Modified discontinuous deformation analysis for rock failure: Crack propagation

被引：7
|
作者：
Chen, Yunjuan [1 ]
Zhang, Xin [1 ]
Zhu, Weishen [2 ]
Wang, Wen [3 ]
机构：
[1] Shandong Jianzhu Univ, Sch Civil Engn, Jinan 250101, Shandong, Peoples R China
[2] Shandong Univ, Geotech & Struct Engn Res Ctr, Jinan 250061, Shandong, Peoples R China
[3] Shandong Urban Construct Vocat Coll, Jinan 250103, Shandong, Peoples R China
来源：
GEOMECHANICS AND ENGINEERING | 2018年 / 14卷 / 04期
基金：
中国博士后科学基金; 中国国家自然科学基金;
关键词：
crack propagation; discontinuous deformation analysis method for rock failure (DDARF); coupled modeling methods; convergence criterion; UNIAXIAL COMPRESSION; PARTICLE HYDRODYNAMICS; NUMERICAL-ANALYSIS; COALESCENCE; BEHAVIOR; SIMULATION; MECHANISM; SPECIMENS; SPH;
D O I：
10.12989/gae.2018.14.4.325
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
Deformation of rock masses is not only related to rock itself, but also related to discontinuities, the latter maybe greater. Study on crack propagation at discontinuities is important to reveal the damage law of rock masses. DDARF is a discontinuous deformation analysis method for rock failure and some modified algorithms are proposed in this study. Firstly, coupled modeling methods of AutoCAD-DDARF and ANSYS-DDARF are introduced, which could improve the modeling efficiency of DDARF compared to its original program. Secondly, a convergence criterion for automatically judging the computation equilibrium is established, it could overcome subjective drawbacks of ending one calculation by time steps. Lastly but not the least, relationship between the super relaxation factor and the calculation convergence is analyzed, and reasonable value range of the super relaxation factor is obtained. Based on these above modified programs, influences on crack propagation of joint angle, joint parameters and geo-stresses' side pressure are studied.
引用
收藏
页码：325 / 336
页数：12
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