Key Laboratory of Bionic Engineering, Ministry of Education, Jilin University, Changchun 130022, People's Republic of China.
State Key Laboratory Automot Safety and Energy, Tsinghua University, Beijing 100084, People's Republic of China.
Bioinspir Biomim. 2024 Jun 27;19(4). doi: 10.1088/1748-3190/ad580a.
In order to enhance energy absorption, this study draws inspiration from the diagonal bilinear robust square lattice structure found in deep-sea glass sponges, proposing a design for thin-walled structures with superior folding capabilities and high strength-to-weight ratio. Firstly, the crashworthiness of bionic glass sponge tube (BGSTO) is compared with that of equal-wall-thickness equal-mass four-X tube through both experiments and simulations, and it is obtained that the specific energy absorption of BGSTO is increased by 78.64%. And the crashworthiness of BGSTO is also most significant compared to that of multicellular tubes with the similar number of crystalline cells. Additionally, we found that the double-line spacing of the glass sponge can be freely adjusted without changing the material amount. Therefore, based on BGSTO, we designed two other double-line structures, BGSTA and BGSTB. Then with equal wall thickness and mass as a prerequisite, this study proceeds to design and compare the energy absorption properties of three bilinear thin-walled tubes in both axial and lateral cases. The deformation modes and crashworthiness of the three types of tubes with variable bilinear spacing () are comparatively analysed. The improved complex proportional assessment (COPRAS) synthesis decision is used to obtain that BGSTO exhibits superior crashworthiness over the remaining two kinds of tubes. Finally, a surrogate model is established to perform multi-objective optimization on the optimal bilinear configuration BGSTO selected by the COPRAS method.
为了提高能量吸收能力，本研究从深海玻璃海绵中发现的对角线双线性稳健方晶格结构中汲取灵感，提出了一种具有卓越折叠能力和高强度重量比的薄壁结构设计。首先，通过实验和模拟比较了仿生玻璃海绵管（BGSTO）与等壁厚等质量的四-X 管的耐撞性，结果表明 BGSTO 的比吸能提高了 78.64%。与具有相似晶胞数量的多孔管相比，BGSTO 的耐撞性也最为显著。此外，我们发现玻璃海绵的双行间距可以在不改变材料量的情况下自由调整。因此，基于 BGSTO，我们设计了另外两种双行结构，BGSTA 和 BGSTB。然后，在等壁厚和等质量的前提下，设计并比较了三种双线性薄壁管在轴向和横向情况下的能量吸收性能。分析了三种具有可变双线性间距（）的管的变形模式和耐撞性。采用改进的复杂比例评估（COPRAS）综合决策方法得出，BGSTO 的耐撞性优于其余两种管。最后，建立了一个代理模型，对 COPRAS 方法选择的最优双线性配置 BGSTO 进行多目标优化。
