Fracture failure mechanism and fracture criterion of compacted clay under compression and shear action

HUANG Shi-yuan; WANG Jun-jie; WANG Ai-guo; JI En-yue; GUO Wan-li; JIN Song-yang

doi:10.11779/CJGE202103012

Volume 43 Issue 3

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Chinese Journal of Geotechnical Engineering > 2021 > 43(3): 492-501. > DOI: 10.11779/CJGE202103012

HUANG Shi-yuan, WANG Jun-jie, WANG Ai-guo, JI En-yue, GUO Wan-li, JIN Song-yang. Fracture failure mechanism and fracture criterion of compacted clay under compression and shear action[J]. Chinese Journal of Geotechnical Engineering, 2021, 43(3): 492-501. DOI: 10.11779/CJGE202103012

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Fracture failure mechanism and fracture criterion of compacted clay under compression and shear action

1.
Key Laboratory of Earth-Rock Dam Failure Mechanism and Safety Control Techniques, Ministry of Water Resources, Nanjing Hydraulic Research Institute, Nanjing 210029, China
2.
Diagnostic Technology on Health of Hydraulic Structures Engineering Research Center of Chongqing Education Commission of China, Chongqing Jiaotong University, Chongqing 400074, China
3.
Yalong River Hydropower Development Co., Ltd., Chengdu 610051, China
4.
State Key Laboratory of Mountain Bridge and Tunnel Engineering, Chongqing Jiaotong University, Chongqing 400074, China

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Received Date: December 08, 2019
Available Online: December 04, 2022

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Abstract

Abstract

Soil cracks are often considered to be caused by tensile-shear stress. In actual engineering, the compacted clay is mostly under compressive-shear stress state. In order to explore the crack initiation mechanism of the existing cracks in the compacted clay under compressive-shear stress state, the stress field and fracture criterion of the closed crack are analyzed theoretically. The uniaxial compression tests on the compacted clay with central cracks are carried out. The influence of dip angle, length and shape of cracks on the tensile fracture behavior of the compacted clay are investigated. The applicability of the compression-shear closed-crack tension fracture criterion considering T-stress in the compacted clay is verified, and the compression-shear tension fracture mechanism of closed cracks in the compacted clay is revealed. According to the comparative analysis of the test results and the theoretical prediction curve, the critical size r_c of the compacted clay is about 2 mm, which is obviously smaller than the estimated value of 12 mm by the empirical formula used in the rock field. Through detailed discussion, it is shown that the formula applied in the rock field is not suitable for the compacted clay. In addition, the T-stress is introduced tentatively to establish a compression-shear-tension fracture criterion for open cracks. The differential initiation behavior of closed and open cracks is explained, and its limitations are shown.
- compressive shear stress,
- closed crack,
- fracture criterion,
- compacted clay,
- T-stress

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References (32)

