Multiscale Numerical Simulation of Time and Space in Fracture Process of Three-Point-Bending Concrete Beam with Offset Notch
In order to accurately analyze the dynamic fracture process of a three-point-bending concrete beam with an offset notch, based on the basic theories and characteristics of Discrete Element Method (DEM) and Finite Element Method (FEM), the multiscale numerical model of time and space by coupling DEM and FEM of three-point-bending concrete beam with offset notch was established, and the multiscale algorithm of element/mesh momentum transfer in the coupling zone between DEM and FEM was deduced.Using the multiscale numerical model of three-point-bending concrete beam, the generating and the extending processes and rules of cracks in concrete beam under condition of different offset distances of notch were analyzed at macro-and meso-levels. The simulated results are in agreement with the experimental ones. Comparing the computation time of the multiscale model and that of the DEM model in the example of three-point-bending concrete beam, the former accomplished the heterogeneous mesoscopic simulations of the latter, at the same time, the former was much more efficient than the latter.
Multiscale numerical simulation of time and space coupling DEM and FEM the algorithm of element/mesh momentum transfer three-point-bending concrete beam with offset notch crack extension
Rui Zhang Zhiping Tang
Key Laboratory of Terrain-machine Bionics Engineering,Ministry of Education,Jilin University,Changch Department of Modem Mechanics,University of Science and Technology of China,Hefei,Anhui,230026,China
国际会议
北京
英文
308-316
2008-09-24（万方平台首次上网日期，不代表论文的发表时间）