球头落锤冲击下金字塔点阵夹芯板结构的动态响应实验

Experiment of dynamic response of multilayered pyramidal lattices during ball hammer collision loading

为研究金字塔点阵夹芯板结构在球头落锤碰撞冲击下的抗冲击性能,采用模型实验的方法,加工制作了金字塔点阵4层夹芯板实验模型。通过实验得到了金字塔点阵夹芯板结构在碰撞冲击载荷作用下的坍塌变形过程和变形模式,揭示了点阵结构夹芯层的吸能机理。结果表明,在球头落锤的中等强度冲击载荷下,整个夹芯板结构的最终变形可划分为迎冲面、夹层和背冲面3个区域,形成类似"三明治"式的变形模式。

To investigate the shock resistance of multi-layered pyramidal lattice panels impacted by a ball hammer, we carried out an experiment of 4-layered pyramidal lattices under the impact of a ball hammer, analyzed the collapse deformation process and mode, and put forward the energy absorption mechanism. Our results show that, when subjected to a medium impact of a ball hammer, the final deformation of the multilayered pyramidal lattice panels can be composed of three parts where deformation occurs, head-on, interlayer, and backside, thus forming a ＂sandwich＂-like deformation mode.