| 岩石类脆性材料的离散元建模方法研究 |
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| 引用本文： | 叶勇,徐西鹏. 岩石类脆性材料的离散元建模方法研究[J]. 郑州轻工业学院学报(自然科学版), 2008, 23(5) |
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| 作者姓名： | 叶勇 徐西鹏 |
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| 作者单位： | 华侨大学,石材加工研究重点实验室,福建,泉州,362021 |
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| 摘 要： | 通过单轴压缩、拉伸及双轴压缩模拟试验,分析了岩石脆性材料离散单元法建模过程中各个参数的关系.模拟试验表明:通过建立杨氏模量E及泊松比v与颗粒接触刚度的关系可以反向确定接触刚度值;法向接触刚度与法向连接强度的比值对岩石离散单元模型分析的影响很小;法向与切向连接强度的比值影响裂纹的破坏方式;围压的大小控制双轴试验时裂纹的类型.基于此,建立了此类了材料基于现象的宏观参数与其微观参数之间的联系规律.
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| 关 键 词： | 离散单元法(DEM) 颗粒流 双轴压缩实验 建模方法 |
Study on distinct element modeling method of rock-like brittleness material |
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| YE Yong,XU Xi-peng. Study on distinct element modeling method of rock-like brittleness material[J]. Journal of Zhengzhou Institute of Light Industry(Natural Science), 2008, 23(5) |
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| Authors: | YE Yong XU Xi-peng |
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| Abstract: | The relation of each parameter in the modeling process of rock-lick brittleness material by dis- tinct element method is analyzed through compress test,tension test and biaxial compression test.Simula- tion experiment shows that:by ertablishing the relationship among young modulus E,poisson ratiov and particle contact stiffness can contact stiffness value determined;the ratio of normal contact stiffness and nor- mal connecting intensity has little influence on rock distinct element model analysis;the ratio of normal and tangential connecting intensity influences crack damage mode;confining pressure controls crack size in double-shaft experiment.Finally,the relation rules of macroscopical parameters based on phenomena and microcosmic parameters of this material are established. |
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| Keywords: | distinct element method (DEM) granular flow biaxial compression test modeling method |
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