Buckling evolution and energy dissipation of 3D-printed second-order fractal bio-inspired structures

IF 4 2区工程技术 Q1 ENGINEERING, MECHANICAL

Acta Mechanica Sinica Pub Date : 2026-09-12 DOI:10.1007/s10409-026-51189-x

Dandan Gao (, ), Hao Yan (, ), Ying Zhou (, ), Tao Wang (, ), Guangyan Huang (, )

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引用次数: 0

Abstract

Bio-inspired lightweight, high-impact structures possess exceptional energy-absorption capabilities, and their performance optimization is crucial for industries such as aerospace, transport, and protective equipment. Inspired by spider web and marsh horsetail structures, in this study, circular and ortho-hexagonal thin-walled structures with internal interconnecting ribs and second-order layering were prepared using polylactic acid (PLA) as the raw material by 3D printing. The research integrates experimental tests (including quasi-static compression and drop-weight impact), characterization analysis (digital image correlation (DIC)), finite element numerical simulations, and theoretical model validation, focusing on the compressive strength, buckling deformation, and energy absorption characteristics of different structures at equal mass. Results indicate that, at equal mass, the second-order hierarchical structures exhibit significantly superior compressive strength and energy absorption capabilities compared to the first-order structures. The simulation results, experimental data, and theoretical derivation show excellent agreement, revealing the buckling evolution and strengthening mechanism of the multilevel structure. The research provides valuable insights and a design framework for developing lightweight, impact-resistant multicellular structures.

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三维打印二阶分形仿生结构的屈曲演化与能量耗散

仿生轻质、高冲击结构具有卓越的能量吸收能力，其性能优化对于航空航天、运输和防护设备等行业至关重要。受蜘蛛网和沼泽马尾结构的启发，本研究以聚乳酸（PLA）为原料，采用3D打印技术制备了具有内部连接肋和二级分层的圆形和正六边形薄壁结构。本研究将实验测试（包括准静态压缩和落重冲击）、表征分析（数字图像相关（DIC））、有限元数值模拟和理论模型验证相结合，重点研究不同结构在等质量下的抗压强度、屈曲变形和能量吸收特性。结果表明，在同等质量下，二阶分层结构的抗压强度和能量吸收能力明显优于一阶结构。模拟结果、实验数据和理论推导结果吻合良好，揭示了多层结构的屈曲演化和强化机理。该研究为开发轻质、抗冲击的多细胞结构提供了有价值的见解和设计框架。

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来源期刊

Acta Mechanica Sinica 物理-工程：机械

CiteScore

5.60

自引率

20.00%

发文量

1807

审稿时长

4 months

期刊介绍： Acta Mechanica Sinica, sponsored by the Chinese Society of Theoretical and Applied Mechanics, promotes scientific exchanges and collaboration among Chinese scientists in China and abroad. It features high quality, original papers in all aspects of mechanics and mechanical sciences. Not only does the journal explore the classical subdivisions of theoretical and applied mechanics such as solid and fluid mechanics, it also explores recently emerging areas such as biomechanics and nanomechanics. In addition, the journal investigates analytical, computational, and experimental progresses in all areas of mechanics. Lastly, it encourages research in interdisciplinary subjects, serving as a bridge between mechanics and other branches of engineering and the sciences. In addition to research papers, Acta Mechanica Sinica publishes reviews, notes, experimental techniques, scientific events, and other special topics of interest. Related subjects » Classical Continuum Physics - Computational Intelligence and Complexity - Mechanics