Simulation of Rock Mechanical Behavior Under Cyclic Loading Using Clump Parallel-Bond Models

作     者：Xia, Ming 

作者机构：Xiangtan Univ Hunan Key Lab Geomech & Engn Safety Xiangtan 411105 Peoples R China Xiangtan Univ Coll Civil Engn & Mech Xiangtan 411105 Peoples R China 

出 版 物：《GEOTECHNICAL AND GEOLOGICAL ENGINEERING》 (地质技术与地质工程)

年 卷 期：2019年第37卷第4期

页      面：2325-2333页

核心收录：

学科分类：0819[工学-矿业工程] 08[工学] 0818[工学-地质资源与地质工程] 

基　　金：National Natural Science Foundation of China [11702235, 51641905] Natural Science Foundation of Hunan Province [2017JJ3290] Scientific Research Foundation of Education Department of Hunan Province [17C1540] Open Research Fund of Hunan Key Laboratory of Geomechanics and Engineering Safety [16GES07] 

主　　题：Particle simulation method Clump parallel-bond model Cyclic loading and unloading Loading procedure Rock mechanical behavior 

摘      要：In order to investigate rock mechanical behavior under cyclic loading and unloading conditions, the clump parallel-bond model (CPBM) combined with the newly-proposed loading procedure was used in numerical simulations and the simulated results were compared with those of the experiment. Then the intact rock under different confining pressures and pre-cracked rock with different flaw inclination angles are also investigated in detail. The related numerical results have demonstrated that: (1) the CPBM, combined with the use of the newly-proposed loading procedure, can be used to modelling the intact rock and pre-cracked rock mechanical behavior under cycle loading and unloading conditions. The simulated results are in good agreement with the experimental results;(2) the number of microscopic cracks increases with the cycle increases during the loading process, while few microscopic cracks are generated during the unloading process. The higher the confining pressure, the less damage the rock has accumulated during the cyclic loading process;(3) the inclination of the pre-existing flaw has a significant effect on the macroscopic fracture pattern.