(东北大学岩石破碎实验室， 413信箱， 沈阳110006)
摘 要: 采用ASM68K半自动图象分析系统观测花岗岩料层动态粉碎产品的细观损伤特性，分别从唯象和分形的角度研究了料层材料动态损伤的演化规律。研究结果表明：料层粉碎产品的损伤程度随冲击速度的提高而增加，动态损伤分布具有分形特征，分维数是反映料层动态损伤程度的一个特征量，用分维数定义的损伤变量与料层应变率呈近似的线性关系。
关键字: 岩石料层； 动态细观损伤； 分形； 分维数
（Box 413, Laboratory of Rock Fragmentation, Northeastern University, Shenyang 110006, P. R. China）
Abstract:The meso-scopic damage of impacted granite layers was observed by ASM68K semi-automatic image analysis system. The distribution and evolving process of dynamic damage of layers were studied respectively from imaginary and fractal view. The test results indicated that the damage degree increases with raising impact velocity, the damage distribution of layers is fractal, the fractal dimension is a proper value reflecting dynamic damage degree of layers, the damage variation defined by fractal dimension is approximately linear with the strain rate of layers.
Key words: rock layers; dynamic meso-scopic damage ; fractal; fractal dimension
