高速冲击问题的离散元法数值模拟

Numerical simulation for high-speed impact problems by discrete element method

以能量等效为原则,构建了新的求解弹塑性轴对称问题的离散元模型。通过引入断裂准则,使模型不仅可以应用于连续介质问题,还可以应用于从连续介质向非连续介质的动态转化过程。最后,通过模拟钢板受冲击载荷产生层裂的过程,说明模型在高速冲击问题中的适用性及其有效性。

A new discrete element method （DEM） model for elastoplastic axi-symmetric problems is established based on the principle of energy equivalence. By introducing a failure criterion, the DEM can be extended to model the transition from a continuum to a non-continuum. Moreover, an example of a steel plate impacted by a steel bullet with a high speed is given, which demonstrate the applicability and effectiveness of the DEM model.