| 自由面对应力波反射诱发层裂过程影响的数值模拟 |
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| 引用本文： | 左宇军,唐春安,宫凤强.自由面对应力波反射诱发层裂过程影响的数值模拟[J].吉首大学学报(自然科学版),2006,27(6):80-83. |
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| 作者姓名： | 左宇军 唐春安 宫凤强 |
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| 作者单位： | (1.大连大学材料破坏力学数值试验研究中心,辽宁 大连 116622;2.东北大学岩石破裂与失稳研究中心,辽宁 沈阳 110004;3.中南大学资源与安全工程学院,湖南 长沙 410083) |
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| 基金项目： | 国家自然科学基金;中国博士后科学基金 |
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| 摘 要： | 采用基于细观损伤力学基础上开发的动态版岩石破坏过程分析系统RFPA2D数值模拟软件，对冲击载荷作用下非均匀介质中应力波反射诱发层裂过程进行了数值模拟，重点探讨了不同自由面情况对层裂过程的影响.结果表明：动态版RFPA2D数值模拟软件可以逼真地模拟其过程；在不同自由面情况下，应力波传播至自由面产生反射诱发层裂破坏，除与应力波的峰值、延续时间和波形等有关外，还与应力波传播的方向有关，如果相同应力波垂直入射至自由面比斜入射至自由面更容易诱发层裂破坏的发生；当应力波平行入射至自由面时不会诱发层裂破坏.
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| 关 键 词： | 数值模拟 冲击应力波 层裂 非均匀介质 自由面 |
| 文章编号： | 1007-2985（2006）06-0080-04 |
| 收稿时间： | 2006-09-21 |
| 修稿时间： | 2006年9月21日 |
Numerical Simulation on Spallation Process Induced by Reflection of Stress Wave Under Different Free Faces |
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| ZUO Yu-jun,TANG Chun-an,GONG Feng-qiang.Numerical Simulation on Spallation Process Induced by Reflection of Stress Wave Under Different Free Faces[J].Journal of Jishou University(Natural Science Edition),2006,27(6):80-83. |
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| Authors: | ZUO Yu-jun TANG Chun-an GONG Feng-qiang |
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| Institution: | （1.Research Center for Numerical Tests on Material Failure,Dalian University,Dalian 116622,Liaoning China;2.Center for Rock Instability and Seismicity Research，Northeastern University,Shenyang 110004,China;3.College of Resources & Safety Engineering,Central South University,Changsha 410083,China） |
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| Abstract: | Based on mesoscopic damage mechanics,numerical code RFPA~(2D)(dynamic version) is developed to simulate the spallation failure process of inhomogeneous medium induced by reflection of stress wave,then the behaviour and mechanism of spallation process under different free faces are numerically analyzed and compared.The results show that the spallation failure process of inhomogeneous medium induced by reflection of stress wave can be simulated realistically with the code of RFPA~(2D).It is indicated that the spallation failure process of inhomogeneous medium induced by reflection of stress wave is concerned with not only peak value of stress wave,duration of stress wave and waveform,but also the propagation direction of stress wave.The spallation failure process occurrence under incident stress wave perpendicular to free faces is easier than that under incident stress wave inclined to free faces.The spallation failure process does not occur under incident stress wave parallel to free faces. |
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| Keywords: | numerical simulation impact stress wave spallation heterogeneous medium free face |
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