Compression resistance of CFRP/mater fractal nested structures based on self-similar fractal strategy

IF 14.2 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering Pub Date : 2025-06-07 DOI:10.1016/j.compositesb.2025.112698

Xiaoli Xu , Wenzhen Huang , Jianxing Yang , Sipei Cai , Jiacheng Wu , Yong Zhang

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引用次数: 0

Abstract

The plastic deformation of metallic structures is promising to improving the load-bearing instability of carbon fiber-reinforced polymer (CFRP) thin-walled structures. Therefore, this study proposes a novel self-similar fractal strategy of CFRP/stainless steel nested structure to fully exploit the mechanical advantages of distinct materials. The structure consists of an outer quadrilateral CFRP tube nested with an internal stainless-steel fractal substructure, named the Quadrilateral Fractal Nested Structure (QFNS). Through the compression test, it is found that the CFRP/stainless steel nested structure has more stable mechanical loading behavior compared with the pure metal structure. Numerical simulations further explored the energy contribution mechanism, which reveals that the load-bearing capacity of QFNS surpasses the combined performance of its individual components, emphasizing the significant interaction effect between internal and external structures. In addition, the fractal order, the number of paving layers and the fractal wall thickness significantly affect its crashworthiness. In particular, when the fractal order increases from 0 to 2, the specific absorption energy increases (SEA) by 122.97 %. Moreover, compared to typical CFRP/metal structures, the self-similar fractal design elevates SEA by 110.39 %. This study provides a cost-effective, lightweight solution with simplified assembly for designing high-performance protective structures.

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基于自相似分形策略的CFRP/mater分形嵌套结构抗压性能

金属结构的塑性变形有望改善碳纤维增强聚合物（CFRP）薄壁结构的承载不稳定性。因此，本研究提出了一种新的CFRP/不锈钢嵌套结构的自相似分形策略，以充分发挥不同材料的力学优势。该结构由外四边形CFRP嵌套管和内不锈钢分形子结构组成，称为四边形分形嵌套结构（QFNS）。通过压缩试验发现，与纯金属结构相比，CFRP/不锈钢嵌套结构具有更稳定的受力性能。数值模拟进一步探讨了能量贡献机制，揭示了QFNS的承载能力超过其单个部件的综合性能，强调了内外结构之间的显著相互作用效应。此外，分形顺序、铺装层数和分形壁厚对其耐撞性有显著影响。当分形阶数从0增加到2时，比吸收能（SEA）增加了122.97%。与典型的CFRP/金属结构相比，自相似分形设计使SEA提高了110.39%。这项研究为设计高性能防护结构提供了一种成本效益高、重量轻的解决方案，简化了组装。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Composites Part B: Engineering 工程技术-材料科学：复合

CiteScore

24.40

自引率

11.50%

发文量

784

审稿时长

21 days

期刊介绍： Composites Part B: Engineering is a journal that publishes impactful research of high quality on composite materials. This research is supported by fundamental mechanics and materials science and engineering approaches. The targeted research can cover a wide range of length scales, ranging from nano to micro and meso, and even to the full product and structure level. The journal specifically focuses on engineering applications that involve high performance composites. These applications can range from low volume and high cost to high volume and low cost composite development. The main goal of the journal is to provide a platform for the prompt publication of original and high quality research. The emphasis is on design, development, modeling, validation, and manufacturing of engineering details and concepts. The journal welcomes both basic research papers and proposals for review articles. Authors are encouraged to address challenges across various application areas. These areas include, but are not limited to, aerospace, automotive, and other surface transportation. The journal also covers energy-related applications, with a focus on renewable energy. Other application areas include infrastructure, off-shore and maritime projects, health care technology, and recreational products.