Chen Xueshan, Tian Wei, Jin Xiaoke, Zhu Chenyan
College of Textile Science and Engineering, International Institute of Silk, Zhejiang Science & Technology University, Hangzhou 310018, China.
College of Material and Textile Engineering, Jiaxing University, Jiaxing 314001, China.
Materials (Basel). 2023 Mar 29;16(7):2729. doi: 10.3390/ma16072729.
This study optimized and proposed a Warren truss slot-hole structure with a double-sided, square shallow slot and vertical and horizontal corrugated symmetry, achieved with inclined holes based on the stability and a good bearing capacity of an inclined strut truss structure. The tetrahedral truss lattice cells were obverse and reverse-staggered in the central core of the structure. Compared with the double-sided, square shallow groove cylindrical straight hole, the resin consumption of the Warren truss slot holes was similar to that of a vacuum-assisted resin infusion; however, the external flat compression force of the Warren truss slot holes on the resin stiffener structure doubled, and its bending contact force increased by approximately 1.5 times. Furthermore, the resulting Warren truss-slotted resin structure exhibited a late failure time. Compared with the double-sided, square shallow groove cylindrical straight hole foam-core sandwich composite, the Warren truss slot resin-stiffener-reinforced sandwich composite exhibited an increase of 4.7 kN in the flat compression load, an improvement of ~40% in flat compressive strength performance, an increase of ~0.58 kN in the bending load, and an improvement of ~60% in the bending strength, demonstrating its better bearing strength performance.
本研究基于斜撑桁架结构的稳定性和良好承载能力，优化并提出了一种具有双面方形浅槽且垂直和水平波纹对称的华伦桁架槽孔结构，该结构通过斜孔实现。四面体桁架晶格单元在结构的中心核心处正反交错排列。与双面方形浅槽圆柱直孔相比，华伦桁架槽孔的树脂消耗量与真空辅助树脂灌注的消耗量相似；然而，华伦桁架槽孔对树脂加强结构的外部平面压缩力增加了一倍，其弯曲接触力增加了约1.5倍。此外，所得的华伦桁架开槽树脂结构具有较晚的失效时间。与双面方形浅槽圆柱直孔泡沫芯夹层复合材料相比，华伦桁架槽树脂加强筋增强夹层复合材料的平面压缩载荷增加了4.7 kN，平面压缩强度性能提高了约40%，弯曲载荷增加了约0.58 kN，弯曲强度提高了约60%，表明其具有更好的承载强度性能。
