Simulation of rock deformation and mechanical characteristics using clump parallel-bond models
Simulation of rock deformation and mechanical characteristics using clump parallel-bond models
复制标题
使用块体平行键模型模拟岩石变形和力学特性
DOI：
10.1007/s11771-014-2254-3
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发表时间：
2014-07
影响因子：
4.4
通讯作者：
Zhao, Chongbin
中科院分区：
文献类型：
--
作者：
Xia, Ming;Zhao, Chongbin
为了正确模拟具有高单轴抗压强度与抗拉强度（UCS/TS）比和真实强度-破坏包络线的硬岩，采用块体平行键模型（CPBM）颗粒模拟方法进行了一系列试件尺度的数值试验，详细讨论了岩石的变形和力学特性。同时，研究了加载程序和裂纹密度对通过 CPBM 颗粒模拟方法建模的试样力学行为的影响。相关数值结果表明：1）CPBM颗粒模拟方法采用常规加载程序时，单轴抗压强度（UCS）、抗拉强度（TS）和弹性模量被高估； 2）CPBM粒子模拟方法中随着裂纹密度的增加，弹性模量、强度和UCS/TS降低，而泊松比增大； 3）采用CPBM颗粒模拟方法可以重现高UCS/TS（>10）值，以及高摩擦角和合理的内聚强度； 4）CPBM粒子模拟方法中，随着围压的增加，模拟试件的峰值强度和微观裂纹数量均增加，但拉伸裂纹数与剪切裂纹数的比值减小； 5）与传统的平行粘结模型相比，CPBM可以重现更准确的结果来模拟岩石变形和力学特性。
To properly simulate hard rock with a high ratio of the uniaxial compressive strength to tensile strength (UCS/TS) and realistic strength-failure envelope, the rock deformation and mechanical characteristics were discussed in detail when the particle simulation method with the clump parallel-bond model (CPBM) was used to conduct a series of numerical experiments at the specimen scale. Meanwhile, the effects of the loading procedure and crack density on the mechanical behavior of a specimen, which was modeled by the particle simulation method with the CPBM, were investigated. The related numerical results have demonstrated that: 1) The uniaxial compressive strength (UCS), tensile strength (TS) and elastic modulus are overestimated when the conventional loading procedure is used in the particle simulation method with the CPBM; 2) The elastic modulus, strength and UCS/TS decrease, while Poisson ratio increases with the increase of the crack density in the particle simulation method with the CPBM; 3) The particle simulation method with the CPBM can be used to reproduce a high value of UCS/TS(>10), as well as a high friction angle and reasonable cohesion strength; 4) As the confining pressure increases, both the peak strength of the simulated specimen and the number of microscopic cracks increase, but the ratio of tensile cracks number to shear cracks number decreases in the particle simulation method with the CPBM; 5) Compared with the conventional parallel-bond model, the CPBM can be used to reproduce more accurate results for simulating the rock deformation and mechanical characteristics.
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影响因子：
1.6
作者：
Chong-bin Zhao;T. Nishiyama;A. Murakami
通讯作者：
Chong-bin Zhao;T. Nishiyama;A. Murakami
影响因子：
2.9
作者：
Chong-bin Zhao;B. Hobbs;A. Ord;P. Hornby;S. Peng;Liang-ming Liu
通讯作者：
Chong-bin Zhao;B. Hobbs;A. Ord;P. Hornby;S. Peng;Liang-ming Liu
影响因子：
6.9
作者：
Hadjigeorgiou, John;Esmaieli, Kamran;Grenon, Martin
通讯作者：
Grenon, Martin
DOI：
10.1007/s12613-010-0350-4
发表时间：
2010-10-01
影响因子：
4.8
作者：
Xia, Ming;Zhou, Ke-ping
通讯作者：
Zhou, Ke-ping
考虑温度相关弹性模量和强度的热致岩石损伤的粒子模拟
影响因子：
5.3
作者：
Xia, Ming;Zhao, Chongbin;Hobbs, B. E.
通讯作者：
Hobbs, B. E.