(東北大學巖石破碎實驗室， 413信箱， 沈陽110006)
摘 要: 采用ASM68K半自動圖象分析系統(tǒng)觀測花崗巖料層動態(tài)粉碎產(chǎn)品的細觀損傷特性，分別從唯象和分形的角度研究了料層材料動態(tài)損傷的演化規(guī)律。研究結(jié)果表明：料層粉碎產(chǎn)品的損傷程度隨沖擊速度的提高而增加，動態(tài)損傷分布具有分形特征，分維數(shù)是反映料層動態(tài)損傷程度的一個特征量，用分維數(shù)定義的損傷變量與料層應變率呈近似的線性關(guān)系。
關(guān)鍵字: 巖石料層； 動態(tài)細觀損傷； 分形； 分維數(shù)
（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
