摘要
利用 RFPA2 D软件研究了试样孔洞周边裂纹的形成和演化 ,验证了三种类型裂纹的存在。研究了不同围压条件下不同裂纹间的相互作用机制。验证了局部应力集中是裂纹形成和扩展的重要因素 ,同时也指出 ,岩石类材料非均匀性是形成拉。
A newly developed numerical approach RFPA 2D Code is presented to simulate the evolution of crack around borehole in brittle rock. The three types of cracks observed in experiments are examined in numerical study. In addition, the mechanisms of fracture interaction in rock specimen subjected to confining pressures are investigated. The results from the above studies are that the local stress concentration is an important factor to affect the growth of fractures. Also, it is point out that the heterogeneity of rock materials is the significant reason for formation of the zone of tensile, compressive stress concentration, unregular path and randomicity of propagation of cracks.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2000年第5期577-583,共7页
Chinese Journal of Rock Mechanics and Engineering
基金
本研究为国家杰出青年基金 !( 5 95 2 5 40 8)
辽宁省自然科学基金
中国科学院力学研究所非线性连续介质力学开放研究实验室 ( LNM)
关键词
数值模拟
裂纹演化
非均匀性
声发射
岩石
numerical simulation, evolution of crack, heterogeneous acoustic emission
