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| Combination of FE and SPH method for impact fragmentation |
| Received:July 19, 2010 Revised:December 15, 2010 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx201105024 |
| KeyWord:hypervelocity impact FEM SPH numerical simulation debris |
| Author | Institution |
| 张晓天 |
北京航空航天大学 宇航学院,北京 |
| 贾光辉 |
北京航空航天大学 宇航学院,北京 |
| 黄海 |
北京航空航天大学 宇航学院,北京 |
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| Abstract: |
| A combined method of FE and SPH-FE reconstruction-for impact fracture is presented. The arbitrary geometry is filled by cube elements for discretization and particle-centroid-coincided model is built. Particle model is used in the SPH impact simulation by LS-dyna. Elements are reconstructed based on the simulation result of each time step. Failure analysis is applied to the reconstructed FE model and mixed result is finally acquired. HVI problems are computed with FE reconstruction method for calibration. In the result FE elements stand for large fragments while SPH particles stand for small particles. The fragmentation process can be clearly observed in the simulation. Compared with the experiment, FE reconstruction method is proved to be reliable and feasible. Based on the analysis of the FE and SPH principles, FE reconstruction method is proved to be equivalent to the Conversion method. The equivalence provides extra support to the availability and efficiency. |