Electrical Treeing Propagation in Nanocomposites and the Role of Nanofillers: Simulationwith the Aid of Cellular Automata

Pitsa, Despoina; Vardakis, G. E.; Danikas, M. G.; Kozako, Masahiro

doi:10.2478/v10187-010-0018-3

Cited by 9 publications

(5 citation statements)

References 14 publications

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“…With high nanoparticle percentage, about 50% of the total volume will be affected and one may assume that it is possible that also the shell layer interfaces will overlap. This point is somehow shown, albeit with all reservations of the simulation parameters, in [47][48][49], where treeing paths penetrate through the polymer. In the aforementioned publications, the tree propagation is shown in a nanocomposite with well defined nanoparticles and a space charge density of 40 C/m 3 .…”

Section: Wwwetasrcom Danikas Et Al: a Review Of Two Nanocomposite Ins...mentioning

confidence: 94%

“…they do not take into account all possible involved parameters, it is undeniable that they -at least -partially simulate realistic conditions. Also in [49], it was indicated that in absence and/or in presence of homocharges/heterocharges, nanoparticles act as elementary barriers to the propagation of electrical trees. Moreover, simulations with homocharge presence show that the tree propagation stops at a certain stage.…”

Section: Tanaka's Nanocomposite Modelmentioning

confidence: 99%

“…their respective thicknesses and their possibility of interpretation of various phenomena, they both refer to layers surrounding a nanoparticle and they both explain why with the addition of nanoparticles there is a marked improvement in the properties of conventional polymers. Recent simulation results [47][48][49] indicate that electrical treeing goes through the polymer matrix, avoiding thus the nanoparticles. This is an indication of validity of both models but not yet a proof.…”

Section: Wwwetasrcom Danikas Et Al: a Review Of Two Nanocomposite Ins...mentioning

confidence: 99%

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A Review of Two Nanocomposite Insulating Materials Models: Lewis’ Contribution in the Development of the Models, their Differences, their Similarities and Future Challenges

Danikas

Bairaktari

Sarathi

et al. 2014

Eng. Technol. Appl. Sci. Res.

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Nanocomposite polymers are nowadays a major field of research. This paper investigates the interpretational possibilities of two models developed, namely, Tsagaropoulos’ model and Tanaka’s model. Particular emphasis is given to Lewis’ model, which was the first one to be proposed and whose contribution to the aforementioned models was significant. The two models were developed separately and independently from each other. They both consider various layers around the nanoparticles. They both consider well bonded and more loosen layers. Similarities and differences between the two models are pointed out and discussed as well as possibilities for further research in order to shed light on some aspects of electrical phenomena in these materials. Particular emphasis is given to the interfaces between the nanoparticles and the surrounding base material. Comments are offered regarding the challenges facing the two models w.r.t. the interpretation of discharges on nanocomposite surfaces. Possible new areas of research are suggested and new challenges for the aforementioned models are pointed out.

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Section: Wwwetasrcom Danikas Et Al: a Review Of Two Nanocomposite Ins...mentioning

confidence: 94%

Section: Tanaka's Nanocomposite Modelmentioning

confidence: 99%

Section: Wwwetasrcom Danikas Et Al: a Review Of Two Nanocomposite Ins...mentioning

confidence: 99%

See 1 more Smart Citation

A Review of Two Nanocomposite Insulating Materials Models: Lewis’ Contribution in the Development of the Models, their Differences, their Similarities and Future Challenges

Danikas

Bairaktari

Sarathi

et al. 2014

Eng. Technol. Appl. Sci. Res.

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“…In [ 46 ], the tree propagation was studied in a polymeric material, polymethylmethacrylate, containing a conductive spherical particle, modelled as a region that has infinite permittivity, under applied DC voltage conditions. In [ 47 ], this model was used to study the influence of nanoparticles (NPs) on the propagation of electrical trees. Dielectric NPs are simulated as 100 × 100 nm rectangles, with a permittivity of twice the value corresponding to the base dielectric.…”

Section: Brief Review Of Current Models For Simulating the Propagamentioning

confidence: 99%

An Improved Physical-Stochastic Model for Simulating Electrical Tree Propagation in Solid Polymeric Dielectrics

2020

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The dielectric breakdown of solid polymeric materials is due to the inception and propagation of electrical trees inside them. The remaining useful life of the solid dielectrics could be determined using propagation simulations correlated with non-intrusive measurements such as partial discharges (PD). This paper presents a brief review of the different models for simulating electrical tree propagation in solid dielectrics. A novel improved physical-stochastic model is proposed, which allows quantitatively and qualitatively analyzing the electrical tree propagation process in polymeric dielectrics. Simulation results exhibit good agreement with measurements presented in the literature. It is concluded that the model allows adequately predicting the tree propagation behavior and additional experimental analyses are required in order to improve the model accuracy.

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“…Similar to the mechanical toughening mechanism of composite materials, plenty of research has been carried out by using fillers to inhibit electrical treeing [40][41][42][43][44][45][46][47][48]. Various properties of these fillers can be modified, and the electrical treeing process can be altered.…”

Section: Introductionmentioning

confidence: 99%

Electrical treeing: A phase-field model

Cai

Wang

et al. 2019

Extreme Mechanics Letters

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Electrical treeing is a commonly observed phenomenon associated with dielectric breakdown in solid dielectrics. In this work, a phase-field model is developed to study the initiation and propagation of electrical trees in two different geometries: a parallel capacitor and a cylindrical capacitor. The model utilizes a continuous field of damage variable to distinguish the localized damaged regions from the undamaged bulk material. Factors that affect electrical tree morphology, including discharge speed and damage mobility, are studied. Electrical treeing tends to exhibit a fractal shape with more branches at a relatively high discharge speed relative to the rate of damage. Furthermore, the effect of fillers on electrical treeing is also studied. Numerical results 2 suggest that fillers of lower permittivity, higher breakdown energy or lower damage mobility will promote fractal treeing and thus resist catastrophic breakdown.

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Electrical Treeing Propagation in Nanocomposites and the Role of Nanofillers: Simulationwith the Aid of Cellular Automata

Cited by 9 publications

References 14 publications

A Review of Two Nanocomposite Insulating Materials Models: Lewis’ Contribution in the Development of the Models, their Differences, their Similarities and Future Challenges

A Review of Two Nanocomposite Insulating Materials Models: Lewis’ Contribution in the Development of the Models, their Differences, their Similarities and Future Challenges

An Improved Physical-Stochastic Model for Simulating Electrical Tree Propagation in Solid Polymeric Dielectrics

Electrical treeing: A phase-field model

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