摘要
本文利用岩石破裂过程分析系统(RFPA)研究了含有不同角度预制裂纹的岩石试样在动态载荷作用下的破坏过程。数值模拟表明:应力峰值较小时,试样的破裂模式与静态载荷作用下的破裂模式相似;应力峰值较大时,试样的破坏区主要集中在试样顶端。在相同的应力峰值条件下,试样的最终破坏模式基本不受预制裂纹的倾角的影响。数值模拟得到的破裂模式与实验结果比较吻合。
Rock Failure Process Analysis （RFPA） code is used to study the failure process of rock disks with pre - existing cracks under dynamic loading. The failure pattern of rock specimen subjected to dynamic loading is similar to that under static loading when the amplitude of stress wave is relatively low. With the increasing magnitude of stress wave the failure zone occurs on the top of the rock disks. The numerical results indicate that the angles of the pre- existing crack don＇t affect the failure e characteristics of reck disks. The numerical results also compare well with those of the experiments.
出处
《地下空间与工程学报》
CSCD
2005年第6期856-858,共3页
Chinese Journal of Underground Space and Engineering
关键词
动载荷
预制裂纹
破坏过程
数值模拟
Dynamic loading
pre - existing crack
failure process
numerical simulation
