多尺度杂化晶格结构的可调失效模式

IF 3.8 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Vacuum Pub Date : 2025-05-05 DOI:10.1016/j.vacuum.2025.114387

Andi Lai, Peiqi Liu, Ting Dai, Guo Fu

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引用次数: 0

摘要

体心立方（BCC）晶格作为一种广泛应用的晶格构型，已经成为众多研究人员提出的优化策略的主题。空化BCC晶格是一种有效的策略，但其能量吸收有限，破坏模式不稳定。本研究提出了一种新型的多尺度杂化晶格，由嵌入在BCC壳中的三周期最小表面（TPMS）微晶格组成，并使用立体光刻（SLA）制造。实验结果表明，与空心BCC晶格结构相比，多尺度杂化晶格的比能吸收提高了543.4%。以牺牲局部强度为代价，使结构的韧性指数提高了300%。此外，还发现了体积分数比的阈值可以有效地控制失效模式。相反，远离这个阈值，结构表现出稳定的逐层破坏模式。所提出的结构为需要韧性和能量吸收可靠性的应用提供了一个有希望的解决方案。

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Tunable failure mode of multi-scale hybrid lattice structures

As a widely used lattice configuration, the body-centered cubic (BCC) lattice has been the subject of numerous optimization strategies proposed by researchers. Hollowing BCC lattices is an effective strategy, but it suffers from limited energy absorption and unstable failure modes. This study proposes a novel multi-scale hybrid lattice consisting of triply periodic minimal surfaces (TPMS) micro-lattices embedded in a BCC shell and fabricated using stereolithography (SLA). Experimental results demonstrate that, compared to hollowed BCC lattice structures, the multi-scale hybrid lattice exhibits a 543.4 % increase in specific energy absorption. The toughness index of the structure increased by 300 % at the expense of partial strength. In addition, a threshold in the volume fraction ratio is found to effectively govern the failure mode. Conversely, far from this threshold, the structure exhibits a stable layer-by-layer failure mode. The proposed structure offers a promising solution for applications requiring both toughness and energy absorption reliability.

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来源期刊

Vacuum 工程技术-材料科学：综合

CiteScore

6.80

自引率

17.50%

发文量

审稿时长

34 days

期刊介绍： Vacuum is an international rapid publications journal with a focus on short communication. All papers are peer-reviewed, with the review process for short communication geared towards very fast turnaround times. The journal also published full research papers, thematic issues and selected papers from leading conferences. A report in Vacuum should represent a major advance in an area that involves a controlled environment at pressures of one atmosphere or below. The scope of the journal includes: 1. Vacuum; original developments in vacuum pumping and instrumentation, vacuum measurement, vacuum gas dynamics, gas-surface interactions, surface treatment for UHV applications and low outgassing, vacuum melting, sintering, and vacuum metrology. Technology and solutions for large-scale facilities (e.g., particle accelerators and fusion devices). New instrumentation ( e.g., detectors and electron microscopes). 2. Plasma science; advances in PVD, CVD, plasma-assisted CVD, ion sources, deposition processes and analysis. 3. Surface science; surface engineering, surface chemistry, surface analysis, crystal growth, ion-surface interactions and etching, nanometer-scale processing, surface modification. 4. Materials science; novel functional or structural materials. Metals, ceramics, and polymers. Experiments, simulations, and modelling for understanding structure-property relationships. Thin films and coatings. Nanostructures and ion implantation.