Explicit multi-scale modelling of intrinsic self-healing after low-velocity impact in GFRP composites

Smojver, Ivica; Dominik, Brezetić; Ivančević, Darko

doi:10.1016/j.compstruct.2022.116213

Cited by 4 publications

(2 citation statements)

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“…A novel multiscale material model is proposed that takes into account the damage and healing procedures that occur in the matrix material of the composite microstructure. In contrast to the existing mean field multiscale methods in the CDHM framework [25,26] for fiber reinforced plastic where the healing takes place in an uncoupled healing mechanism and the strain localization uses the Voigt and Reuss iso-strain and iso-stress approximation, the proposed methodology is based on the Eshelby's solution. Eshelby's solution incorporates strain concentration tensors and tends to produce more accurate results for the strain increment dehomogenization for matrix and fiber strain increment.…”

Section: Discussionmentioning

confidence: 99%

“…The healing is incorporated into the suggested model in a coupled healing mechanism. The mean-field methods have been successfully applied in the CDM framework before [25,26] but to the authors' knowledge, there is no published work that incorporates a multiscale modeling procedure based on the Eshelby's theory for strain localization and applied in a coupled healing mechanism.…”

Section: Introductionmentioning

confidence: 99%

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Multiscale modeling of extrinsic self healing GFRP materials

Tsivolas

Gergidis

Paipetis

2022

Modelling Simul. Mater. Sci. Eng.

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In this study, a novel multiscale material model is proposed to simulate the elasto-plastic damage-healing behavior of an epoxy matrix in a composite material. This framework combines the non-linear mean field homogenization methodologies with the continuum damage-healing mechanics (CDHM) to achieve the healing process in a coupled manner along with the damage. The model is able to predict the time dependent healing effect combined with damage propagation.In the proposed multiscale model, the healing depends on the current damage of the matrix, the available time that the healing can evolve and the rate of healing. A parametric study with respect to the rate of healing and a time dependency analysis were performed to examine the sensitivity of the model. In addition, a microscale method to calculate the healing initiation and healing efficiency is proposed using a representative volume element (RVE) of an epoxy matrix with healing microcapsules. The microscale simulation showed that with 7.5 % volume fraction of microcapsules 40 % of the structural integrity can be recovered.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%