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中文摘要：
针对微波诱发岩石损伤己取得不少研究成果，但现有的成果大多是基于连续介质理论。本文采用基于离散单元法的PFC2D数值软件，对由石英和斜长石两相物质组成的材料在不同间断比尺和照射时间下的微波诱发损伤进行了数值模拟研究。研究结果表明：采用离散单元法能很好地模拟微波诱发材料损伤的微裂纹的萌生、发展、贯通过程；微裂纹起源于高吸收相石英晶体的外边界且围绕着石英晶体向四周不断扩展、延伸进入斜长石晶体，最终呈现放射状的网络张拉裂纹。微波损伤数值模拟结果中的裂纹符合试验作用下的裂纹分布形态，研究结果对于采用离散单元法进行微波诱发损伤数值模拟提供了一种新方法。
英文摘要：
In simulation of microwave-induced rock damage, various achievements have been made in recent years, but most of them are based on the theory of continuous medium. This study has examined two-phase materials composed of quartz and plagioclase components under different discontinuity scales and different levels of exposure to microwave radiation, using the discrete element method of a particle flow code PFC2D. The results indicated that this method was successful in simulation of rock cracking process： initiation, development and coalescence of the cracks. And the micro-cracks were initiated at the boundary of high absorption phase, i.e. quartz crystals, expanding outward around and extending into the plagioclase material. Finally, a network of radial tensile cracks was mobilized. The simulated patterns of cracks agree well with those observed in experimental tests of microwave radiation. The results of the present study provide a new approach of numerical simulation to microwave-induced damage using the discrete element method.
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