岩石细观损伤过程的CT动态观测

CT Dynamic Detection of Meso-Damage Process of Rocks

采用宏观轴向应力与密度损伤增量结合分析岩石细观损伤演化过程。根据 CT图像可以求得岩石损伤过程中任意应力阶段任意区域岩石密度损伤增量 ,首次将任意区域岩石压密和扩容定量化。岩石密度损伤增量不仅可以反映岩石损伤程度 ,而且可以描述岩石损伤演化过程。进一步讨论表明 ,岩石密度损伤增量场能圆满地刻画岩石细观损伤状态和岩石细观损伤过程。

This paper analyzes the meso damage process of rock using the combination of the macroscopic axial stress with the density damage increment.A density damage increment can be obtained at arbitrary stress stage and at arbitrary region of rock from CT images.The compaction and dilatancy at arbitrary region of rock can be firstly quantified. It is tested that the density damage increment not only reflects the damage degree of rock but also describes the meso-damage process of rock. The further discussion shows that the density damage increment field can perfectly describes the damage state and the meso damage process of rocks.