Abstract Hierarchical structures have the potential advantage of enhancing their energy absorption capabilities. Honeycomb-like hierarchical structures are developed and manufactured by perforating on the cell walls consisting of single thickness inclined walls and double thickness vertical walls. The out-of-plane dynamic crushing experiments on metal honeycomb-like hierarchical structures with perforated walls are carried out to explore the failure modes and energy absorption mechanism. The impact failure modes of honeycomb-like hierarchical structures under different impact velocities are obtained. The corresponding numerical simulations are also performed. It is shown that the numerical results are in good agreement with experimental data. The dynamic mean crushing stress of the honeycomb-like hierarchical structures is larger than the quasi-static mean crushing stress. The mean crushing stress, total energy absorption, specific energy absorption of honeycomb-like hierarchical structures of perforations on double walls are larger than those of perforations on single walls with the same mass. Results from parametric study of factors that influence the dynamic crushing response of honeycomb-like hierarchical structures are presented. Compared with the uniform perforation design, the perforation gradient designs increase the mean crushing stress.

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具有穿孔壁的蜂窝状分层结构的动态破碎行为：实验和数值研究

摘要 层次结构具有增强其能量吸收能力的潜在优势。蜂窝状分层结构是通过在由单厚度倾斜壁和双厚度垂直壁组成的单元壁上穿孔来开发和制造的。对具有穿孔壁的金属蜂窝状分层结构进行了面外动态破碎实验，以探索破坏模式和能量吸收机制。得到了蜂窝状分层结构在不同冲击速度下的冲击破坏模式。还进行了相应的数值模拟。结果表明，数值结果与实验数据吻合良好。蜂窝状分层结构的动态平均压碎应力大于准静态平均压碎应力。双壁穿孔蜂窝状分层结构的平均压碎应力、总吸能、比吸能均大于相同质量的单壁穿孔。介绍了影响蜂窝状分层结构动态破碎响应的因素的参数研究结果。与均匀穿孔设计相比，穿孔梯度设计增加了平均压碎应力。双壁穿孔蜂窝状分层结构的比能量吸收比相同质量的单壁穿孔大。介绍了影响蜂窝状分层结构动态破碎响应的因素的参数研究结果。与均匀穿孔设计相比，穿孔梯度设计增加了平均压碎应力。双壁穿孔蜂窝状分层结构的比能量吸收比相同质量的单壁穿孔大。介绍了影响蜂窝状分层结构动态破碎响应的因素的参数研究结果。与均匀穿孔设计相比，穿孔梯度设计增加了平均压碎应力。