In this work, a new hierarchical lattice design is proposed by replacing the original straight beams of face-centered cubic (FCC) lattice with a string of higher-level circular beams from the perspective of forming more plastic hinges to improve the energy absorption capacity. The quasi-static compression behavior of our proposed lattice is thoroughly investigated by finite element simulation, theoretical modeling and experimental testing. The experimental specimens made from 316L steel are additively manufactured using the selected laser melting technique. Satisfactory agreement is achieved between the theoretically, numerically and experimentally obtained SEA. It indicates that the proposed lattices have better energy absorption than the conventional FCC lattice. Parametric studies are carried out to investigate the influence of various geometric parameters and indicate that the specific energy absorption and the crushing force efficiency can be simultaneously enhanced by the proposed hierarchical design with proper number of higher-level circular beams. In addition, the auxetic effect is exhibited by the new lattice structures, in accordance with the enhanced energy absorption properties.

在这项工作中，从形成更多塑性铰以提高能量吸收能力的角度，提出了一种新的分层晶格设计，通过用一串更高级别的圆形梁代替面心立方（FCC）晶格的原始直梁。我们提出的晶格的准静态压缩行为通过有限元模拟、理论建模和实验测试进行了彻底的研究。由 316L 钢制成的实验样品是使用选定的激光熔化技术增材制造的。在理论上、数值上和实验上获得的 SEA 之间取得了令人满意的一致性。这表明所提出的晶格比传统的 FCC 晶格具有更好的能量吸收。进行参数研究以研究各种几何参数的影响，并表明通过建议的分层设计和适当数量的更高级别的圆形梁，可以同时提高比能量吸收和破碎力效率。此外，根据增强的能量吸收特性，新的晶格结构表现出拉胀效应。