冰雹冲击复合材料层合板仿真研究

摘要

The impact of hailstones on aircraft with cruise velocity is probable to cause damage or delamination in composite structures.In order to analyze the hail resistant behavior of composite materials,the numerical simulation on the process of hail impacting composite panels were carried out by using finite element analysis software ANSYS /LS-DYNA. The Smooth Particle Hydrodynamic (SPH)approach was used to capture the highly complex and non-linear behavior of the hailstone impacting on a rigid target.Then a validated hail model was introduced in modeling of hailstone impact on composite structures,in which the delamination was also considered using cohesive zone methodology (CZM).Good agreement can be stated between the simulation and experiment.Based on this,the influence of different parameters on the damage of panels were analysed.%针对飞机空中受冰雹撞击会造成复合材料结构分层或损伤问题，用有限元软件 ANSYS ／LS-DYNA 对复合材料的抗冰雹冲击行为进行分析。采用光滑质点流体动力学方法（Smooth Particle Hydrodynamic，SPH）模拟冰雹冲击刚性平板的高度非线性力学行为。通过对比模拟结果与实验数据知两者吻合较好，验证冰雹模型的准确性。将该模型引入冰雹冲击复合材料结构模型，采用粘聚区模型（Cohesive Zone Model，CZM）预测复合材料结构的分层损伤，获得合理计算结果；并分析冰雹撞击层合板损伤情况及不同参数对层合板损伤影响。