Enhancement of dynamic fracture toughness in biomimetic 3D printed double-helicoidal composites

IF 5.1 2区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Impact Engineering Pub Date : 2025-01-14 DOI:10.1016/j.ijimpeng.2025.105227

Xiaodong Wu, Ziting Jia, Lianhao An, Runzhi Li, Zhi Zhao, Zhiqiang Li

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引用次数: 0

Abstract

The dynamic fracture behaviors of biomimetic 3D printed double-helicoidal composites were fully characterized by performing three-point bending impact experiments and simulations in this study. Initially, the biomimetic composites were designed and fabricated based on the structure of collagenous fibrils, while single-helicoidal composites were also prepared for comparison. Subsequently, the impact responses and the crack modes of the biomimetic composites were obtained by conducting impact experiments. The dynamic fracture toughness of the biomimetic composites was assessed using the effective surface energy and dynamic stress intensity factor. Finally, finite element analysis was employed to analyze the interlayer stress distribution and the crack propagation under impact loading. Our investigation clearly demonstrates that double-helicoidal structures exhibit superior dynamic fracture toughness, as they suppress crack initiation and increase the energy dissipation required for crack propagation. This work will promote the design of next-generation impact-resistant composites.

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来源期刊

International Journal of Impact Engineering 工程技术-工程：机械

CiteScore

8.70

自引率

13.70%

发文量

241

审稿时长

52 days

期刊介绍： The International Journal of Impact Engineering, established in 1983 publishes original research findings related to the response of structures, components and materials subjected to impact, blast and high-rate loading. Areas relevant to the journal encompass the following general topics and those associated with them: -Behaviour and failure of structures and materials under impact and blast loading -Systems for protection and absorption of impact and blast loading -Terminal ballistics -Dynamic behaviour and failure of materials including plasticity and fracture -Stress waves -Structural crashworthiness -High-rate mechanical and forming processes -Impact, blast and high-rate loading/measurement techniques and their applications