Percolation Modeling of Conductance of Self-Healing Composites

Three-Dimensional Percolation Modeling of Self-Healing Composites

We study the self-healing process of materials with embedded "glue"-carrying cells, in the regime of the onset of the initial fatigue. Three-dimensional numerical simulations within the percolation-model approach are reported. The main numerical challenge taken up in the present work, has been to extend the calculation of the conductance to three-dimensional lattices. Our results confirm the general features of the process: The onset of the material fatigue is delayed, by developing a plateau-like time-dependence of the material quality. We demonstrate that in this low-damage regime, the chang…

Percolation Modeling of Self-Damaging of Composite Materials

We propose the concept of autonomous self-damaging in "smart" composite materials, controlled by activation of added nanosize "damaging" capsules. Percolation-type modeling approach earlier applied to the related concept of self-healing materials, is used to investigate the behavior of the initial material's fatigue. We aim at achieving a relatively sharp drop in the material's integrity after some initial limited fatigue develops in the course of the sample's usage. Our theoretical study considers a two-dimensional lattice model and involves Monte Carlo simulations of the connectivity and con…

Solution of the tunneling-percolation problem in the nanocomposite regime

We noted that the tunneling-percolation framework is quite well understood at the extreme cases of percolation-like and hopping-like behaviors but that the intermediate regime has not been previously discussed, in spite of its relevance to the intensively studied electrical properties of nanocomposites. Following that we study here the conductivity of dispersions of particle fillers inside an insulating matrix by taking into account explicitly the filler particle shapes and the inter-particle electron tunneling process. We show that the main features of the filler dependencies of the nanocompo…

环状DNA与葡聚糖的酶驱动复合材料的协同流变状态切换

Cooperative rheological state-switching of enzymatically-driven composites of circular DNA and dextran

本研究通过酶促消化将环状DNA与葡聚糖复合材料推至非平衡态，发现离散的流变状态切换现象，并利用S型双态函数建模揭示了协同渗滤机制，为伤口愈合和自修复材料提供了新平台。