星形梯度负泊松比蜂窝结构面内冲击动态响应

In-plane Impact Dynamic Response of Star-shaped Gradient Negative Poisson’s Ratio Honeycomb Structure

采用数值仿真方法对面内冲击载荷作用下的星形梯度负泊松比蜂窝结构的动态响应进行了研究.分别改变冲击速度、厚度梯度,以及角度梯度,得到了不同参数取值下蜂窝结构的变形模式、动态响应,以及能量吸收特性.结果表明:冲击速度、厚度,以及角度等参数的变化可以改变星形负泊松比结构的变形模式,影响能量吸收.星形结构基于负泊松比特性并结合功能梯度概念能得到更好的吸能结构,在舰艇防护等结构抗冲击领域有工程价值.

The dynamic response of honeycomb structure with star gradient and negative Poisson’s ratio under in-plane impact load was studied by numerical simulation.By changing the impact velocity,thickness gradient and angle gradient respectively,the deformation mode,dynamic response and energy absorption characteristics of honeycomb structure with different parameters were obtained.The research shows that the change of impact velocity,thickness and angle can change the deformation mode of star-shaped negative Poisson’s ratio structure and affect the energy absorption.Based on the negative Poisson’s ratio and the concept of functional gradient,the star structure can get a better energy-absorbing structure,which has engineering value in the field of structural impact resistance such as ship protection.