A Numerical Research on Crack Process of Gypsum Containing Single Flaw with Different Angle and Length in Uniaxial Loading
A Numerical Research on Crack Process of Gypsum Containing Single Flaw with Different Angle and Length in Uniaxial Loading
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DOI：
10.1155/2018/2968205
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发表时间：
2018
影响因子：
1.6
通讯作者：
D. Bing;Guicheng He;Zhijun Zhang
中科院分区：
文献类型：
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作者：
D. Bing;Guicheng He;Zhijun Zhang
为了研究岩石或类岩石材料在单轴加载下的裂纹行为，对含有单个裂纹的石膏试样进行了一系列数值模拟，这些裂纹具有不同的倾角（0°-90°）和长度（10 mm - 30 mm）。基于数值模拟结果，研究了不同倾角下裂纹长度对峰值强度、CI应力和CD应力的影响。结果表明：随着裂纹角的增大，峰值强度先减小后增大；同时，随着缺陷长度的增加，峰值强度逐渐降低。当倾角为30°、45°和60°时，随着缺陷长度的增加，峰值强度降低程度增大。CI应力和CD应力不仅与裂纹倾角有关，还与裂纹长度有关。在数值模拟中观察到四种类型的裂纹。本研究有助于加深对不同条件下岩石裂纹行为的认识。
To investigate the crack behaviour of rock or rock-like material in uniaxial loading, a series of numerical simulations were conducted on gypsum specimens containing a single flaw with different inclination angle (0°–90°) and length (10 mm–30 mm). Based on the numerical simulations results, the effect of flaw length on peak strength, the CI stress, and the CD stress were investigated with different inclination angles. The results show that the peak strength decreased initially and then increased with increasing of the flaw angle. Meanwhile, the peak strength decreased gradually when the length of the preexisting flaw increased. When the inclination angle was 30°, 45°, and 60°, the reduction degree of peak strength increased with increasing of the flaw length. The CI stress and CD stress not only depend on the inclination angle but also depend on flaw length. Four types of crack were observed in numerical simulations. The present research facilitates increased understanding of crack behaviour of rock under different conditions.