穿甲燃烧弹侵彻陶瓷复合装甲和玻璃复合装甲的FEM-SPH耦合计算模型

为了提高小口径穿甲燃烧弹侵彻陶瓷复合装甲和玻璃复合装甲（透明装甲）的仿真分析精度，本文将传统的FEM（finite element method）-SPH（smooth particle hydrodynamics）耦合计算模型中穿甲燃烧弹弹芯的有限元模型和JC（Johnson-Cook）材料模型分别替换为SPH模型和JH2（Johnson-Holmquist-ceramics）材料模型，提出了新型FEM-SPH耦合计算模型。研究表明，新型FEM-SPH耦合计算模型可以有效模拟弹芯碎裂现象，减少SPH粒子和有限元耦合计算量，进而显著提高仿真模型的计算精度和计算效率，并给出了新型FEM-SPH耦合计算模型的有限元/粒子尺度和建模尺寸的优选结果。

An FEM-SPH coupled model for simulating penetration of armor-piercing bullets into ceramic composite armors and glass composite armors

To improve the ballistic simulation accuracy of ceramic composite armors and glass composite armors (transparent armors) against small-caliber armor piercing bullets, the new FEM (finite element method) -SPH (smooth particle hydrodynamics) coupled model was proposed, which replaced the FEM model and JC (Johnson-Cook) material model of the armor-piercing-bullet core of traditional FEM-SPH coupled model with the SPH model and JH2 (Johnson-Holmquist-ceramics) material model. The results show that the new FEM-SPH coupled model can effectively simulate bullet core fragmentation and reduce FEM-SPH coupled calculation amount. So it can improve the computation accuracy and efficiency. And the FEM element/SPH particle size and armor modeling size of the new FEM-SPH coupled model are optimized.