Rock and Soil Mechanics ›› 2019, Vol. 40 ›› Issue (S1): 181-188.doi: 10.16285/j.rsm.2018.1814

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

A brittle-ductile transition constitutive model based on discrete elastic tensors

FAN Yun-hui1, 2, ZHU Qi-zhi1, 2, NI Tao1, 2, ZHANG Kun1, 2, ZHANG Zhen-nan3   

  1. 1. Geotechnical Engineering Research Institute, Hohai University, Nanjing, Jiangsu 210098, China; 2. Key Laboratory of Geomechanics and Embankment Engineering of Ministry of Education, Hohai University, Nanjing, Jiangsu 210098, China; 3. School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiaotong University, Shanghai 200030, China
  • Received:2018-09-26 Online:2019-08-01 Published:2019-08-16
  • Supported by:
    This work was supported by the National Key R & D Program of China(2017YFC1501100) and the National Science Foundation of China(51679068).

PDF (Chinese)

113

Abstract: The crack propagation under external load is generally non-uniform in space, which causes derivative anisotropies of the material. In this context, rock materials can be discretized into a large number of randomly distributed material points connected by force bonds. Based on the directionality of the force bonds, the local elasticity tensor is discretized into a certain number of directional tensors, and the relationship between the force bond modulus and the macroscopic parameters is deduced theoretically. An anisotropic elastic damage constitutive model is developed by considering the fracture effect of the force bonds, In order to simulate the mechanical behavior of brittle to ductile transition of medium porosity rocks in conventional triaxial compression tests, a damage suppression function is introduced into force bond fracture effect. The rationality and effectiveness of the model are verified by simulating the conventional triaxial experiments of Tennessee marble and Indiana limestone and comparing with the experimental data.

Key words: discrete elastic tensors, anisotropic, rock damage, brittle-ductile transition behavior, effect of confining pressure

CLC Number: 

  • TU452
[1] HONG Chen-jie, HUANG Man, XIA Cai-chu, LUO Zhan-you, DU Shi-gui, . Study of size effect on the anisotropic variation coefficient of rock joints [J]. Rock and Soil Mechanics, 2020, 41(6): 2098-2109.
[2] ZHANG Wei, QU Zhan-qing, GUO Tian-kui, SUN Jiang. Numerical simulation of hydraulic fracturing in hot dry rocks under the influence of thermal stress [J]. Rock and Soil Mechanics, 2019, 40(5): 2001-2008.
[3] ZHANG Yu-wei, WENG Xiao-lin, SONG Zhan-ping, XIE Yong-li, . A modified Cam-clay model for structural and anisotropic loess [J]. Rock and Soil Mechanics, 2019, 40(3): 1030-1038.
[4] ZHANG Feng-rui, JIANG An-nan, JIANG Zong-bin, ZHANG Guang-tao. Experimental study of damage and creep property of rock under coupled chemical corrosion and freeze-thaw cycle [J]. Rock and Soil Mechanics, 2019, 40(10): 3879-3888.
[5] YANG Jian-min, HUO Wang-wen，. A character of elliptical regional land subsidence due to horizontal anisotropic permeability [J]. , 2018, 39(8): 2960-2976.
[6] QI Xian-yin, LI Jia-zhuo, WANG Wei,. An anisotropic permeability model of coal containing methane based on different directional modulus reduction ratios [J]. , 2018, 39(2): 635-643.
[7] YANG Xu, MENG Ying-feng, LI Gao, WANG Liang, LI Cheng，. An empirical equation to estimate uniaxial compressive strength for anisotropic rocks [J]. , 2017, 38(9): 2655-2661.
[8] YANG Zhao-zhong, ZHANG Yun-peng, JIA Min, LI Xiao-gang, WEI Zhuo, ZHANG Lu，. Experimental research on influence of low temperature on coal permeability [J]. , 2017, 38(2): 354-360.
[9] LI Hao-ran, YANG Chun-he, ZHAO Wei-gang, LIU Bo, YIN Xue-ying,. Experimental studies of failure characteristics and evolution laws of ultrasonic velocity and acoustic emission for salt rock under triaxial loading [J]. , 2016, 37(9): 2458-2466.
[10] HUANG Zhong-wei , WEI Jiang-wei , LI Gen-sheng , CAI Cheng-zheng，. An experimental study of tensile and compressive strength of rocks under cryogenic nitrogen freezing [J]. , 2016, 37(3): 694-700.
[11] JIANG Ming-jing , FU Chang , LIU Jing-de , LI Tao , . Discrete element analysis of anisotropic structured sand [J]. , 2015, 36(S1): 577-584.
[12] HOU Zhen-kun , YANG Chun-he , GUO Yin-tong , ZHANG Bao-ping ,. Experimental study on anisotropic properties of Longmaxi formation shale under uniaxial compression [J]. , 2015, 36(9): 2541-2550.
[13] CAI Cheng-zheng，LI Gen-sheng，HUANG Zhong-wei，SHEN Zhong-hou，. Experiment study of rock porous structure damage under cryogenic nitrogen freezing [J]. , 2014, 35(4): 965-971.
[14] YANG Dong，LI Hai-bo，XIA Xiang，LUO Chao-wen. Study of blasting-induced dynamic damage of tunnel surrounding rocks under high in-situ stress [J]. , 2014, 35(4): 1110-1116.
[15] ZHOU Cheng ，CHEN Sheng-shui ，HE Jian-cun ，HE Ning ，WU Yan ，ZHANG Gui-rong . Development of a hypo-plastic model for earth-rock dams considering rock crushing and density changing [J]. , 2013, 34(S2): 18-21.
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed   
No Suggested Reading articles found!
Copyright © Rock and Soil Mechanics, All Rights Reserved.
Tel: 027-87198484, 87199252, 87199253, 87198752　E-mail: ytlx@whrsm.ac.cn
Powered by Beijing Magtech Co. Ltd