考虑颗粒破碎的堆石体三维随机多面体细观数值模拟

Abstract
Figure/Table
References
Related Citation (15)

Download: PDF (783 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract Based on the stochastic granular discontinuous deformation(SGDD) method，a cohesive zone model is employed to simulate the breakage of coarse aggregates. In this model the cohesive interface elements are inserted into the region of coarse aggregates；and the constitutive response of cohesive element is governed by an energy-based damage evolution law. If the interface between these sub-particles breaks，the breakage will happen. By using this model，it is possible to study the influence of particle breakage on the macroscopic properties of the rockfill，such as volumetric strain，shear strength and dilatancy angle. The numerical simulation results reveal that the strength of the coarse-grained material can significantly decrease due to particle breakage. The mechanism of this phenomenon lies in the weakening effect of dilatation due to particle breakage. Along with particle breakage，the acoustic emission(AE) occurs；and the AE count under higher confining pressure is greater than that under lower confining pressure. In the shear process，the contact normal orientation between particles is inclining gradually from horizontal direction to vertical direction. Furthermore，the main direction of normal contact force is the same as the loading direction；and the average normal contact force between particles increases gradually.

Key words： hydraulic engineering rockfill particle breakage mesomechanics stochastic simulation cohesive zone model

Received: 24 December 2010

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors

Cite this article:

URL:

