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Composite structural modeling and tensile mechanical behavior of graphene reinforced metal matrix composites

石墨烯增强金属基复合材料的结构建模与拉伸模拟

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Abstract

Owing to its distinguished mechanical stiffness and strength, graphene has become an ideal reinforcing material in kinds of composite materials. In this work, the graphene (reduced graphene oxide) reinforced aluminum (Al) matrix composites were fabricated by flaky powder metallurgy. Tensile tests of pure Al matrix and graphene/Al composites with bioinspired layered structures are conducted. By means of an independently developed Python-based structural modeling program, three-dimensional microscopic structural models of graphene/Al composites can be established, in which the size, shape, orientation, location and content of graphene can be reconstructed in line with the actual graphene/Al composite structures. Elastoplastic mechanical properties, damaged materials behaviors, graphene-Al interfacial behaviors and reasonable boundary conditions are introduced and applied to perform the simulations. Based on the experimental and numerical tensile behaviors of graphene/ Al composites, the effects of graphene morphology, graphene-Al interface, composite configuration and failure behavior within the tensile mechanical deformations of graphene/ Al composites can be revealed and indicated, respectively. From the analysis above, a good understanding can be brought to light for the deformation mechanism of graphene/Al composites.

摘要

石墨烯具有优异的机械性能, 已成为众多复合材料中的理想增强体材料. 本研究采用片状粉末冶金方法制备了具有仿生叠层结构的石墨烯/铝基复合材料, 同时对纯铝基体与石墨烯/铝基复合材料进行了拉伸试验. 通过基于Python语言自主研发的复合材料结构建模程序, 可以有效建立石墨烯/铝基复合材料的三维复合结构模型, 并实现石墨烯尺寸、形貌、取向、位置与含量等可控重构分布. 通过引入组分材料力学性能、损伤行为、界面行为及边界条件等实现了石墨烯/铝基复合材料的拉伸行为模拟, 并揭示了石墨烯形貌、石墨烯/铝界面、复合构型与失效行为等复合因素的影响规律, 对理解石墨烯/铝基复合材料的变形机理提供了有力依据.

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Acknowledgements

The authors acknowledge the financial supports by the National Natural Science Foundation (51501111, 51131004), the Ministry of Science and Technology of China (2016YFE0130200), Science & Technology Committee of Shanghai (14DZ2261200, 1452 0710100 and 14JC14033 00) and 111 Project (B16032).

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Correspondence to Di Zhang  (张荻).

Additional information

Author contributions Zhang D and Su Y designed and directed the overall study. Sample preparation, tensile tests and SEM, TEM observation were carried out by Li Z, Yu Y and Zhao L, respectively. Su Y wrote the manuscript and discussed the results and analyzed the data with Li ZQ, Guo Q and Xiong D.

Conflict of interest The authors declare that they have no conflict of interest.

Yishi Su received his PhD from University of Technology of Troyes, France in 2012, and joined Professor Di Zhang’s group as a post-doctor and assistant professor at Shanghai Jiao Tong University since 2012, 2014. His research interests focus on biomimetic metal matrix composites and materials genome computation.

Di Zhang received his PhD from Osaka University, Japan. He is now a Chair Professor of Materials Science and Engineering at Shanghai Jiao Tong University in China (since 1994), the director of State Key Lab of Metal Matrix Composites and the Institute of Composite Materials at SJTU (since 2003), and the Professor of Chang Jiang Scholars Program (since 2001). Prof. Zhang has published more than 200 peer reviewed academic articles, 1 English academic book on morphology-genetic materials, and attended international conferences as invited speakers for 47 times. His research interests include the process of advanced metal matrix composites and the basic and applied research on biomimetic morphology-genetic materials.

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Su, Y., Li, Z., Yu, Y. et al. Composite structural modeling and tensile mechanical behavior of graphene reinforced metal matrix composites. Sci. China Mater. 61, 112–124 (2018). https://doi.org/10.1007/s40843-017-9142-2

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  • DOI: https://doi.org/10.1007/s40843-017-9142-2

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