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epoxy silica nano-composite material simulation

Posted Apr 25, 2011, 4:50 a.m. EDT Low-Frequency Electromagnetics Version 4.0a 2 Replies

Shwetha D J
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I am doing a project on simulation of electrical properties of epoxy-silica nano-composite material. The electrical properties include resistivity, loss tangent, relative permittivity, voltage and thermal breakdown, with the variation in concentration of silica fillers. The boundary conditions applied are similar to parallel plate capacitor i.e., upper surface is given an ac voltage, lower surface is grounded and the side boundaries are given periodic conditions.

After composing the domains of randomly placed silica nano-fillers in the epoxy matrix i am not able to find the relative permittivity of the whole composite material with change in both voltage and frequency.

I am able to attach only one reference paper.

But I am unable to attach the models that i have worked so far.

Thank you.:)

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2 Replies Last Post Mar 2, 2014, 3:28 p.m. EST
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Hello Shwetha D J

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Basil Roy
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Posted: 1 decade ago Jun 24, 2013, 2:53 a.m. EDT

After composing the domains of randomly placed silica nano-fillers in the epoxy matrix i am not able to find the relative permittivity of the whole composite material with change in both voltage and frequency.



So i figure you successfully modeled it. Its not clear where you encountered problem. From reading your reference paper i think you have to plot the variation of Net Electric field inside the matrix and thus find the max and min value of E.

Using these values and fraction of loading, you can find the effective permittivity using any of effective medium theory equations, Bruggeman for instance.

Drop a reply if you have any doubts..
[QUOTE] After composing the domains of randomly placed silica nano-fillers in the epoxy matrix i am not able to find the relative permittivity of the whole composite material with change in both voltage and frequency. [/QUOTE] So i figure you successfully modeled it. Its not clear where you encountered problem. From reading your reference paper i think you have to plot the variation of Net Electric field inside the matrix and thus find the max and min value of E. Using these values and fraction of loading, you can find the effective permittivity using any of effective medium theory equations, Bruggeman for instance. Drop a reply if you have any doubts..
Venkatesh Doddapaneni
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Posted: 1 decade ago Mar 2, 2014, 3:28 p.m. EST
Hi, I am interested to know how you managed to fix your problem!!
Have you succeeded?

Looking forward for your reply
Hi, I am interested to know how you managed to fix your problem!! Have you succeeded? Looking forward for your reply

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