References

[1]	张丙印, 温彦锋, 朱本珍. 土工构筑物和边坡工程发展综述——作用机理与数值模拟方法[J]. 土木工程学报, 2016, 49(8): 1-15. https://www.cnki.com.cn/Article/CJFDTOTAL-TMGC201608001.htm ZHANG Bing-yin, WEN Yan-feng, ZHU Ben-zhen, et al. Development review of geotechnical structures and slope engineering-action mechanism and numerical simulation method[J]. Chinese Journal of Civil Engineering, 2016, 49(8): 1-15. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-TMGC201608001.htm
[2]	吉恩跃, 陈生水, 傅中志. 土心墙堆石坝坝顶裂缝扩展有限元模拟[J]. 岩土工程学报, 2018, 40(增刊2): 17-21. https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC2018S2006.htm JI En-yue, CHEN Sheng-shui, FU Zhong-zhi. Numerical simulation of crest cracks in an earth core rockfill dam using extended finite element method[J]. Chinese Journal of Geotechnical Engineering, 2018, 40(S2): 17-21. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC2018S2006.htm
[3]	凌华, 王伟, 王芳. 砾石土心墙料水力劈裂试验研究[J]. 岩土工程学报, 2018, 40(8): 1444-1448. https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC201808011.htm LING Hua, WANG Wei, WANG Fang. Experimental study on hydraulic fracture of gravelly soil core[J]. Chinese Journal of Geotechnical Engineering, 2018, 40(8): 1444-1448. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC201808011.htm
[4]	CAMP S, GOURC J P, PLE O. Landfill clay barrier subjected to cracking: multi-scale analysis of bending tests[J]. Applied Clay Science, 2010, 48(3): 384-392. doi: 10.1016/j.clay.2010.01.011
[5]	SKEMPTON A W, SCHUSTER R L, PETLEY D J, et al. Joints and fissures in the london clay at wraysbury and edgware[J]. Géotechnique, 1970, 20: 208-209. doi: 10.1680/geot.1970.20.2.208
[6]	THUSYANTHAN N I, TAKE W A, MADABHUSHI S P G, et al. Crack initiation in clay observed in beam bending[J]. Géotechnique, 2007, 57(7): 581-594. doi: 10.1680/geot.2007.57.7.581
[7]	WANG J J, ZHU J G, CHIU C F, et al. Experimental study on fracture toughness and tensile strength of a clay[J]. Engineering Geology, 2007, 94(1/2): 65-75.
[8]	RAO Q, SUN Z, STEPHANSSON O, et al. Shear fracture (Mode II) of brittle rock[J]. International Journal of Rock Mechanics and Mining Sciences, 2003, 40(3): 355-375. doi: 10.1016/S1365-1609(03)00003-0
[9]	JI W, PAN P, LIN Q, et al. Do disk-type specimens generate a mode II fracture without confinement?[J]. International Journal of Rock Mechanics and Mining Sciences, 2016, 87: 48-54. doi: 10.1016/j.ijrmms.2016.05.010
[10]	LIN H, YANG H T, WANG Y X, et al. Determination of the stress field and crack initiation angle of an open flaw tip under uniaxial compression[J]. Theoretical and Applied Fracture Mechanics, 2019, 104: 102358. doi: 10.1016/j.tafmec.2019.102358
[11]	郑安兴, 罗先启. 压剪应力状态下岩石复合型断裂判据的研究[J]. 岩土力学, 2015(7): 1892-1898. https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX201507014.htm ZHENG An-xing, LUO Xian-qi. Research on combined fracture criterion of rock under compression-shear stress[J]. Rock and Soil Mechanics, 2015(7): 1892-1898. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX201507014.htm
[12]	高赛红, 曹平, 汪胜莲. 水压力作用下岩石中Ⅰ和Ⅱ型裂纹断裂准则[J]. 中南大学学报(自然科学版), 2012, 43(3): 1087-1091. https://www.cnki.com.cn/Article/CJFDTOTAL-ZNGD201203046.htm GAO Sai-hong, CAO Ping, WANG Sheng-lian. Analysis of fracture criterion of Ⅰ and Ⅱ type of crack in rock masses under hydraulic pressure[J]. Journal of Central South University (Science and Technology), 2012, 43(3): 1087-1091. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-ZNGD201203046.htm
[13]	ZHAO Y, WANG Y, TANG L. The compressive-shear fracture strength of rock containing water based on Druker-Prager failure criterion[J]. Arabian Journal of Geosciences, 2019, 12(15): 452. doi: 10.1007/s12517-019-4628-1
[14]	周家文, 徐卫亚, 石崇. 基于破坏准则的岩石压剪断裂判据研究[J]. 岩石力学与工程学报, 2007(6): 1194-1201. doi: 10.3321/j.issn:1000-6915.2007.06.014 ZHOU Jia-wen, XU Wei-ya, SHI Chong. Investigation on compression-shear fracture criterion of rock based on failure criteria[J]. Chinese Journal of Geotechnical Engineering, 2007(6): 1194-1201. (in Chinese) doi: 10.3321/j.issn:1000-6915.2007.06.014
