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by JENSEN et al [13], and it has also been implemented in common DEM-packages such as PFC2D and PFC3D [14, 15]. According to whether or not overlaps exist between the disks in a cluster, these composite...]. Minneapolis: Itasca Consulting Group Inc., 2004: 818-834. [15] Itasca Consulting Group Inc. PFC3D (Particle flow code in 3 dimensions) (Version 3.1) [R]. Minneapolis: Itasca Consulting Group Inc., 2005......
tests are conducted using PFC3D under special considerations of particle angularity and aperture geometry of the geogrid. In this work, interface characteristics regarding the displacement and contact force developed among particles and the deformation and force distribution along the geogrid are all visualized with PFC3D simulations so that new understanding on how geogrid-soil interaction develops......
COUROYER et al [9]), PFC3D (e.g. WHITTLES et al [4]), FLAC (e.g. REDDISH et al [3]), and theory (e.g. WEICHERT [10]) showed similar conclusions. The research by LI et al [11] indicated......
, 王飞. 管涌的砂槽试验研究及颗粒流模拟[J]. 四川大学学报(工程科学版), 2009, 41(6): 51-57. NI Xiaodong, WANG Yuan, WANG Fei. Study on piping by sand-bank model and simulation by PFC3D[J]. Journal of Sichuan University (Engineering......
] 陈亚东, 于艳, 佘跃心. PFC3D模型中砂土细观参数的确定方法[J]. 岩土工程学报, 2013, 35(增2): 88-93. CHEN Yadong, YU Yan, SHE Yuexin. Method for determining mesoscopic parameters of sand in three-dimensional particle flow code......
[140]结合室内实验和PFC2D数值计算对单轴加载下非平行裂纹的贯通模式进行了研究.ZHANG[145],基于平行粘结模型研究了两条非平行裂隙的贯通现象,得到了5种不同的贯通模式.杨圣奇[63]基于PFC2D对非平行裂纹试样进行了单轴压缩数值实验,并利用室内实验结果进行了对比和验证.范祥[144]利用PFC3D数值软件对多节理类岩脆性试样单轴加载下的强度演化特征,应力-应变关系以及破坏模式进行了研究......
, 2014, 47(5): 1921-1930. [8] DING Xiaobin, ZHANG Lianyang, ZHU Hehua, et al. Effect of model scale and particle size distribution on pfc3d simulation results[J]. Rock Mechanics and Rock Engineering, 2014......
PFC3D作为仿真平台对犁煤板的物料回收过程进行数值模拟.根据图3中的简化模型,可建立犁煤板物料回收离散单元模型,如图4所示.该模型由几何实体,物料颗粒和边界条件几部分组成.几何实体是指所有可能与物料颗粒发生相互作用的几何结构,此处包括中间煤孔,犁煤板,风筒和集料槽.几何实体通常用不同形状的墙体模型进行描述.风筒和集料槽形状较简单,此处分别用圆柱形墙体和平面墙体进行构建.由于结构相对复杂,犁煤板和煤孔采......
[11-12]研究了单轴压缩下预制张开非连续裂隙节理组的产状和连通率对压缩强度,弹性模量及应力-应变曲线的影响.蒲成志等[13]对预制非连续多裂隙试件进行单轴压缩试验,并运用FLAC3D建立应变软化模型进行数值模拟,探索裂隙角度和分布密度对试件断裂破坏强度的影响规律.FAN等[14]采用PFC3D数值模拟软件研究非连续节理倾角,节理连通率对岩石力学行为的影响,结果表明节理倾角,连通率对岩石的强度,变形......
的降幅越明显,且相比于加载试验,卸荷对试样的破坏更大.室内试验可以直观地体现非贯通节理岩体的破坏,但该方法存在操作复杂,可重复性差,危险系数高且不能直观地观察裂纹扩展过程等缺陷. 目前,越来越多的学者采用数值模拟对节理岩体方向进行研究.KULATILAKE等[10]通过室内物理试验和PFC3D数值试验,研究了节理块体在单轴加载时的力学特性.LEE等[11]制备了含有单节理与双节理的岩体试样,研究了......