梯度屈曲诱导蜂窝结构的面外压溃性能研究

Study on Out-of-plane Collapse Performance of Gradient Buckling-induced Honeycomb Structure

在传统蜂窝结构中引入几何诱导构型呈梯度变化的模式,得到一种新型梯度屈曲诱导蜂窝结构。利用数值模拟方法,研究梯度屈曲诱导蜂窝结构的准静态面外压溃性能。结果表明,屈曲诱导蜂窝结构的变形模式受诱导参数的梯度变化控制,通过诱导层段稳定性参数和形状参数的梯度设置,可以调控发生局部屈曲的位置和次序。梯度诱导构型的设计能够有效降低蜂窝结构的初始峰值载荷。随着稳定性参数梯度变化指数和形状参数梯度变化指数的增大,单位质量能量吸收和平均压溃载荷逐渐减小,蜂窝结构的压溃耗能过程变得更平稳。

A new gradient buckling-induced honeycomb structure was obtained by introducing the mode of geometric induced configuration gradient change in the traditional honeycomb structure.The quasi-static out-of-plane collapse performance of gradient buckling-induced honeycomb structures was studied by numerical simulation method.The results show that the deformation mode of buckling-induced honeycomb structure is controlled by the gradient change of induced parameter,and the position and order of local buckling can be controlled by the gradient setting of the induced layer stability parameter and shape parameter.The design of gradient-induced configuration can effectively reduce the initial peak load of honeycomb structure.With the increase of the gradient change index of stability parameter and the gradient change index of shape parameter,the energy absorption per unit mass and the average collapse load gradually decreased,and the collapse energy dissipation process of honeycomb structure becomes more stable.