IMHE OpenIR  > 山地灾害与地表过程重点实验室
可破碎块体材料在轴向加卸载时的力学特性
Alternative TitleMechanical Properties of Crushable Blocky Materials Subjected to Axial Loading-unloading
刘恩龙1,2; 何思明2
2011
Source Publication地下空间与工程学报
ISSN1673-0836
Volume7Issue:3Pages:1191-1195+1202
SubtypeArticle
Contribution Rank2
Abstract应用双轴压缩试验设备对棱柱状颗粒材料进行了轴向加载、卸载和再加载应力路径试验,观察到在不同侧向应力状态下棱柱状颗粒材料在轴向加卸载过程中开裂破损并逐渐形成破损带的过程。当侧向应力较低时,颗粒材料试样的变形主要来自颗粒的错动和破裂;且随着竖向应变的增加,试样体积先压缩后膨胀;加载初期侧向稍有收缩,随后侧向则一直膨胀。当侧向应力较高时,颗粒材料试样的变形主要来自颗粒间压缩、颗粒的压缩和压碎;且随着竖向应变的增加,体积一直收缩,侧向应力越大,体积收缩的越多;侧向则一直压缩。卸载-再加载轴向应力循环中,低侧向应力时可恢复应变较大,高侧向应力时可恢复性应变较小。
Other AbstractThe biaxial compression apparatus is employed to conduct tests on prism-shaped granular materials with stress path of axial loading-unloading and reloading.The whole process of fracturing and forming the breakage bands of the granular materials subjected to axial loading-unloading are observed under different lateral pressures.When the lateral pressure is relative low,the deformation of the sample composed of granular materials mainly comes from the slip and crush of the granular materials;and with the increase of axial strain the volume of the sample first contracts then expands;the lateral deformation slightly contracts at the initial stage of loading and then extrudes all the time.When the lateral pressure is relative high,the deformation of the sample mainly comes from the compression between granular materials,and granular materials compression and crush;and with the increase of axial strain the volume of the sample always contracts,contracting much with higher lateral pressure;the lateral deformation contracts all the time.During the stress cycle of axial loading-unloading,the reversible deformation is bigger with lower lateral pressure and smaller with higher lateral pressure.
Keyword加卸载 双轴试验 破损机理 破损带
Indexed ByCSCD
Language中文
CSCD IDCSCD:4426667
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/25958
Collection山地灾害与地表过程重点实验室
Corresponding Author刘恩龙
Affiliation1.四川大学水力学与山区河流开发保护重点实验室水利水电学院;
2.中国科学院水利部成都山地灾害与环境研究所
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Corresponding Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
刘恩龙,何思明. 可破碎块体材料在轴向加卸载时的力学特性[J]. 地下空间与工程学报,2011,7(3):1191-1195+1202.
APA 刘恩龙,&何思明.(2011).可破碎块体材料在轴向加卸载时的力学特性.地下空间与工程学报,7(3),1191-1195+1202.
MLA 刘恩龙,et al."可破碎块体材料在轴向加卸载时的力学特性".地下空间与工程学报 7.3(2011):1191-1195+1202.
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