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层裂的分形机理及分维和连接阈值的关系

FRACTAL MECHANISM OF SPALLAIION AND RELAIION BETWEEN FRACTALDIMENSION AND COALESCENCE THRESHOLD

  • 摘要: 通过对微裂纹连接的动力学分析,提出了描述层裂损伤演化的统计分形模型。指出分形层裂面的形成机理与层裂中微裂纹级串连接的动力学过程密切相关,由此,得到了一种单峰的分维一连接阈值关系,定性解释了分维随韧性单峰变化的实验现象。

     

    Abstract: In the light of the dynamical analysis of microcrack coalescence, this paperpresents a statistical fractal modeI to describe the damage evolution of spailation. Themodel demonstrates that the mechanisnl of fractal surfaces formed in spallatioii is cioselyrelated to the dynainic processes of the cascade coalescence of lnicrocracks.A unimodalrelation between the fractal dimension and the coalescence threshold based on the modelcan qualitatively explain the challenging observation of fractal dimension versus t...

     

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