砂岩力学特性及其改进Duncan-Chang模型

doi:10.13722/j.cnki.jrme.2016.0813

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Abstract In order to study the mechanical properties of sandstone，the conventional triaxial compression tests under different confining pressures were carried out on sandstone specimens. The test results indicate that the peak stress，the strain at peak point and the residual strength of sandstone increase gradually with the increase of the confining pressure. When the confining pressure is less than 15 MPa，the elastic modulus of sandstone increases with the increasing of confining pressure，but the rate of variation is smaller and smaller. When the confining pressure is larger than 15 MPa，the elastic modulus is independent of the confining pressure. The Duncan-Chang constitutive model was revised to describe the stress-strain response in the failure process of sandstone. The method of parameter determination was put forward based on the characteristic of the slop is 0 at the peak point of stress-strain curve. The triaxial compression test results of sandstone were used to evaluate the reasonability of the revised Duncan-Chang model. The comparison of predicted curves from the model and the test results shows that this model can accurately describe the strain softening property of sandstone and the other four stages of the failure process of sandstone under different confining pressures except for the closure stage of cracks. Especially，the model reflects the residual strength after sandstone failure. The further analysis on the model characteristics indicates that in addition to the strain softening property，the revised Duncan-Chang model can also simulate the strain hardening behavior of rock under the action of high confining pressure. So，this model has the good adaptability.

Key words： rock mechanics sandstone mechanical property improved Duncan-Chang model strain softening residual strength strain hardening

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	Articles by authors
	WANG Junbao1
	LIU Xinrong1
	2
	LIU Jun2
	SONG Zhanping1

Cite this article:

WANG Junbao1,LIU Xinrong1,2, et al. Mechanical properties of sandstone and an improved Duncan-Chang constitutive model[J]. , 2016, 35(12): 2388-2397.

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http://rockmech.org/EN/10.13722/j.cnki.jrme.2016.0813 OR http://rockmech.org/EN/Y2016/V35/I12/2388

