蜂窝夹芯叠层板的低速冲击接触定律

借助于蜂窝夹芯叠层板（以下简称蜂窝板）的准静态横向压力实验，研究了蜂窝板的低速冲击接触规律，提出了半经验性的蜂窝板低速冲击接触定律，蜂窝板低速冲击接触过程分为四个阶段：即面反控制阶段；面板穿透阶段；蜂窝夹芯控制阶段；总体卸载阶段，并提出了相应各阶段的加载或卸载定律，应用此接触定律对蜂窝板的低速冲击过程进行动态有限元模拟分析，模拟计算结果与实验结果相比较具有良好的一致性。

Indentation Law for Honeycomb Core Sandwich Composites

Quasi static transverse indentation tests of composite sandwich plates were carried out to study the contact law of honeycomb core sandwich panels. The empirical contact laws were raised to determine the contact force due to low velocity impact between the impactor and the panel. The contact process of the composite sandwich plate subjected low velocity impact could be divided into four stages i.e . controlling loading stage for facesheets,penetration stage for facesheets,controlling loading stage for honeycomb core,overall unloading stage.The loading or unloading laws for each stage were set up by the test.By using of a dynamic finite element analysis program with aforementioned contact laws, the numerical simulation of the impact history of composite sandwich plates due to low velocity impacts was performed, the numerical results agreed fairly well with the test data.