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| 非均匀介质中应力波反射诱发层裂过程的数值模拟 | |
| 引用本文： | 左宇军,朱万成,唐春安,李夕兵,王卫华.非均匀介质中应力波反射诱发层裂过程的数值模拟[J].中南大学学报(自然科学版),2006,37(6):1177-1182. |
| 作者姓名： | 左宇军 朱万成 唐春安 李夕兵 王卫华 |
| 作者单位： | 1. 东北大学,岩石破裂与失稳研究中心,辽宁,沈阳,110004;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 |
| 基金项目： | 国家自然科学基金;中国博士后科学基金 |
| 摘 要： | 采用基于细观损伤力学基础上开发的动态版RFPA2。数值模拟软件，对不同冲击栽荷作用下非均匀介质中应力波反射谤发层裂过程进行数值模拟。通过对不同应力波延续时间、不同应力波峰值和不同应力波波形下应力波诱发层裂过程的数值分析，对应力波反射诱发层裂的规律和机制进行探讨。研究结果表明：应力波延续时间和应力幅值对岩石的层裂过程影响较大，不同形状的应力波实际上是在相同时段内应力波具有不同的应力幅值和不同的应力加栽速率，不同形状的应力波对介质的作用结果是这些因素同时作用的综合反映;应力波反射谤发层裂过程的发生，是各个时刻不同加载条件下微破裂累积的宏观体现。 |
| 关 键 词： | 数值模拟 冲击应力波 层裂过程 |
| 文章编号： | 1672-7207(2006)06-1177-06 |
| 收稿时间： | 2006-06-10 |
| 修稿时间： | 2006年6月10日 |
Numerical simulation on spallation process of inhomogeneous medium induced by reflection of stress wave |
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| ZUO Yu-jun,ZHU Wan-cheng,TANG Chun-an,LI Xi-bing,WANG Wei-huai.Numerical simulation on spallation process of inhomogeneous medium induced by reflection of stress wave[J].Journal of Central South University:Science and Technology,2006,37(6):1177-1182. | |
| Authors: | ZUO Yu-jun ZHU Wan-cheng TANG Chun-an LI Xi-bing WANG Wei-huai |
| Institution: | 1. Research Center for Rock Instability and Seismicity, Northeastern University, Shenyang 110004, China; 2. Research Center for Numerical Tests on Material Failure, Dalian University, Dalian 116622, China; 3. School of Resources and Safety Engineering, Central South University, Changsha 410083, China |
| Abstract: | Based on the mesoscopic damage mechanics,numerical code RFPA~(2D) was developed to simulate the spallation process of inhomogeneous medium induced by reflection of stress wave under different stress waves(such as different durations,amplitudes and shapes),and the behaviour and mechanism of spallation process were numerically analyzed and discussed.The results show that the influences of duration and amplitude of stress wave on spallation process of rock under stress wave loading are important;and stress wave with different waveforms is characteristic of different stress values and different stress loading ratios during the same period of time,which brings about the comprehensive effect when difform stress wave is loaded to medium.It is the macro effect of accumulative micro fracture in all period of time that spallation failure is induced by reflection of stress wave emerges. |
| Keywords: | numerical simulation impact stress wave spallation process |
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