摘要
在保持侧向压力基本稳定的条件下,对岩石试件进行了竖向反复加卸载直至破坏的双向压缩实验,得到了不同侧压及不同竖向压力下卸载的等效卸载弹性模量;对岩石试件还进行了双向同步加卸载直至破坏实验,得到了不同加载速度及不同双向压力下卸载的等效卸载弹性模量;两种实验都得到了破坏时的总吸收能、总耗散能和总可释放应变能。同时完成了方板中心圆孔岩石试件在不同加载速度下的双向压缩红外热成像实验。实验结果表明,加载速度越高,则试件表面平均温度越低;反之,亦然。
The cyclic vertical loading-unloading biaxial compression tests of marble under several fixed transverse pressures were carried out.Another synchronous biaxial compression test of marble was also carried out.Unloading elastic modulus in these two situations were obtained.Correspondingly the total absorbed energy,releasable strain energy and dissipative energy in above two failure progress were also obtained.The thermal infrared biaxial compression experiment of holed foursquare specimen under different loading rate was done.The experimental result shows that the higher the loading rate is,the lower the average temperature of specimens surface is,vice versa.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2010年第12期2033-2038,共6页
Journal of China Coal Society
基金
国家重点基础研究发展规划(973)项目(2010CB226802
2011CB201201)
国家自然科学基金资助项目(41072242)
关键词
双向压缩
卸载弹性模量
加载速度
总破坏吸收能
耗散能
可释放应变能
biaxial compression
unloading elastic modulus
loading velocity
total damage absorptive energy
dissipative energy
releasable strain energy
