基于数值实验的岩石试样最佳长径比研究

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摘要通过颗粒流虚拟实现岩石单轴和三轴压缩试验，对不同设计长径比0.5，1.0，1.5，2.0，2.5，3.0，4.0的岩石试样进行不同围压下的数值压缩试验，分析长径比和围压对岩石试样破坏过程、破坏形态、应力–应变曲线和破坏过程中能量转移的影响。分析结果表明：利用力学指标研究岩石最佳长径比的试验数据离散性较大；利用能量研究最佳长径比，则试验数据离散性小。相对于力学指标研究方法，能量法的试验结果规律稳定。基于此研究认为，岩石试样的最佳长径比为3.0。

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关键词 ：岩石力学, 数值实验, 长径比, 围压, 破坏形态, 颗粒流

Abstract：The uniaxial and triaxial compression tests of rock are virtually realized by particle flow method. Numerical compression tests of rock specimens with seven kinds of length-diameter ratios，i. e. 0.5，1.0，1.5，2.0，2.5，3.0，4.0，under four different confining pressures are conducted to analyze the influence of the ratio and confining pressure on the failure process，failure shape，stress-strain curve and energy transfer. The study results show that the test data scatterness of optimal length-diameter ratio of rock specimen by mechanics index are larger than those calculated by energy analysis method；and the test result rule by energy analysis method is good and stable. Besides，the optimal length-diameter ratio of 3.0 is strongly recommended.

Key words： rock mechanics numerical tests length-diameter ratio confining pressure failure shape particle flow

收稿日期: 2009-12-03

引用本文:

尹小涛，葛修润，李春光，王水林 . 基于数值实验的岩石试样最佳长径比研究[J]. 岩石力学与工程学报, 2010, 29(S2): 3608-3608.
YIN Xiaotao，GE Xiurun，LI Chunguang，WANG Shuilin. STUDY OF OPTIMAL LENGTH-DIAMETER RATIO OF ROCK SPECIMEN BASED ON NUMERICAL TESTS. , 2010, 29(S2): 3608-3608.

链接本文:

http://www.rockmech.org/CN/Y2010/V29/IS2/3608

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