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基于颗粒流数值试验的岩石单剪、直剪试验对比研究
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摘要
为对比分析岩石单剪、直剪试验力学参数差异,本文采用颗粒流PFC软件进行岩石单剪、直剪数值试验对比研究。在室内物理力学试验基础上,分别构建岩样单剪、直剪数值试验模型进行数值试验,并从应力应变曲线、裂纹发育特征等方面分析单剪、直剪试验差异。试验结果表明单剪、直剪试验粘聚力之比为1.0:1.66,内摩擦角度之比为1.0:1.08,力学参数差异主要表现在粘聚力上,且试验参数的差异主要由于两者能量转换特征差异造成。
The article conducted contrast research of rock's simple shear and direct shear numerical experiments using PFC software on Particle flows, for analyzing the mechanical parameters differences between the two experiments. On the basis of physical and mechanical test, numerical tests were carried out by building sample simple shear numerical test and direct shear models, and the differences between simple shear test and direct shear test were analyzed from the aspects of stress strain curve and crack development characteristics. The experimental results showed that the ratio of the cohesive force of simple shear test and direct shear test was1.0:1.66, and the ratio of the internal friction angle was 1.0:1.0. Mechanical parameters differences mainly displayed on the cohesive force and test parameters of the differences were mainly caused by energy conversion characteristic differences between the two parameters.
引文
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