中南大学学报（自然科学版）2016，Vol.47Issue(11)：3759-3764,6.DOI:10.11817/j.issn.1672-7207.2016.11.020
板岩单轴压缩各向异性力学特征
Anisotropic mechanical characteristics of slate in uniaxial compression
摘要
Abstract
Considering the anisotropy, the slates with obvious bedding planes were chosen to make the uniaxial compression tests. The change regulations of the mechanical parameters of different inclinations of bedding planes were analyzed. The results show that the weak bedding surface is an important reason for the anisotropy of the mechanical parameters, the strength characteristics and the failure modes of the slate. The uniaxial compressive strength and the elastic modulus of the slate both decrease first and then increase with the increase of the inclination of the bedding plane. As the bedding orientation changes, the curves both present U-shape. The anisotropic ratio of the slate’s uniaxial compressive strength is 2.8 and it belongs to intermediate level. The anisotropic parameter of the slate’s deformation modulus is 1.7. The whole rock Poisson ratio increases with the increase of the bedding planes’ inclination. But the change regulations of the same location in different specimens are different. The bedding plane with different inclinations is an important reason for different failure modes. Tensile splitting across bedding planes occurs forβ=0° sample;single shear failure along bedding planes occurs for β=30° and β=45° samples; comprehensive failure of shear failure along bedding planes and tensile splitting across bedding planes occurs for β=70° sample and tensile splitting along bedding planes occurs forβ=90° sample.关键词
板岩/单轴压缩/各向异性/层理面/破裂模式Key words
slate/uniaxial compression/anisotropy/bedding plane/failure mode分类
建筑与水利引用本文复制引用
王聪聪,李江腾,林杭,廖峻,王佩新,王思青..板岩单轴压缩各向异性力学特征[J].中南大学学报（自然科学版）,2016,47(11):3759-3764,6.基金项目
国家自然科学基金资助项目(51374246，51304240)；湖南省科技计划项目(2013FJ6002)；中南大学硕士生自主探索创新项目(2015zzts260)(Projects(51374246,51304240) supported by the National Natural Science Foundation of China （51374246，51304240）
Project(2013FJ6002) supported by the Science and Technology Plan of Hunan Province （2013FJ6002）
Project(2015zzts260) supported by the Master Independent Explored Innovation of Central South University) （2015zzts260）
