Additively manufactured plate lattice interpenetrating composites with high yield strength and energy absorbing capability

IF 6.3 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composite Structures Pub Date : 2024-11-17 DOI:10.1016/j.compstruct.2024.118709

Xiaobo Wang , Bo Song , Hanxing Zhu , Zhi Zhang , Lei Zhang , Yusheng Shi

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Abstract

Mechanical metamaterials with plate lattice architectures have been proven to possess specific stiffness and strength superior to that of traditional truss lattice structures. Current research mainly focuses on the mechanical properties of plate lattice skeletons, leaving interpenetrating composites with plate lattice architectures unexplored. In this work, plate lattice interpenetrating composites have been prepared by filling epoxy resin matrix to additively manufactured stainless steel plate lattice skeletons. By conducting uniaxial quasi-static compression tests and performing finite element analysis, mechanical performance and deformation patterns of plate lattice interpenetrating composites have been revealed. Results show that Young’s modulus and yield strength of plate lattice skeletons can be greatly enhanced by introducing an epoxy resin matrix to form interpenetrating composites. In addition, interpenetrating composites have been observed to deform stably without shear damage or fracture, facilitating the increase of energy-absorbing capability. Specific energy absorption of interpenetrating composites is up to three times higher than that of corresponding pure skeletons, which could extend the potentials of plate lattice metamaterials in energy-absorbing applications.

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具有高屈服强度和能量吸收能力的叠加制造板格互穿复合材料

事实证明，具有板格结构的机械超材料具有优于传统桁架格结构的特定刚度和强度。目前的研究主要集中在板格骨架的机械性能上，而对板格架构的互穿复合材料的研究则相对较少。在这项研究中，通过在加成制造的不锈钢板格骨架中填充环氧树脂基体，制备了板格互穿复合材料。通过进行单轴准静态压缩试验和有限元分析，揭示了板格互穿复合材料的力学性能和变形模式。结果表明，通过引入环氧树脂基体形成互穿复合材料，可大大提高板晶格骨架的杨氏模量和屈服强度。此外，还观察到互穿复合材料能够稳定变形，不会出现剪切损伤或断裂，从而有助于提高能量吸收能力。互穿复合材料的比能量吸收能力比相应的纯骨架高出三倍，这可以扩展板晶格超材料在能量吸收应用方面的潜力。

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来源期刊

Composite Structures 工程技术-材料科学：复合

CiteScore

12.00

自引率

12.70%

发文量

1246

审稿时长

78 days

期刊介绍： The past few decades have seen outstanding advances in the use of composite materials in structural applications. There can be little doubt that, within engineering circles, composites have revolutionised traditional design concepts and made possible an unparalleled range of new and exciting possibilities as viable materials for construction. Composite Structures, an International Journal, disseminates knowledge between users, manufacturers, designers and researchers involved in structures or structural components manufactured using composite materials. The journal publishes papers which contribute to knowledge in the use of composite materials in engineering structures. Papers deal with design, research and development studies, experimental investigations, theoretical analysis and fabrication techniques relevant to the application of composites in load-bearing components for assemblies, ranging from individual components such as plates and shells to complete composite structures.