An Analysis Model of UDEC for Crack Propagation and Numerical Simulations for Specimens with Double Pre-Existing Cracks

YE Qiongyao; WEI Lide; SHAO Yu; LI Meng

doi:10.3724/j.gyjzG22100101

Volume 54 Issue 7

Jul. 2024

Turn off MathJax

Article Contents

Article Navigation > INDUSTRIAL CONSTRUCTION > 2024 > 54(7): 196-201

YE Qiongyao, WEI Lide, SHAO Yu, LI Meng. An Analysis Model of UDEC for Crack Propagation and Numerical Simulations for Specimens with Double Pre-Existing Cracks[J]. INDUSTRIAL CONSTRUCTION, 2024, 54(7): 196-201. doi: 10.3724/j.gyjzG22100101

Citation:

YE Qiongyao, WEI Lide, SHAO Yu, LI Meng. An Analysis Model of UDEC for Crack Propagation and Numerical Simulations for Specimens with Double Pre-Existing Cracks[J]. INDUSTRIAL CONSTRUCTION, 2024, 54(7): 196-201. doi: 10.3724/j.gyjzG22100101

Citation:

PDF( 5290 KB)

An Analysis Model of UDEC for Crack Propagation and Numerical Simulations for Specimens with Double Pre-Existing Cracks

doi: 10.3724/j.gyjzG22100101

YE Qiongyao¹,
WEI Lide^{2
,
,},
SHAO Yu¹,
LI Meng³

1. Guangxi Communications Design Group Co., Ltd., Nanning 530029, China;
2. Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China;
3. Gezhouba Group Transportation Investment Co., Ltd., Baise 533500, China

Received Date: 2022-10-01
Available Online: 2024-08-16

Abstract

Abstract

An UDEC analysis model composed of triangular blocks for crack propagation was proposed. In the proposed model,a FEM mesh of triangular elements was generated in the interesting area by a finite element software first. Then the FEM mesh was converted into an UDEC mesh by a transformation program. The UDEC mesh was composed of triangular blocks and joints on the boundary of simulated blocks. The joints included virtual joints and real joints. These virtual joint interfaces provided paths along which cracks could generate and propagate. Its failure was controlled by the model of Joint model SS which was provide by UDEC. The proposed analysis model of UDEC was used for simulating the generation,propagation and coalescence of rock cracks. The transformation program of the proposed model was developed. To verify the correctness of the algorithm,three numerical examples of test samples with double parallel pre-existing cracks under uniaxial compression were computed. The simulated results were compared with the ones of existing tests. The simulated laws of crack propagation were in accordance with the phenomena observed in the tests. Those indicated that the proposed UDEC analysis model for cracks propagation was correct and effective.
- rock mechanics,
- crack propagation,
- discrete element,
- UDEC,
- simulation

FullText(HTML)

References(22)

References

[1]	俞绍诚.水力压裂技术手册[M]. 北京:石油工业出版社, 2010.
[2]	焦玉勇, 张秀丽, 刘泉声, 等.用非连续变形分析方法模拟岩石裂纹扩展[J].岩石力学与工程学报, 2007, 26(4):682-691.
[3]	KOMORI K.Ductile fracture criteria for simulating shear by node separation method[J].Theoretical and Applied Fracture Mechanics, 2005, 43:101－114.
[4]	KOMORI K.Simulation of shearing by node separation method[J].Computers and Structures, 2001, 45:197－207.
[5]	唐春安, 王述红, 傅宇方. 岩石破裂过程数值试验[M]. 北京:科学出版社, 2003.
[6]	TANG C A, LIN P, WONG R H C, et al.Analysis of crack coalescence in rock-like materials containing three flaws: Part II: numerical approach[J]. International Journal of Rock Mechanics & Mining Sciences, 2001, 38: 925-939.
[7]	张振南, 葛修润, 李永和.虚拟多维内连结键模型(VMIB)在岩石类材料单轴破坏中的应用[J].岩土工程学报, 2006, 28(4):504-509.
[8]	张永彬, 唐春安, 梁正召, 等.岩石破裂过程分析系统并行计算方法研究[J].岩石力学与工程学报, 2006, 25(9):1795-1801.
[9]	马文强, 王同旭.多围压脆岩压缩破坏特征及裂纹扩展规律[J].岩石力学与工程学报, 2018, 37(4):898-908.
[10]	KAZERANI T, ZHAO J. Micromechanical parameters in bonded particle method for modelling of brittle material failure[J]. International Journal for Numerical and Analytical Methods in Geomechanics, 2010, 34(18): 1877-1895.
[11]	GAO F. Simulation of failure mechanisms around underground coal mine openings using discrete element modelling[D]. Vancouver:Simon Fraser University, 2013.
[12]	LAN H, MARTIN C D, HU B. Effect of heterogeneity of brittle rock on micromechanical extensile behavior during compression loading[J/OL]. Journal of Geophysical Research, 2010, 115(B1): B01202[2022-10-01].https://doi.org/10.1029/2009JB006496.
[13]	NICKSIAR M, MARTIN C D. Factors Affecting Crack Initiation in Low Porosity Crystalline Rocks[J]. Rock Mechanics & Rock Engineering, 2014, 47(4):1165-1181.
[14]	GAO F, STEAD D, ELMO D. Numerical simulation of microstructure of brittle rock using a grain-breakable distinct element grain-based model[J]. Computers & Geotechnics, 2016, 78:203-217.
[15]	谭鑫, HEINZ K. 含层理构造的非均质片麻岩巴西劈裂试验及离散单元法数值模拟研究[J]. 岩石力学与工程学报, 2014, 33(5):938-946.
[16]	马文强, 王振慧. 均质度对脆岩压缩破坏及裂纹扩展的影响规律[J]. 信阳师范学院学报(自然科学版), 2020, 33(4):689-696.
[17]	YAN M. Numerical modelling of brittle fracture and step-path failure: from laboratory to rock slope scale[D]. Benaby: Simon Fraser University, 2008.
[18]	ZHAO C, ZHOU Y M, ZHAO C F, et al. Cracking processes and coalescence modes in rock-like specimens with two parallel pre-existing cracks[J]. Rock Mechanics and Rock Engineering, 2018, 51(11): 3377-3393.
[19]	鲍如意, 赵程, 周依盟, 等. 含预制双裂纹试样岩桥贯通模式的数值研究[J]. 水利水运工程学报, 2021(4):19-28.
[20]	GAO F Q, STEAD D. The application of a modified Voronoi logic to brittle fracture modeling at the laboratory and field scale[J]. International Journal of Rock Mechnics and Mining Sciences, 2014, 68:1-14.
[21]	Itasca Consulting Group Inc. UDEC(universal distinct element code)[M].Version 4.1. Minneapolis:Itasca, 2011.
[22]	朱维申, 李术才, 陈卫忠.节理岩体破坏机制和锚固效应及工程应用[M]. 北京:科学出版社, 2002.