岩石加卸荷破坏细观机理CT实时分析
CT REAL TIME TESTING OF MESO-FAILURE MECHANISMS OF ROCK UNDER LOADING AND UNLOADING CONDITIONS
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摘要: 利用与CT(computerizedtomography)机配套的专用岩石三轴加载试验设备 ,采用CT实时试验的手段对连续加载试验条件下和卸围压应力作用下砂岩破坏细观机理进行了对比研究。结果表明 ,岩石的卸荷损伤演化破坏具有突发性 ,卸围压破坏导致的扩容比连续加载破坏时大.Abstract: A comparative study of meso-failure mechanisms of sandstone under successive loading and unloading conditions is made by using a special triaxial loading equipment corollay to a CT equipment. The CT images obtained show that the unloading failure is explosive, resulting in a dilatancy more than that of succesive loading failure.