基于FE重构方法的冲击破碎仿真

提出了一种结合FE和SPH的3D冲击破碎问题仿真方法——FE重构法。通过立方体FE单元填充的方式对任意几何体进行离散，并建立粒子一形心重合模型，然后将用LS-dyna软件对粒子模型进行SPH撞击仿真；基于每一个步长的仿真结果，进行FE单元的重构，并结合失效准则进行失效分析，最终得到FE与SPH混合的仿真结果。针对超高速...

Combination of FE and SPH method for impact fragmentation

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.