[15]	李世愚, 和泰名, 尹祥础. 岩石断裂力学导论[M]. 合肥: 中国科学技术大学出版社, 2010. LI Shi-yu, HE Tai-ming, YIN Xiang-chu. Introduction of Rock Fracture Mechanics[M]. Hefei: University of Science and Technology of China Press, 2010.
[16]	ZHANG X, WONG L N Y. Cracking processes in rock-like material containing a single flaw under uniaxial compression: a numerical study based on parallel bonded-particle model approach[J]. Rock Mechanics and Rock Engineering, 2012, 45(5): 711-737.
[17]	SMITH D J, AYATOLLAHI M R, PAVIER M J. The role of T-stress in brittle fracture for linear elastic materials under mixed-mode loading[J]. Fatigue Fracture of Engineering Materials and Structures, 2001, 24(2): 137-150. doi: 10.1046/j.1460-2695.2001.00377.x
[18]	LIU H. Wing-crack initiation angle: a new maximum tangential stress criterion by considering T-stress[J]. Engineering Fracture Mechanics, 2018, 199: 380-391. doi: 10.1016/j.engfracmech.2018.06.010
[19]	朱俊高, 王俊杰, 张辉. 土石坝心墙水力劈裂机制研究[J]. 岩土力学, 2007(3): 487-492. doi: 10.3969/j.issn.1000-7598.2007.03.011 ZHU Jun-gao, WANG Jun-jie, ZHANG Hui. Study on mechanism of hydraulic fracturing in core of earth-rockfill dam[J]. Rock and Soil Mechanics, 2007(3): 487-492. (in Chinese) doi: 10.3969/j.issn.1000-7598.2007.03.011
[20]	王俊杰. 基于断裂力学的土石坝心墙水力劈裂研究[D]. 南京: 河海大学, 2005. WANG Jun-jie. Study on Hydraulic Fracturing in Core of Earth-Rock Fill Dam Based on Fracture Mechanics[D]. Nanjing: Hohai University, 2005. (in Chinese)
[21]	WILLIAMS J G, EWING P D. Fracture under complex stress —the angled crack problem[J]. International Journal of Fracture Mechanics, 1972, 8(4): 441-446. doi: 10.1007/BF00191106
[22]	ALIHA M R M, AYATOLLAHI M R. Two-parameter fracture analysis of SCB rock specimen under mixed mode loading[J]. Engineering Fracture Mechanics, 2013, 103: 115-123. doi: 10.1016/j.engfracmech.2012.09.021
[23]	TANG S B, BAO C Y, LIU H Y. Brittle fracture of rock under combined tensile and compressive loading conditions[J]. Canadian Geotechnical Journal, 2017, 54(1): 88-101. doi: 10.1139/cgj-2016-0214
[24]	SCHMIDT R. A microcrack model and its significance to hydraulic fracturing and fracture toughness testing[J]. US Symposium on Rock Mechanics, 1980, 18(5): 581-590.
[25]	AYATOLLAHI M R, ALIHA M R M. On the use of Brazilian disc specimen for calculating mixed mode I-II fracture toughness of rock materials[J]. Engineering Fracture Mechanics, 2008, 75(16): 4631-4641. doi: 10.1016/j.engfracmech.2008.06.018
[26]	赵彦琳, 范勇, 朱哲明, 等. T应力对闭合裂纹断裂行为的理论和实验研究[J]. 岩石力学与工程学报, 2018, 37(6): 1340-1349. https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX201806003.htm ZHAO Yan-lin, FAN Yong, ZHU Ze-ming, et al. Analytical and experimental study on the effect of T-stress on behavior of closed cracks[J]. Chinese Journal of Rock Mechanics and Engineering, 2018, 37(6): 1340-1349. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX201806003.htm
[27]	WANG J J, HUANG S Y, GUO W L, et al. Experimental study on fracture toughness of a compacted clay using semi-circular bend specimen[J]. Engineering Fracture Mechanics, 2020, 224: 106814. doi: 10.1016/j.engfracmech.2019.106814
[28]	蒲成志, 杨仕教, 张春阳. 张开度影响的裂隙体破断机制探讨[J]. 岩土工程学报, 2019(10): 1836-1844. https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC201910009.htm PU Cheng-zhi, YANG Shi-jiao, ZHANG Chun-yang. Fracture mechanism of fracture body affected by opening degree[J]. Chinese Journal of Geotechnical Engineering, 2019(10): 1836-1844. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC201910009.htm
[29]	郭少华. 岩石类材料压缩断裂的实验与理论研究[D]. 长沙: 中南大学, 2003. GUO Shao-hua. The Experimental and Theoretical Investigation on Fracture of Rock-Type Materials under Compressive Loading[D]. Changsha: Central South University, 2003. (in Chinese)
[30]	MUSKHELISHVILI N. Some Basic Problems of the Mathematical Theory of Elasticity[M]. Leyden: Noordhoff, 1953.
[31]	HUA W, DONG S, FAN Y, et al. Investigation on the correlation of mode II fracture toughness of sandstone with tensile strength[J]. Engineering Fracture Mechanics, 2017, 184: 249-258. doi: 10.1016/j.engfracmech.2017.09.009
[32]	BOBET A. The initiation of secondary cracks in compression[J]. Engineering Fracture Mechanics, 2000, 66(2): 187-219. doi: 10.1016/S0013-7944(00)00009-6