摘要
利用MTS-815 Flex Test GT岩石力学实验系统对花岗岩进行三轴压缩试验,分析其能量特征与应力、应变和围压之间的关系。试验结果表明,岩样耗散能量要远远大于释放能量,两者的差值就是岩样在整个试验过程中实际吸收的能量;岩样耗散能和释放能随着应力的增大而增大,但能量耗散速率随着围压的增大而减小,能量释放速率随着围压的增大而增大;花岗岩单位体积实际吸收能随着围压的增大而显著增加,二者呈正线性关系;能量吸收率随着围压的增大逐渐减少,二者呈负线性关系;随着围压的增大,能量-应变曲线的斜率增大,能量的增长速率也越大。
To study the relationship between energy properties and factors including stress,strain and confining pressure,the triaxial compression tests of granite samples were carried out on the MTS-815 Flex Test GTrock mechanics test system. The results showthat dissipation energy of the samples is far greater than the released energy,and the difference between them is the actual energy absorption in the rock samples during the entire testing process. Both the dissipation and released energy increase with the stress,and the dissipation energy rate decreases with the confining pressure,whereas the released energy rate increases with the confining pressure. The actual energy absorption per unit volume of granite increases significantly with the confining pressure,almost positively linearly. The energy absorption rate reduces gradually with the confining pressure,almost negatively linearly. Both the slope of the energy-strain curve and the energy growth rate increase with the confining pressure.
出处
《应用数学和力学》
CSCD
北大核心
2015年第S1期147-154,共8页
Applied Mathematics and Mechanics
基金
国家自然科学基金(51308480)~~
关键词
岩石力学
花岗岩
三轴压缩
围压
能量耗散
rock mechanics
granite
triaxial compression
confining pressure
energy dissipation
