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<p>A fundamental understanding of the load transfer and distribution mechanisms between the reinforcement and the matrix is a prerequisite for elucidating the synergistic strengthening effect among hybrid reinforcements. In this study, a three-dimensional finite element model was constructed to simulate the plastic deformation mechanism of an aluminum matrix composite synergistically reinforced with TiC particles and graphene nanoplatelets. The investigation focuses on the influence of the volume fraction and aspect ratio of graphene on the mechanical behavior of the material. The results indicate that graphene, as the primary load-bearing phase, exhibits an enhanced strengthening effect with increasing volume fraction and aspect ratio. The graphene network creates a stress-shielding effect on the TiC particles, revealing a competitive load-bearing relationship between the two reinforcement phases. Furthermore, the presence of the reinforcement network induces significant strain localization within the matrix, which is the primary source of the material’s work hardening and also indicates potential sites for damage initiation. The mechanisms of load competition and synergy between the dual-phase reinforcements revealed in this study can provide a reference for the microstructure design and performance modulation of high-performance metal matrix composites co-reinforced with graphene and TiC particles.</p>

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Numerical investigation on deformation behavior of TiC–graphene hybrid-reinforced aluminum matrix composites

  • 期刊论文

  • 发表日期：

    2026年1月9日

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  • Lei Xu,
  • Jiankai Yao,
  • Yasong Wang,
  • Changyun Li,
  • Xiaolong Li,
  • Erkuo Yang

摘要

A fundamental understanding of the load transfer and distribution mechanisms between the reinforcement and the matrix is a prerequisite for elucidating the synergistic strengthening effect among hybrid reinforcements. In this study, a three-dimensional finite element model was constructed to simulate the plastic deformation mechanism of an aluminum matrix composite synergistically reinforced with TiC particles and graphene nanoplatelets. The investigation focuses on the influence of the volume fraction and aspect ratio of graphene on the mechanical behavior of the material. The results indicate that graphene, as the primary load-bearing phase, exhibits an enhanced strengthening effect with increasing volume fraction and aspect ratio. The graphene network creates a stress-shielding effect on the TiC particles, revealing a competitive load-bearing relationship between the two reinforcement phases. Furthermore, the presence of the reinforcement network induces significant strain localization within the matrix, which is the primary source of the material’s work hardening and also indicates potential sites for damage initiation. The mechanisms of load competition and synergy between the dual-phase reinforcements revealed in this study can provide a reference for the microstructure design and performance modulation of high-performance metal matrix composites co-reinforced with graphene and TiC particles.