构型化石墨烯纳米片<strong>/2009Al</strong>复合材料热膨胀系数模拟

doi:10.11900/0412.1961.2022.00333

金属学报

2024, Vol. 60

Issue (7): 977-989 DOI: 10.11900/0412.1961.2022.00333

研究论文

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构型化石墨烯纳米片/2009Al复合材料热膨胀系数模拟

周丽¹, 张明远¹, 杨欣盛¹(

), 刘振宇²(

), 王全兆², 肖伯律², 马宗义²

1 烟台大学机电汽车工程学院烟台 264005
2 中国科学院金属研究所师昌绪先进材料创新中心沈阳 110016

Simulation of Thermal Expansion Coefficient of Configurational GNPs/2009Al Composites

ZHOU Li¹, ZHANG Mingyuan¹, YANG Xinsheng¹(

), LIU Zhenyu²(

), WANG Quanzhao², XIAO Bolv², MA Zongyi²

1 School of Electromechanical and Automotive Engineering, Yantai University, Yantai 264005, China
2 Shi -changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

引用本文:

周丽, 张明远, 杨欣盛, 刘振宇, 王全兆, 肖伯律, 马宗义. 构型化石墨烯纳米片/2009Al复合材料热膨胀系数模拟[J]. 金属学报, 2024, 60(7): 977-989.
Li ZHOU, Mingyuan ZHANG, Xinsheng YANG, Zhenyu LIU, Quanzhao WANG, Bolv XIAO, Zongyi MA. Simulation of Thermal Expansion Coefficient of Configurational GNPs/2009Al Composites[J]. Acta Metall Sin, 2024, 60(7): 977-989.

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摘要:

石墨烯纳米片/Al复合材料热特性与其微观组织密切相关，但尚缺系统性的从微观结构模拟到热学性能预测。本工作利用有限元软件ABAQUS建立了微观石墨烯纳米片/2009Al复合材料三维模型，分析了石墨烯纳米片分布形式、几何构型和体积分数对复合材料热膨胀系数的影响。结果表明，复合材料的热膨胀系数受石墨烯纳米片的分布形式影响较小。只有当石墨烯纳米片在基体内的分布形式为2簇时，热膨胀系数比其他分布形式小。石墨烯纳米片几何构型和体积分数对热膨胀系数影响明显。随着石墨烯纳米片体积分数的增加，复合材料热膨胀系数逐渐减小。与基体相比，当复合材料中石墨烯纳米片的体积分数为2.5%，且呈集聚分布时，热膨胀系数下降幅度最大，约为27%。通过与实验结果对比，验证了模型的正确性。

关键词 ：构型, 有限元模拟, 石墨烯纳米片/2009Al复合材料, 热膨胀系数

Abstract：

Nanocomposites comprising of graphene nanoplatelets (GNPs) and aluminum (Al) have gained tremendous interest over the past few decades owing to their exceptional mechanical, thermal, and electrical properties. The microstructure of GNPs in these composites, such as dispersion, and orientation, significantly affects the loading capacity and thermal properties. However, previous studies on the mechanical properties have overshadowed investigations into the thermal expansion coefficient of GNPs/Al composites with different microstructures. In this study, a three-dimensional model of microscopic GNPs/2009Al composites was established using the finite element method and the software ABAQUS. The effects of the distribution, geometric configuration, and volume fraction of graphene nanoplatelets on the thermal expansion coefficient of the composite were analyzed. Results show that the thermal expansion coefficient of the composite is less affected by the distribution form of graphene nanoplatelets. However, when the distribution form of graphene nanoplatelets is 2 clusters, the thermal expansion coefficient is smaller than other distribution forms. Moreover, the geometry and volume fraction of graphene nanoplatelets have a significant effect on the thermal expansion coefficient. An increase in the volume fraction of graphene nanoplatelets leads to a decrease in the thermal expansion coefficient of the composites. When the volume fraction of graphene nanoplatelets in the composite is 2.5% and the aggregate distribution is bundled, the thermal expansion coefficient decreases the most (by about 27%) compared to the matrix. By comparing with experimental results, the validity of the model is verified. The conclusions of this study can provide a theoretical basis for designing and optimizing the configuration of graphene nanoplatelets/aluminum matrix composites.

Key words： configuration finite element simulation GNPs/2009Al composites coefficient of thermal expansion

收稿日期: 2022-07-08

ZTFLH:

TG339

基金资助:国家自然科学基金项目(51931009);国家自然科学基金项目(52120105001);山东省自然科学基金项目(ZR2023ME097)

通讯作者: 刘振宇，zyliu@imr.ac.cn，主要从事金属基复合材料和搅拌摩擦焊接与加工的研究;
杨欣盛，yxsjump@163.com，主要从事金属基复合材料大变形及模拟计算的研究

Corresponding author: LIU Zhenyu, associate professor, Tel: (024)23971749, E-mail: zyliu@imr.ac.cn;

作者简介: 周丽，女，1971年生，教授，博士

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图1 石墨烯纳米片(GNPs)/2009Al复合材料的代表性体积元(RVE)模型

图2 局部坐标与材料方向

表1 有限元模拟中的材料特性[25,26]

图3 相对面的2个对应节点

图4 边界条件

图5 GNPs不同分布形式的复合材料RVE

图6 不同GNPs分布形式下GNPs/2009Al复合材料X方向的应力(σ11)分布

图7 不同分布形式下GNPs的σ11分布

图8 不同GNPs分布形式下GNPs/2009Al复合材料X方向的应变(ε11)分布

图9 不同GNPs分布形式下GNPs的ε11分布

图10 GNPs分布形式对GNPs/2009Al复合材料热膨胀系数的影响

图11 典型GNPs几何构型复合材料的RVE模型

图12 不同GNPs构型GNPs/2009Al复合材料的σ11分布

图13 不同GNPs构型GNPs/2009Al复合材料GNPs的σ11分布

图14 不同GNPs构型GNPs/2009Al复合材料的ε11分布

图15 不同构型GNPs的ε11分布

图16 不同角度的点路径示意图

图17 不同路径上各点的应变

图18 GNPs构型对GNPs/2009Al复合材料热膨胀系数的影响

图19 GNPs/2009Al复合材料热膨胀系数随GNPs体积分数的变化

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