Numerical Simulation on AE Characteristics of Three-Point-Bending Beams
Based on physical model of three-point-bending test, the AE characteristics of three-point-bending beam with different span were simulated by using RFPA3D (real failure process analysis) code. Simulation results show that the span affects the AE characteristics significantly. With the increasing of span, the occurrence of AE events decreases remarkably. The span affects the peak load of three-point-loading test and the fracture mode significantly. With the increasing of span,both the peak load and material brittleness decreases and the time needed to come to the peak load increases.The AE pictures, elastic modulus pictures and displacement-load curves were provided respectively.By analyzing the fracture process, tension stress on crack peak is the mainly reason for crack spread . The heterogeneity of rock has great influence on the crack propagation path, which leads the crack propagation path becoming curvilinear.
acoustic emission (AE) numerical simulation rfpa3D span three-point-bending failure process
DUAN Dong TANG Chun-an MA Tian Hui XU Tao ZHANG Zhe
Centre for Rock Instability and Seismicity Research, Northeastern University, Shenyang 110004, Liaon Centre for Material Failure Modeling Research, Dalian University, Dalian 116622, Liaoning, China;Cen Centre for Material Failure Modeling Research, Dalian University, Dalian 116622, Liaoning, China
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
398-402
2007-04-17（万方平台首次上网日期，不代表论文的发表时间）