Design and mechanical characterization of novel triply periodic minimal surface-based lattice structures with high strength and energy absorption

IF 7.1 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composite Structures Pub Date : 2026-04-15 Epub Date: 2026-01-14 DOI:10.1016/j.compstruct.2026.120062

Xiaokai Yin, Hongyu Cui, Haoming Hu, Huanqiu Xu, Tiange Yang

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引用次数: 0

Abstract

Lightweight lattice structures have become optimal candidates for structural load-bearing and energy-absorbing applications, owing to their high specific strength and superior energy absorption. Nevertheless, conventional stretch-dominated and bending-dominated lattice structures inherently trade off mechanical properties for deformation stability. Recent advancements highlight the exceptional mechanical properties of triply periodic minimal surface (TPMS)-based lattice structures, attributable to their distinctive topological configurations. This research introduces a novel skeletal lattice (NSL) based on TPMS topology to address the performance deficiencies of traditional lattices. Samples were fabricated via selective laser melting (SLM) technology, and their stress–strain responses and deformation characteristics were analyzed through quasi-static compression tests. Coupling experimental results with finite element modeling enabled a comprehensive assessment of the lattice’s compressive mechanical behavior, elucidating its deformation mechanisms. Findings reveal NSL significantly outperforms conventional lattices in specific energy absorption, specific strength, and crushing load efficiency—improving 573.2 %, 305.7 %, and 33.9 % over body-centered cubic (BCC), and 221.3 %, 7.2 %, and 157.0 % relative to Octet. This structural innovation successfully mitigates the inherent performance trade-offs of traditional lattice designs, realizing concurrent enhancements in mechanical strength, energy absorption, and deformation stability. The proposed NSL structure demonstrates broad applicability within engineering domains, including lightweight load-bearing components and high-performance energy-absorbing materials.

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具有高强度和能量吸收的新型三周期最小表面基晶格结构的设计和力学特性

轻质点阵结构由于其高比强度和优越的吸能性能，已成为结构承载和吸能应用的最佳候选者。然而，传统的拉伸主导和弯曲主导的晶格结构固有地权衡变形稳定性的力学性能。最近的进展突出了基于三周期最小表面（TPMS）的晶格结构的特殊力学性能，这归因于它们独特的拓扑结构。针对传统晶格的性能不足，提出了一种基于TPMS拓扑结构的新型骨架晶格（NSL）。采用选择性激光熔化（SLM）技术制备试样，通过准静态压缩试验分析试样的应力应变响应和变形特性。将实验结果与有限元建模相结合，可以全面评估晶格的压缩力学行为，阐明其变形机制。研究结果表明，NSL在比能量吸收、比强度和破碎载荷效率方面明显优于传统的格子——比体心立方（BCC）提高573.2%、305.7%和33.9%，比八柱体（Octet）提高221.3%、7.2%和157.0%。这种结构创新成功地减轻了传统晶格设计固有的性能权衡，实现了机械强度、能量吸收和变形稳定性的同时增强。提出的NSL结构在工程领域具有广泛的适用性，包括轻质承重部件和高性能吸能材料。

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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.