摘要
采用自主开发的图像分析软件结合数字图像相关技术对含预制单裂纹的类岩石材料在单轴压缩下的变形破坏特性进行试验研究。基于试件全局应变场角度,从细观层次量化分析、总结裂纹起裂、扩展的规律及岩石变形损伤演化特征。并采用断裂分析软件FRANC2D/L对相似模型进行数值模拟,分析在加载全程不同阶段的裂纹扩展路径及其应力场分布特征。结合试验与数值研究结果,细致地探讨裂隙岩石的细观力学机制与宏观力学响应之间的内在联系,该研究有助于提升人们对节理岩体工程灾变机制的认识。
A digital image analysis software was written to implement the digital image correlation method for the capturing of the deformation and failure characteristics of rock-like materials with a pre-existing single fissure under uniaxial compression. The crack initiation and propagation and the rock damage were analyzed quantitatively based on the global strain field on the surface of specimen at meso-level. Besides,FRANC2D/L,a fracture analysis software,was applied to a numerical model corresponding to the experimental specimen to simulate the path of crack growth and the distribution of stress field at different stages in the whole process of loading. The intrinsic link between the microscopic mechanical mechanism and the macroscopic mechanical response of rock with a single fissure was discussed based on the results of experiment and simulation.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2015年第4期763-769,共7页
Chinese Journal of Rock Mechanics and Engineering
基金
国家自然科学基金资助项目(41202193)
教育部博士点基金项目(20110072120011)
关键词
岩石力学
类岩石材料
裂纹扩展
全局应变场
损伤演化
数字图像
数值模拟
rock mechanics
rock-like material
crack propagation
global strain field
damage evolution
digital image
numerical simulation
