Simulation of Fracture around a Circular Opening in Rock by Parallel Computing
Uniaxial compression tests were performed by using a numerical code RFPA3D on a rock specimen with a circular opening to investigate the size (boundary) effect on the fracture and collapse process. To model the observed damage zone and coalescence around the opening, a parallel computing method was applied to calculate the stress and displacement field. The numerical specimens were considered to be heterogeneous by assigning random values to the mechanical parameters (strength, elastic modulus and Poisson ratio etc.) for each element throughout the whole specimen according to a certain distribution function. The numerical results found that the strength decreased with the size of circular opening. It is shown that the circular opening size influenced the fracture mode as well as the peak strength. For the specimen with the smallest hole, the opening collapsed in shear mode, while for the specimen with the biggest hole, it collapsed in tensile mode. By comparing with the laboratory experimental study, the numerical results had a good agreement with the experimental results. The numerical code was proved to be able to reproduce the damage zone observed in the laboratory test and capable of simulating the localization behavior of the rock-like brittle materials.
LIANG Zhengzhao ZHAI Xinxian XU Tao TANG Chunan
Civil and Hydraulic Engineering School, Dalian University of Technology, Dalian 116024, Liaoning, Ch Civil and Hydraulic Engineering School, Dalian University of Technology, Dalian 116024, Liaoning, Ch
国际会议
The 2007 International Symposium on Safety Science and Technology(2007采矿科学与安全技术国际学术会议)
河南焦作
英文
513-517
2007-04-17（万方平台首次上网日期，不代表论文的发表时间）