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Microstructure design and mechanical properties of grain-gradient graphene/aluminum composites
被引:7
作者:
Liu, Li-Ya
[1
,2
]
Yang, Qing-Sheng
[1
]
Liu, Xia
[1
]
机构:
[1] Beijing Univ Technol, Dept Engn Mech, Beijing 100124, Peoples R China
[2] Tsinghua Univ, Dept Engn Mech, Appl Mech Lab, Beijing 100084, Peoples R China
基金:
中国国家自然科学基金;
关键词:
Grain -gradient graphene;
Al composites;
Microstructure design;
Crystal plasticity;
Cohesive zone model;
Mechanical properties;
Damage mechanism;
CARBON NANOTUBES;
GRAPHENE NANOPLATELETS;
CRACK-GROWTH;
ALUMINUM;
DEFORMATION;
NANOCOMPOSITES;
BEHAVIORS;
EVOLUTION;
SIZE;
D O I:
10.1016/j.engfracmech.2022.108944
中图分类号:
O3 [力学];
学科分类号:
08 ;
0801 ;
摘要:
The metal matrix with mixed grain-gradient structure and the graphene with different charac-teristics could be designed and prepared to ameliorate the plasticity and toughness reduction of the metal matrix composites (MMCs) caused by graphene reinforcement. However, the rela-tionship between the microstructure and the mechanical properties of composites needs to be investigated. In this paper, a self-developed structural modeling program is employed to design and establish a single-edge notch tensile finite element model of the graphene reinforced grain -gradient aluminum (Al) matrix composites, where the distribution and morphology of gra-phene and grains can be redistributed. Then, the grain size dependence of yield strength is introduced into the developed crystal plasticity finite element method (CPFEM) according to the classical Hall-Petch relationship, the damage mechanism of the graphene/Al composites with various designed novel microstructures is analyzed in combination with the cohesive zone model (CZM), and the microstructure of the graphene/Al composites with optimal mechanical properties is obtained. In addition, it is found that the failure mode, strength and toughness of the com-posites could be ameliorated by adjusting the bonding state of graphene-Al interface. This study provides a new insight into the microstructure design and fabrication of the graphene/Al com-posites with optimal comprehensive properties.
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页数:16
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