东篱科研大数据发现系统（DRDS）

位置：成果数据库 > 期刊 > 期刊详情页

含孔洞岩石试样三维破裂过程的并行计算分析

期刊名称：岩土工程学报
时间：0
页码：1447-1455
语言：中文
分类：TU45[建筑科学—岩土工程;建筑科学—土工工程]
作者机构：[1]东北大学岩石破裂与失稳研究中心,辽宁沈阳110819
相关基金：国家自然科学基金项目（50874024 50934006）; 国家重点基础研究发展计划（973计划）项目（2007CB209405）; 中央高校基本科研业务费项目（N090501001）; 霍英东教育基金项目（122023）; 中韩NSFC-KOSEF国际合作项目（50911140284）
相关项目：基于声发射数据的岩体损伤区表征及多场耦合效应研究

关键词：岩石破裂过程, 三维数值模拟, 并行计算, 分区破裂, rock failure process, three-dimensional numerical simulation, parallel computing, zonal disintegration

中文摘要：

岩石破裂过程中裂纹的萌生、扩展、贯通和相互作用都呈空间三维分布,采用三维数值模拟才能更真实地模拟岩石的破裂过程。基于东北大学的大规模并行计算环境,利用RFPA3D-Parallel程序进行了含孔岩石试样在单轴、双轴和三轴加载条件下破裂过程的数值模拟。数值模拟表明：①数值模拟再现了单轴载荷作用下孔洞周边裂纹区的分布规律,这证实了数值模拟程序的正确性;②在双轴压缩载荷作用下,试样的承载能力的提高非常有限,含孔试样的破裂模式为劈裂破裂,破裂面大致平行于加载平面;③在三轴压缩条件下,试样的承载能力大幅度提高,试样的破裂模式与最大主应力的作用方向有关,在平行于孔轴的高压应力和侧向约束条件下孔周围岩才会发生分区破裂。

英文摘要：

The initiation,propagation and coalescence of cracks during rock failure are always in three-dimensional distribution,so the three-dimensional simulation would be more helpful in capturing the three-dimensional failure process of rock.In this paper,firstly,under the parallel computing environment in Northeastern University of China,a numerical code capable for simulating three-dimensional failure process of rock,RFPA3D-Parallel code,is used to simulate the failure process of rock specimen with a pre-existing circular opening under uniaxial,biaxial and triaxial loading conditions.The numerical simulations indicate that：（1） the cracking patterns around the opening under uniaxial compression are well predicted,validating the capability of RFPA3D-Parallel in simulating the cracking zone around the opening;（2） under the biaxial compression the failure surface parallel to the loading plane is observed;（3） the complex failure patterns under the combination of triaxial loading conditions are numerically simulated,and the zonal disintegration around the opening can be captured when the rock specimen is highly compressed in the direction of the axis of hole and is confined in other two directions.

同期刊论文项目