In this study, we establish the hybrid dynamic shear-lag model to systemically investigate the effects of reinforcement heterogeneity on the impact performance of hybrid composites. Two key parameters – linear stiffness and linear density of the reinforcement – are found to play critical roles. To optimize the energy absorption, the hybrid unit cell should employ reinforcements with the same linear density but different linear stiffness. Further, tailoring the properties and geometries of constituents (e.g., the viscosity of the matrix) could greatly enhance the total energy absorption while avoiding severely localized energy distributions in the matrix. Our model provides feasible optimization guidance to the hybrid composites design for ballistic-proof applications.

在这项研究中，我们建立了混合动力剪切滞后模型，系统地研究了增强非均质性对混合复合材料冲击性能的影响。发现两个关键参数-钢筋的线性刚度和线性密度-发挥关键作用。为了优化能量吸收，混合单元电池应采用线密度相同但线刚度不同的增强材料。此外，调整成分的特性和几何形状（例如，基质的粘度）可以极大地增强总能量吸收，同时避免基质中的严重局限性能量分布。我们的模型为防弹应用的混合复合材料设计提供了可行的优化指导。