|
| A method in finite element simulation for fracture process of rock-concrete materials |
| Revised:May 27, 2006 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20082047 |
| KeyWord:ANSYS,anisotropic materials,fracture,numerical simulation,remeshing |
| ZHOU Shang-zhi DANG Fa-ning CHEN Hou-qun LONG Qiao-ling |
|
| Hits: 1895 |
| Download times: 24 |
| Abstract: |
| Grid remeshing in the finite element numerical simulation of the fracture and damage of rock and concrete materials is based on the unit inference between the unit distortion and fracture media as the base for the grid remeshing.The geometry body restructure technology is adopted to decompose the geometry into several parts to realize the hexahedron grid remeshing in ANSYS.Also,the volume judgement method is used to determine the new structural nodes in the unit coding of the old units.In the field quantity transformation,the equal-parametric finite element inverse transformation based on the analytical characters is adopted to transform the field quantity information in the old grids into the new grids.This paper deals with the second development of ANSYS and the realization of 3D grid remeshing.Two judgement evidences such as the unit distortion,and boundary surface interference are used to remesh grid.Before the grids are remeshed,the geometry body should be reconstructed;and node,line and surface information after the deformation can be extracted to generate new entities.Accordingly,ANSYS function and volume judgement method can be fully used to find the positions of new nodes in the old grids.And at same time,the equal-parametric unit method based on the analytical inversion can be used in the field quantity transformation between the new and old grids.Therefore,3D finite element grid remeshing technology can be realized on the platform.Finally,the single axis compression fracture simulation computation with square materials is used to test the variation in loading information of equal-plastic strain distribution,whereby proving the correctness of the developed system |
|
|
|