[19]	尤明庆. 岩石试样的杨氏模量与围压的关系[J]. 岩石力学与工程学报，2003，22(1)：53-60.(YOU Mingqing. Effect of confining pressure on the Young? modulus of rock specimen[J]. Chinese Journal of Rock Mechanics and Engineering，2003，22(1)：53-60.(in Chinese))
[5]	陈剑文，杨春和. 基于细观变形理论的盐岩塑性本构模型研究[J]. 岩土力学，2015，36(1)：117-122.(CHEN Jianwen，YANG Chunhe. Mesoscopic deformation based plastic constitutive model of salt rock[J]. Rock and Soil Mechanics，2015，36(1)：117-122.(in Chinese))
[1]	孟召平，彭苏萍，张慎河. 不同成岩作用程度砂岩物理力学性质三轴试验研究[J]. 岩土工程学报，2003，25(2)：140-143.(MENG Zhaoping，PENG Suping，ZHANG Shenhe. Triaxial test on physical and mechanical properties of sandstone for different diagenesis degree[J]. Chinese Journal of Geotechnical Engineering，2003，25(2)：140-143.(in Chinese))
[3]	苏承东，付义胜. 红砂岩三轴压缩变形与强度特征的试验研究[J]. 岩石力学与工程学报，2014，33(增2)：3 164-3 169.(SU Chengdong，FU Yisheng. Experimental study of triaxial compression deformation and strength characteristics of red sandstone[J]. Chinese Journal of Rock Mechanics and Engineering，2014，33(Supp.2)：3 164-3 169. (in Chinese))
[7]	UNTEREGGER D，FUCHS B，HOFSTETTER G. A damage plasticity model for different types of intact rock[J]. International Journal of Rock Mechanics and Mining Sciences，2015，80：402-411. " target="_blank">
[4]	张玉，徐卫亚，赵海斌，等. 碎屑砂岩三轴压缩下强度和变形特性试验研究[J]. 岩土力学，2014，35(3)：666-674.(ZHANG Yu，XU Weiya，ZHAO Haibin，et al. Experimental investigation on strength and deformation properties of clastic sandstone under triaxial compression[J]. Rock and Soil Mechanics，2014，35(3)：666-674.(in Chinese))
[8]	贾善坡，罗金泽，杨建平，等. 考虑围压影响的盐岩弹塑性损伤本构模型研究[J]. 岩土力学，2015，36(4)：1 549-1 556.(JIA Shanpo，LUO Jinze，YANG Jianping，et al. An elastoplastic damage constitutive model for salt rock considering confining pressure effect[J]. Rock and Soil Mechanics，2015，36(4)：1 549-1 556.(in Chinese))
[10]	朱其志，刘海旭，王伟，等. 北山花岗岩细观损伤力学本构模型研究[J]. 岩石力学与工程学报，2015，34(3)：433-439.(ZHU Qizhi，LIU Haixu，WANG Wei，et al. A micromechanical constitutive damage model for Beishan granite[J]. Chinese Journal of Rock Mechanics and Engineering，2015，34(3)：433-439.(in Chinese))
[12]	周辉，李震，朱国金，等. 基于岩石统一能量屈服准则的硬岩损伤模型[J]. 岩土力学，2016，37(3)：609-615.(ZHOU Hui，LI Zhen，ZHU Guojin，et al. A damage model for hard rock based on unified energy yield criterion of rock[J]. Rock and Soil Mechanics，2016，37(3)：609-615.(in Chinese))
[14]	DENG J，GU D S. On a statistical damage constitutive model for rock materials[J]. Computers and Geosciences，2011，37(2)：122-128.
[15]	WANG Z L，LI Y C，WANG J G. A damage-softening statistical constitutive model considering rock residual strength[J]. Computers and Geosciences，2007，33(1)：1-9.
[2]	杨圣奇，苏承东，徐卫亚. 大理岩常规三轴压缩下强度和变形特性的试验研究[J]. 岩土力学，2006，26(3)：475-478.(YANG Shengqi， SU Chengdong，XU Weiya. Experimental investigation on strength and deformation properties of marble under conventional triaxial compression[J]. Rock and Soil Mechanics，2006，26(3)：475-478.(in Chinese))
[13]	姜永东，鲜学福，粟健. 单一岩石变形特性及本构关系的研究[J]. 岩土力学，2005，26(6)：941-945.(JIANG Yongdong，XIAN Xuefu， SU Jian. Research on distortion of single rock and constitutive relation[J]. Rock and Soil Mechanics，2005，26(6)：941-945.(in Chinese))
[6]	ZHANG Y，SHAO J F，XU W Y，et al. Experimental and numerical investigations on strength and deformation behavior of cataclastic sandstone[J]. Rock Mechanics and Rock Engineering，2015，48(3)：1 083-1 096. " target="_blank">
[9]	GOLSHANI A，OKUI Y，ODAM，et al. A micromechanical model for brittle failure of rock and its relation to crack growth observed in triaxial compression tests of granite[J]. Mechanics of Materials，2006，38(4)：287-303. " target="_blank">
[11]	张振南，葛修润. 一种新的岩石多尺度本构模型：增强虚内键模型及其应用[J]. 岩石力学与工程学报，2012，31(10)：2 037-2 041. (ZHANG Zhennan，GE Xiurun. A new multiscale constitutive model for rock：augmented virtual internal bond model and its application[J]. Chinese Journal of Rock Mechanics and Engineering，2012，31(10)：2 037-2 041.(in Chinese))
[17]	王伟，田振元，朱其志，等. 考虑孔隙水压力的岩石统计损伤本构模型研究[J]. 岩石力学与工程学报，2015，34(增2)：3 676-3 682. (WANG Wei，TIAN Zhenyuan，ZHU Qizhi，et al. Study of statistical damage constitutive model for rock considering pore water pressure[J]. Chinese Journal of Rock Mechanics and Engineering，2015，34(Supp.2)：3 676-3 682.(in Chinese))
[20]	DUNCAN J M，CHANG C Y. Nonlinear analysis of stress and strain in soils[J]. Journal of the Soil Mechanics and Foundation Division，1970，96(5)：1 629-1 653. " target="_blank">
[22]	林卓英，吴玉山，关玲莉，等. 岩石在三轴压缩下脆-延性转化的研究[J]. 岩土力学，1992，13(2)：45-53.(LIN Zhuoying，WU Yushan，GUAN Lingli，et al. Research on the brittle-ductile transition property of rocks under tri-axial compression[J]. Rock and Soil Mechanics，1992，13(2)：45-53.(in Chinese))
[16]	刘新荣，王军保，李鹏，等. 芒硝力学特性及其本构模型[J]. 解放军理工大学学报：自然科学版，2012，13(5)：527-532.(LIU Xinrong，WANG Junbao，LI Peng，et al. Mechanical properties and constitutive model of thenardite[J]. Journal of PLA University of Science and Technology：Natural Science Edition，2012，13(5)：527-532.(in Chinese))
[18]	曹文贵，赵衡，张永杰，等. 考虑体积变化影响的岩石应变软硬化损伤本构模型及参数确定方法[J]. 岩土力学，2011，32(3)：647-654.(CAO Wengui，ZHAO Heng，ZHANG Yongjie，et al. Strain softening and hardening damage constitutive model for rock considering effect of volume change and its parameters determination method[J]. Rock and Soil Mechanics，2011，32(3)：647-654.(in Chinese))
[21]	张卫中，陈从新，余明远. 风化砂岩的力学特性及本构关系研究[J]. 岩土力学，2009，30(增)：33-36.(ZHANG Weizhong，CHEN Congxin，YU Mingyuan. Study of mechanical properties and constitutive relation of weathered sandstone[J]. Rock and Soil Mechanics，2009，30(Supp.)：33-36.(in Chinese)) " target="_blank">