摘要
对软岩(砂浆模拟材料)进行了应变速率范围为10^-5～10^1s^-1的动单轴压缩实验。实验结果表明，试样的抗压强度随应变速率的增加有较明显的增加趋势，增加幅度大于硬岩；试样的弹性模量以及泊松比随着应变速率的增加均有增加的趋势，但幅度小于强度的增加幅度。并根据不同应变速率下试样破裂面的SEM实验结果，初步地分析了软岩动态力学特性机理。
The experimental study on soft rock (analogized with mortar) under dynamic uniaxial compression at the strain rates from 10-5 to 101 s-1 has been carried out. It is indicated that the compressive strength of the soft rock increases with the increasing strain rate; and the rising rates are higher than that of hard rock. The Youngs modulus and Poissons ratio of the soft rock increase with the increasing strain rate, but the rising rates are less than that of compressive strength. In addition, based on the SEM results, the mechanism of the strain rate effect of the soft rock is primarily analyzed.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2004年第1期1-4,共4页
Rock and Soil Mechanics
基金
国家自然科学基金(50009008)
国家重点基础发展规划项目(2002CB412705)资助项目。
关键词
动单轴压缩
软岩
力学特性
应变速率
dynamic uniaxial compression
soft rock
mechanical properties