https://rockmech.whrsm.ac.cn/EN/Y2011/V30/I8/1671

[1] 日本土质工学会. 粗粒料的现场压实[M]. 郭熙灵，文丹译. 北京：中国水利水电出版社，1998：4–7.(Japanese Society of Soil Mechanics and Foundation Engineering. Field compaction of coarse- grained materials[M]. Translated by GUO Xiling，WEN Dan. Beijing：China Water Power Press，1998：4–7.(in Chinese)) [2] MARSAL R J. Mechanical properties of rockfill[M]. New York：John Wiley and Sons，1973：109–200. [3] HARDIN B O. Crushing of soil particles[J]. Journal of Geotechnical Engineering，1985，11(10)：1 177–1 192. [4] 郭熙灵，胡辉，包承纲. 堆石料颗粒破碎对剪胀性及抗剪强度的影响[J]. 岩土工程学报，1997，19(3)：83–88.(GUO Xiling，HU Hui，BAO Chenggang. Experimental studies of the effects of grain breakage on the dilatancy and shear strength of rockfill[J]. Chinese Journal of Geotechnical Engineering，1997，19(3)：83–88.(in Chinese)) [5] VARADARAJAN A，SHARMA K G，VENKATACHALAM K，et al. Testing and modeling two rockfill materials[J]. Journal of Geotechnical and Geoenvironmental Engineering，2003，129(3)：206–218. [6] 刘汉龙，秦红玉，高玉峰，等. 堆石粗粒料颗粒破碎试验研究[J]. 岩土力学，2005，26(4)：562–566.(LIU Hanlong，QIN Hongyu，GAO Yufeng，et al. Experimental study on particle breakage of rockfill and coarse aggregates[J]. Rock and Soil Mechanics，2005，26(4)：562–566.(in Chinese)) [7] 孔德志，张丙印，孙逊. 人工模拟堆石料颗粒破碎应变的三轴试验研究[J]. 岩土工程学报，2009，31(3)：464–469.(KONG Dezhi，ZHANG Bingyin，SUN Xun. Triaxial tests on particle breakage strain of artificial rockfill materials[J]. Chinese Journal of Geotechnical Engineering，2009，31(3)：464–469. (in Chinese)) [8] 魏松，朱俊高，钱七虎，等. 粗粒料颗粒破碎三轴试验研究[J]. 岩土工程学报，2009，31(4)：533–538.(WEI Song，ZHU Jungao，QIAN Qihu，et al. Particle breakage of coarse-grained materials in triaxial tests[J]. Chinese Journal of Geotechnical Engineering，2009，31(4)：533–538.(in Chinese)) [9] 高玉峰，张兵，刘伟，等. 堆石料颗粒破碎特征的大型三轴试验研究[J]. 岩土力学，2009，30(5)：1 237–1 246.(GAO Yufeng，ZHANG Bing，LIU Wei，et al. Experimental study on particle breakage behavior of rockfills in large-scale triaxial tests[J]. Rock and Soil Mechanics，2009，30(5)：1 237–1 246.(in Chinese)) [10] 杨光，张丙印，于玉贞，等. 不同应力路径下粗粒料的颗粒破碎试验研究[J]. 水利学报，2010，43(3)：338–342.(YANG Guang，ZHANG Bingyin，YU Yuzhen，et al. An experimental study on particle breakage of coarse-grained materials under various stress paths[J]. Journal of Hydraulic Engineering，2010，43(3)：338–342.(in Chinese)) [11] ROBERTSON D，BOLTON M D. DEM simulations of crushable grains and soils[C]// Proceedings of the 4th International Conference on Micromechanics of Granular Media Powders and Grains. Sendai，Japan：[s.n.]，2001：623–626. [12] CHENG Y P，NAKATA Y，BOLTON M D. Discrete element simulation of crushable soil[J]. Geotechnique，2003，53(7)：633–641. [13] LOBO-GUERRERO S，VALLEJO L E，VESGA L F. Visualization of crushing evolution in granular materials under compression using DEM[J]. International Journal of Geomechanics，2006，6(3)：195–200. [14] 史旦达，周健，贾敏才，等. 考虑颗粒破碎的砂土高应力一维压缩特性颗粒流模拟[J]. 岩土工程学报，2007，29(5)：736–742.(SHI Danda，ZHOU Jian，JIA Mincai，et al. Numerical simulations of particle breakage property of sand under high pressure 1D compression condition by use of particle flow code[J]. Chinese Journal of Geotechnical Engineering，2007，29(5)：736–742.(in Chinese)) [15] 刘君，刘福海，孔宪京. 考虑破碎的堆石料颗粒流数值模拟[J]. 岩土力学，2008，29(增1)：107–112.(LIU Jun，LIU Fuhai，KONG Xianjing. Particle flow code numerical simulation of particle breakage of rockfill[J]. Rock and Soil Mechanics，2008，29(Supp.1)：107–112. (in Chinese)) [16] HOSSEININIA E S，MIRGHASEMI A A. Numerical simulation of breakage of two-dimensional polygon-shaped particles using discrete element method[J]. Powder Technology，2006，166(2)：100–112. [17] HOSSEININIA E S，MIRGHASEMI A A. Effect of particle breakage on the behavior of simulated angular particle assemblies[J]. China Particuology，2007，5(5)：328–336. [18] MUNJIZA A. The combined finite-discrete element method[M]. New York：John Wiley and Sons，2004：20–25. [19] LI S H，ZHAO M H，WANG Y N. A new computation model of there-dimension DEM-block and particle model[J]. International Journal of Rock Mechanics and Mining Sciences，2004，41(3)：43–63. [20] MORRIS J P，RUBIN M B，BLOCK G I，et al. Simulations of fracture and fragmentation of geologic materials using combined FEM/DEM analysis[J]. International Journal of Impact Engineering，2006，33(4)：463–473. [21] 周伟，常晓林，周创兵，等. 堆石体应力变形细观模拟的随机散粒体不连续变形模型及其应用[J]. 岩石力学与工程学报，2009，28(3)：491–499.(ZHOU Wei，CHANG Xiaolin，ZHOU Chuangbing，et al. Stochastic granule discontinuous deformation model of rockfill and its application[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(3)：491–499.(in Chinese)) [22] 马刚，周伟，常晓林，等. 锚杆加固散粒体的作用机制研究[J]. 岩石力学与工程学报，2010，29(8)：1 577–1 584.(MA Gang，ZHOU Wei，CHANG Xiaolin，et al. Study of anchorage mechanism of granular mixture[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(8)：1 577–1 584.(in Chinese)) [23] XU X P，NEEDLEMAN A. Numerical simulations of fast crack growth in brittle solids[J]. Journal of Mechanics and Physics of Solids，1994，42(9)：1 397–1 434. [24] NGUYEN O，REPETTO E A，ORTIZ M，et al. A cohesive model of fatigue crack growth[J]. International Journal of Fracture，2001，110(4)：351–369. [25] YANG B，MALL S，RAVI-CHANDAR K. A cohesive zone model for fatigue crack growth in quasi-brittle materials[J]. International Journal of Solids and Structures，2001，38(22/23)：3 927–3 944. [26] SONG S H，PAULINO G H，BUTTLAR W G. Simulation of crack propagation in asphalt concrete using an intrinsic cohesive zone model[J]. Journal of Engineering Mechanics，2006，132(11)：1 215– 1 223. [27] 梁正召，唐春安，张永彬，等. 岩石三维破裂过程的数值模拟研究[J]. 岩石力学与工程学报，2006，25(5)：931–936.(LIANG Zhengzhao，TANG Chun?an，ZHANG Yongbin，et al. 3D numerical simulation of failure process of rock[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(5)：931–936.(in Chinese)) [28] BENZEGGAGH M L，KENANE M. Measurement of mixed mode delamination fracture toughness of unidirectional glass/epoxy composites with mixed-mode bending apparatus[J]. Composites Sciences and Technology，1996，56(4)：439–449. [29] 张楚汉，金峰. 岩石和混凝土离散–接触–断裂分析[M]. 北京：清华大学出版社，2008：52–55.(ZHANG Chuhan，JIN Feng. Discrete- contact-fracture analysis of rock and concrete[M]. Beijing：Tsinghua University Press，2008：52–55.(in Chinese)) [30] 司洪洋. 论无黏性砂砾石与堆石的力学性质[J]. 岩土工程学报，1990，12(6)：32–41.(SI Hongyang. Discussion on the mechanical behavior of uncemented gravel and rockfill[J]. Chinese Journal of Geotechnical Engineering，1990，12(6)：32–41.(in Chinese)) [31] 李广信. 高等土力学[M]. 北京：清华大学出版社，2004：8–10.(LI Guangxin. Advanced soil mechanics[M]. Beijing：Tsinghua University Press，2004：8–10.(in Chinese)) [32] IWASHITA K，ODA M. Micro-deformation mechanism of shear bending process based on modified distinct element method[J]. Powder Technology，2000，109(1/2/3)：192–205. [33] 史旦达，周健，刘文白，等. 砂土直剪力学性状的非圆颗粒模拟与宏细观机制研究[J]. 岩土工程学报，2010，32(10)：1 557–1 565. (SHI Danda，ZHOU Jian，LIU Wenbai，et al. Exploring macro- and micro-scale responses of sand in direct shear tests by numerical simulations using non-circular particles[J]. Chinese Journal of Geotechnical Engineering，2010，32(10)：1 557–1 565.(in Chinese)) [34] ROTHENBURG L，BATHURST R J. Analytical study of induced anisotropy in idealized granular materials[J]. Geotechnique，1989，39(4)：601–614.