摘要
根据压缩载荷作用下的滑移型裂纹模型,结合裂纹的动态断裂准则,模拟了花岗岩在应变速率从10-4～100s-1以及围压为20,50,80MPa时的强度特性。结果表明,模拟结果与实验结果基本一致。还探讨性地从裂纹扩展和聚合特性入手揭示岩石材料强度随应变速率以及围压变化的机理。
According to the sliding crack model and dynamic crack growth criterion,the strength of a granite under dynamic compression at strain rates from10 -4 to10 0 s -1 and confining pressures of 20,50,80MPa were simulated.It is shown that the simulated results agree with the experimental results.The mechanism of the rock strength changing with strain rate and confining pressure were also tentatively discussed according to the study on the growth and nucleation of sliding cracks.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2002年第3期329-333,共5页
Rock and Soil Mechanics
基金
国家自然科学基金资助项目(50009008)
中国科学院留学择优支持研究项目。
关键词
裂纹模型
花岗岩
动三轴抗压强度
crack model
granite
dynamic triaxial compressive strength
