Strong, lightweight structures are increasingly in demand for various engineering applications. Here we present a method to produce a lightweight lattice composite tube with hexagonal unit cells using a high production rate, textile-based method. A weft knitting process was employed for the first time to produce lattice preforms made of a common high-performance E-glass yarn. The lattice preforms were impregnated with epoxy resin to create lattice composite tubes of various sizes. The crashworthiness performance of the as-fabricated lattice composite tubes was evaluated experimentally and numerically in quasi-static axial compression tests. Based on the findings and the results of comparisons made with expanded metal tubes, the proposed lattice composite system exhibited comparable energy absorption properties. Finite element simulations provided insight into the failure mechanism of the proposed structure for predicting the energy absorption behavior of the composite lattice. The simulations revealed that further improvement was possible if global buckling could be controlled, which was carried out in the current study via polyurethane foam injection into the tube and using a concentric placement of multiple tubes of various sizes. Overall, the proposed lightweight, knitted lattice composite tube showed enhanced performance in its strength.

对于各种工程应用，越来越需要坚固，轻便的结构。在这里，我们介绍一种使用高生产率，基于纺织品的方法生产具有六角形单元孔的轻质晶格复合管的方法。首次采用纬编工艺生产由普通高性能E-玻璃纱制成的晶格预成型坯。用环氧树脂浸渍晶格预成型件以产生各种尺寸的晶格复合管。在准静态轴向压缩试验中通过实验和数值评估了所制造的晶格复合管的耐撞性能。基于发现的结果和与膨胀金属管进行的比较结果，所提出的晶格复合系统表现出可比的能量吸收性能。有限元模拟提供了对所提出结构的失效机理的洞察力，以预测复合晶格的能量吸收行为。模拟显示，如果可以控制整体屈曲，则可以进一步改善，这是在当前研究中通过将聚氨酯泡沫注入管中并使用同心放置多个尺寸的多个管来进行的。总体而言，所提出的轻质编织格子复合管在强度方面表现出增强的性能。在当前的研究中，是通过将聚氨酯泡沫注入管中并同心放置多个尺寸不同的管来进行的。总体而言，所提出的轻质编织格子复合管在强度方面表现出增强的性能。在当前的研究中，是通过将聚氨酯泡沫注入管中并同心放置多个尺寸不同的管来进行的。总体而言，所提出的轻质编织格子复合管在强度方面表现出增强的性能。