Numerical simulation of the dynamic impact breakage testing of rock
Numerical simulation of the dynamic impact breakage testing of rock
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DOI：
10.1016/j.ijrmms.2004.06.004
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发表时间：
2005-02
影响因子：
7.2
通讯作者：
D. Reddish;L. Stace;P. Vanichkobchinda;D. Whittles
中科院分区：
文献类型：
--
作者：
D. Reddish;L. Stace;P. Vanichkobchinda;D. Whittles
采用室内落锤试验和数值模拟方法研究了冲击能量对花岗岩圆柱试样破碎程度的影响。落锤试验结果表明，花岗岩的破碎度与冲击功成非线性关系。在落锤试验的建模中，假定花岗岩中产生的剪切局部化代表离散的断裂面。对模型输出进行图像分析以确定粒度分布。相应的级配曲线从数值模拟，然后验证对实验室导出的曲线，表明数值模拟的潜力，以模拟脆性岩石的破碎过程。
Laboratory drop weight tests and numerical modelling have been used to study the effect of impact energy on the degree of fragmentation of cylindrical granite specimens. The drop weight tests indicated that the degree of fragmentation of the granite formed a non-linear relation with impact energy. In the modelling of the drop weight test, the shear localisation developed in the granite was assumed to represents discrete fracture planes. Image analysis of the model outputs was undertaken to determine particle size distributions. Corresponding grading curves from the numerical modelling were then validated against the laboratory derived curves indicating the potential of numerical modelling to simulate the fragmentation process of brittle rocks.