M, Zhou L M, et al. Grain size distribution and its significance of the Xiashu loess in Nanjing-Zhenjiang area[J]. Geological Science and Technology Information, 2017, 36(5): 7-13(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-DZKQ201705002.htm
    [20]
    Wang Y, Yang H, Jing X. Structural characteristics of natural loess in northwest China and its effect on shear behavior[J]. Geotechnical and Geological Engineering, 2020, 39(1): 65-78. doi: 10.1007/s10706-020-01608-8
    [21]
    Jiang M, Zhang F, Hu H. DEM Modeling Mechanical Behavior of Unsaturated Structural Loess under Constant Stress Increment Ratio Compression Tests[J]. International Journal of Geomechanics, 2017, 17(4): 04016108. doi: 10.1061/(ASCE)GM.1943-5622.0000762
    [22]
    Shi D D, Zheng L, Xue J F, et al. DEM modeling of particle breakage in silica sands under one-dimensional compression[J]. Acta Mechanica Solida Sinica, 2016, 29(1): 78-94. doi: 10.1016/S0894-9166(16)60008-3
    [23]
    Ueda T, Matsushima T, Yamada Y. DEM simulation on the one-dimensional compression behavior of various shaped crushable granular materials[J]. Granular Matter, 2013, 15(5): 675-684. doi: 10.1007/s10035-013-0415-y
    [24]
    罗勇. 土工问题的颗粒流数值模拟及应用研究[D]. 杭州: 浙江大学, 2007.

    Luo Y. Simulation of soil mechanical behaviors using discrete element method based on particle flow code and it application[D]. Hangzhou: Zhejiang University, 2007(in Chinese with English abstract).
    [25]
    张刚, 周健, 姚志雄. 堤坝管涌的室内试验与颗粒流细观模拟研究[J]. 水文地质工程地质, 2007, 34(6): 83-86. doi: 10.3969/j.issn.1000-3665.2007.06.020

    Zhang G, Zhou J, Yao Z X. Study on mesomechanical simulation of piping with model tests and PFC2D[J]. Hydrogeology and Engineering Geology, 2007, 34(6): 83-86(in Chinese with English abstract). doi: 10.3969/j.issn.1000-3665.2007.06.020
    [26]
    姚志雄, 周健, 张刚. 砂土管涌机理的细观试验研究[J]. 岩土力学, 2009, 30(6): 1604-1610. doi: 10.3969/j.issn.1000-7598.2009.06.012

    Yao Z X, Zhou J, Zhang G. Meso-experimental research on piping mechanism in sandy soils[J]. Rock and Soil Mechanics, 2009, 30(6): 1604-1610(in Chinese with English abstract). doi: 10.3969/j.issn.1000-7598.2009.06.012
    [27]
    Li T, Jiang M M, Colin T. Three-dimensional discrete element analysis of triaxial tests and wetting tests on unsaturated compacted silt[J]. Computers and Geotechnics, 2018, 97: 90-102. doi: 10.1016/j.compgeo.2017.12.011
    [28]
    同霄, 朱兴华, 马鹏辉, 等. 颗粒离散元方法中黄土强度参数研究[J]. 地下空间与工程学报, 2019, 15(2): 435-442. https://www.cnki.com.cn/Article/CJFDTOTAL-BASE201902018.htm

    Tong X, Zhu X H, Ma P H, et al. Study on the strength parameters of loess in granular discrete element method[J]. Chinese Journal of Underground Space and Engineering, 2019, 15(2): 435-442(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-BASE201902018.htm
    [29]
    Owen D R J, Feng Y T. Parallelised finite/discrete element simulation of multi-fracturing solids and discrete systems[J]. Engineering Computations 2001, 18(3/4): 557-576. doi: 10.1108/02644400110387154
    [30]
    蒋明镜, 李涛, 胡海军. 结构性黄土双轴压缩试验的离散元数值仿真分析[J]. 岩土工程学报, 2013, 35(增刊2): 241-246. https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC2013S2041.htm

    Jiang M J, Li T, Hu H J. Numerical simulation of biaxial tests on structured loess by distinct element method[J]. Chinese Journal of Geotechnical Engineering, 2013, 35(S2): 241-246(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC2013S2041.htm
    • Relative Articles
    • Supplements(0)
    • Cited By
  • 加载中

Catalog

    通讯作者: 陈斌, bchen63@163.com
    • 1. 

      沈阳化工大学材料科学与工程学院 沈阳 110142

    1. 本站搜索
    2. 百度学术搜索
    3. 万方数据库搜索
    4. CNKI搜索
    Get Citation
    PDF
    XML

    Article Metrics

    Article Views(652) PDF Downloads(594) Cited by()
    Proportional views
    Related

    Copyright © 2010Editorial Department of Bulletin of Geological Science and Technology

    Supported by: Beijing Renhe Information Technology Co., Ltd.    

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return