压应力状态下细观非均匀性岩石的损伤局部化和应力应变关系分析

周小平; 张永兴; 哈秋聆; 王建华

压应力状态下细观非均匀性岩石的损伤局部化和应力应变关系分析

1.
重庆大学土木工程学院,重庆 400045;2.上海交通大学建筑工程与力学学院,上海 200030

基金项目: 国家自然科学基金资助项目(59879012;59649008)

详细信息

作者简介:
周小平(1970- ),男,江西瑞金人,博士,副教授(联系人.Tel:+86-23-65405987;Fax:+86-23-65121982;E-mail:zhouxiaopinga@sina.com).

中图分类号: TU45
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出版历程
- 收稿日期: 2002-11-15
- 修回日期: 2004-03-15
- 刊出日期: 2004-09-15

Analysis of the Localization of Damage and the Complete Stress-Strain Relation for Mesoscopic Heterogeneous Brittle Rock Subjected to Compressive Loads

1.
School of Civil Engineering, Chongqing University, Chongqing 400045, P. R. China;

摘要

摘要: 利用摩擦弯折裂纹模型研究了受压条件下细观非均匀性岩石的损伤局部化问题和全过程应力应变关系．模型考虑了裂纹相互作用对损伤局部化和全过程应力应变关系的影响，确定了损伤局部化发生的条件，分析了产生损伤局部化的原因．研究表明全过程应力应变关系包括线弹性阶段、非线性强化阶段、应力降和应变软化阶段．通过和实验对比分析验证了模型的正确性和有效性．
- 压应力 /
- 细观非均匀性岩石 /
- 全过程应力应变关系 /
- 损伤局部化
Abstract: A micromechanics-based model is established.The model takes the interaction among sliding cracks into account,and it is able to quantify the effect of various parameters on the localization condition of damage and deformation for brittle rock subjected to compressive loads.The closed-form explicit expression for the complete stress-strain relation of rock containing microcracks subjected to compressive loads was obtained.It is showed that the complete stress-strain relation includes linear elasticity,nonlinear hardening,rapid stress drop and strain softening.The behavior of rapid stress drop and strain softening is due to localization of deformation and damage.Theoretical predictions have shown to be consistent with the experimental results.
- compressive load /
- mesoscopic heterogeneous rock /
- complete stress-strain relation /
- localization of damage and deformation

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参考文献(12)

[1]	Simo J C, Ju J W. Strain-and stress-based continuum damage models[J].Internat J Solids and Structures,1987,23(7):821—840. doi: 10.1016/0020-7683(87)90083-7
[2]	Ortiz M. A constitutive theory for the inelastic behavior of concrete[J]. Mech Mater,1985,4(1):67—93. doi: 10.1016/0167-6636(85)90007-9
[3]	Ju J W.On two-dimensional self-consistent micromechanical damage models for brittle solids[J].Internat J Solids and Structures,1991,27(2):227—258. doi: 10.1016/0020-7683(91)90230-D
[4]	Nemat-Nasser S, Horii H. Compression induced microcrack growth in brittle solids: axial splitting and shear failure[J].Journal of Geophysics Research,1985,90(B4):3105—3125. doi: 10.1029/JB090iB04p03105
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[9]	Okubo S，Nishimatsu Y，He C. Loading rate dependence of class Ⅱ rock behavior in uniaxial and triaxial compression tests-an application of a proposed new control method[J].Internat J Rock Mech Min Sci & Geomech Abstr,1990,27(6):559—562.
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[11]	ZHOU Xiao-ping,HA Qiu-lin,ZHANG Yong-xing,et al.Analysis of the deformation localization and the complete stress-strain relation for brittle rock subjected to dynamic compressive loads[J].Internat J Rock Mech Min Sci,2004,41(2):311—319. doi: 10.1016/S1365-1609(03)00094-7
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文章访问数: 2487
HTML全文浏览量: 134
PDF下载量: 582
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压应力状态下细观非均匀性岩石的损伤局部化和应力应变关系分析

作者简介:
周小平(1970- ),男,江西瑞金人,博士,副教授(联系人.Tel:+86-23-65405987;Fax:+86-23-65121982;E-mail:zhouxiaopinga@sina.com).

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Analysis of the Localization of Damage and the Complete Stress-Strain Relation for Mesoscopic Heterogeneous Brittle Rock Subjected to Compressive Loads

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压应力状态下细观非均匀性岩石的损伤局部化和应力应变关系分析

作者简介: 周小平(1970- ),男,江西瑞金人,博士,副教授(联系人.Tel:+86-23-65405987;Fax:+86-23-65121982;E-mail:zhouxiaopinga@sina.com).

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Analysis of the Localization of Damage and the Complete Stress-Strain Relation for Mesoscopic Heterogeneous Brittle Rock Subjected to Compressive Loads

计量

出版历程

目录

作者简介:
周小平(1970- ),男,江西瑞金人,博士,副教授(联系人.Tel:+86-23-65405987;Fax:+86-23-65121982;E-mail:zhouxiaopinga@sina.com).