检索结果-南通市图书馆

Residual stress measurement and analysis of siliceous slate-containing quartz veins

International Journal of Minerals,Metallurgy and Materials 2023年第12期30卷 2310-2320页

作者： Tao Wang Weiwei Ye Yemeng Tong Naisheng Jiang Liyuan Liu School of Civil and Resources Engineering University of Science and Technology BeijingBeijing 100083China School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083China State Key Laboratory of Strata Intelligent Control and Green Mining Co-founded by Shandong Province and the Ministry of Science and Technology Shandong University of Science and TechnologyQingdao 266590China

Engineering geological disasters such as rockburst have always been a critical factor affecting the safety of coal mine ***,residual stress is considered a feasible method to explain these geomechanical *** this study,electron backscatter diffraction(EBSD)and optical microscopy were used to characterize the rock microcosm.A measuring area that met the requirements of X-ray diffraction(XRD)residual stress measurement was determined to account for the mechanism of rock residual ***,the residual stress of a siliceous slate-containing quartz vein was measured and calculated using the sin^(2) ϕ method equipped with an X-ray *** of microscopic test results showed homogeneous areas with small particles within the millimeter range,meeting the requirements of XRD stress measurement *** was determined as the calibration mineral for slate samples containing quartz *** diffraction patterns of the(324)crystal plane were obtained under different ϕ and φ.The deviation direction of the diffraction peaks was consistent,indicating that the sample tested had residual *** addition,the principal residual stress within the quartz vein measured by XRD was compressive,ranging from 10 to 33 *** maximum principal stress was parallel to the vein trend,whereas the minimum principal stress was perpendicular to the vein ***,the content of the low-angle boundary and twin boundary in the quartz veins was relatively high,which enhances the resistance of the rock mass to deformation and promotes the easy formation of strain concentrations,thereby resulting in residual *** proposed method for measuring residual stress can serve as a reference for subsequent observation and related research on residual stress in different types of rocks.

关键词： residual stress siliceous sand rock microstructure X-ray diffraction electron backscatter diffraction

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Influence of inter-grain cementation stiffness on the effective elastic properties of porous Bentheim sandstone

引用

Journal of rock Mechanics and Geotechnical Engineering 2023年第3期15卷 573-583页

作者： Bin Chen Jiansheng Xiang John-Paul Latham Department of Earth Science and Engineering Faculty of EngineeringImperial College LondonLondonSW72BXUK

Effective elastic properties of porous media are known to be significantly influenced by *** this paper,we investigated the influence of another critical factor,the inter-grain cementation stiffness,on the effective elastic properties of a granular porous rock(Bentheim sandstone)using an advanced numerical workflow with realistic rock microstructure and a theoretical ***,the disparity between the experimentally tested elastic properties of Bentheim sandstone and the effective elastic properties predicted by empirical equations was ***,a micro-computed tomography(CT)-scan based approach was implemented with digital imaging software AVIZO to construct the 3D(three-dimensional)realistic microstructure of Bentheim *** microstructural model was imported to a mechanics solver based on the 3D finite element model with inter-grain boundaries modelled by cohesive *** simulations were run to test the effective elastic properties for different shear and normal intergrain cementation ***,a relation between the macroscale Young’s modulus and inter-grain cementation stiffness was derived with a theoretical model which can also account for porosity *** the numerical and theoretical results indicate the influence of the inter-grain cementation stiffness,on the effective elastic properties is significant for porous *** calibrated normal and shear stiffnesses at the inter-grain boundaries are 1.2×10^(5) and 4×10^(4) GPa/m,respectively.

关键词： Porous sandstone Cohesive finite element model Grain-based model rock microstructure Micro-computed tomography(CT)

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

A discontinuum-based model to simulate compressive and tensile failure in sedimentary rock

引用

Journal of rock Mechanics and Geotechnical Engineering 2013年第5期5卷 378-388页

作者： T.Kazerani Civil Engineering School Faculty of Engineering University of Nottingham University Park

The study presented in this paper discusses a discontinuum-based model for investigating strength and failure in sedimentary *** model has been implemented by UDEC to incorporate an innovative orthotropic cohesive constitutive law for *** reach this purpose,a user-defned model has been established by creating dynamic link libraries(DLLs)and attaching them into the *** model reproduces rock material by a dense collection of irregular-sized deformable particles interacting at their cohesive boundaries which are viewed as flexible contacts whose stress-displacement law is assumed to control the fracture and the fragmentation behaviours of the *** model has been applied to a *** individual and interactional effects of the microstructural parameters on the material compressive and tensile failure responses have been *** addition,the paper presents a new methodical calibration procedure to ft the modelling *** is shown that the model can successfully reproduce the rock mechanical behaviour quantitatively and *** study also shows how discontinuum-based modelling can be used to characterize the relation between the microstructural parameters and the macro-scale properties of a material.

关键词： rock microstructure Microparameter Microfracture Orthotropic cohesive interface Discrete element method

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A discontinuum-based model to simulate compressive and tensile failure in sedimentary rock

A discontinuum-based model to simulate compressive and tensi...

引用

第13届全国岩石动力学学术会议

作者： Tohid Kazerani Civil Engineering School Faculty of EngineeringUniversity of NottinghamUniversity ParkNottinghamNG9 2NNUK

The study presented in this paper discusses a discontinuum-based model for investigating strength and failure in sedimentary *** model has been implemented by UDEC to incorporate an innovative orthotropic cohesive constitutive law for *** reach this purpose,a user-defined model has been established by creating dynamic link libraries(DLLs) and attaching them into the *** model reproduces rock material by a dense collection of irregular-sized deformable particles interacting at their cohesive boundaries which are viewed as flexible contacts whose stress-displacement law is assumed to control the fracture and the fragmentation behaviours of the *** model has been applied to a *** individual and interactional effects of the microstructural parameters on the material compressive and tensile failure responses have been *** addition,the paper presents a new methodical calibration procedure to fit the modelling *** is shown that the model can successfully reproduce the rock mechanical behaviour quantitatively and *** study also shows how discontinuum-based modelling can be used to characterize the relation between the microstructural parameters and the macro-scale properties of a material.

关键词： rock microstructure Microparameter Microfracture Orthotropic cohesive interface Discrete element method

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：