Multi-factor analysis of the effects of graphene oxide nanoplatelets on self-healing polymer composites based on micromechanical FE simulation

Gao, Chongyang; Cheng, Shucan; Yang, Chenlong; Ye, Yuqi; Lv, Kefan

doi:10.1016/j.commatsci.2022.111980

Cited by 6 publications

(2 citation statements)

References 33 publications

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“…On the contrary, if the microcapsule strength is much smaller than the matrix, the role of microcapsules in the matrix is closer to the void, in which case the higher the microcapsule content, the lower the mechanical strength of the self-healing composite. The experimental conclusions of Gao [6] also demonstrate that the effect of the microcapsule volume fraction on the compressive strength of self-healing composites is not monotonically negatively correlated. Our findings seem to provide a more comprehensive explanation of the The volume fraction of microcapsule in PRSC (%) 1st main crack formation complete rupture of microcapsule resin-based rupture effect of microcapsule volume fraction on the macro-mechanical properties of self-healing composites.…”

Section: Fig 15 Damage Stress Of the Msementioning

confidence: 92%

“…Xu [5] constructed a composites' multiscale finite element model to study the influence of the shape, size, and distribution pattern of the reinforcing medium on the mechanical strength of the composites. Gao [6] built a two-phase RVE model between the microcapsules and the reinforcing matrix based on the extended finite element method (XFEM) and investigated the competitive damage mechanism of matrix damage and interface debonding. Their results indicated that the interfacial fracture energy is the key parameter affecting the debonding sequence of the matrix and the interface.…”

Section: Introductionmentioning

confidence: 99%

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WITHDRAWN: Cross-scale modeling of Microencapsulated self-healing composite with multiphase medium and their damage competition behavior

Yin,

Li,

Huang

2024

Preprint

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Constructing a high-fidelity cross-scale numerical model is the primary challenge in the multiscale analysis of multiphase medium composites. Considering the limitations of the Finite Element Method (FEM) in the study of the dynamic damage problem of non-homogeneous and discontinuous materials, the Discrete Element Method (DEM) is used in this study to build a three-medium multiscale numerical model containing aggregates, matrix, and microcapsules. Further, the dynamic damage problem of microcapsules embedded in self-healing composites and the damage competition issues between the microcapsules and the matrix are investigated. The results indicate that (1) The damage evolution process, the location of maximum damage, and the final damage pattern of microcapsule embedded in the matrix and exposed to the ideal environment differed considerably. (2) The effect of microcapsule volume fraction on the mechanical strength of the matrix in self-healing composites is not linearly negatively correlated, but instead, there is a non-linear relationship, which is highly dependent on the strength ratio of the microcapsule to the matrix. (3) In self-healing composites, damage competition between the microcapsules and the matrix has a decisive influence on triggering the self-healing mechanism. (4) To obtain a better self-healing effect, the microcapsule volume fraction in the self-healing composites should not exceed 1.5%, and the mechanical strength pre-maintenance should not be more than 95% of the failure strength. The multiphase medium & multiscale analysis method proposed in this study also provides a new approach for visualizing the progressive dynamic damage problem in self-healing composites.

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Section: Fig 15 Damage Stress Of the Msementioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%