Hi Everyone,
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For my project, I need to model the viscoelastic properties (i.e. Storage and Loss Modulus. ) of my nanocomposite as a function of temperature; I have performed a DMA test in the plain epoxy sample, I obtained the Storage and Loss Modulus as a function of temperature, the frequency was kept 1hz.Â
For this, I need the Prony Series, is it possible to calibrate with the temperature domain?Â
In the picture below I tried to calibrate with some frequency values (not real) to see the prony series but even with this the calibration does not succeed.Â
Regards
Sebastian Tamayo-Vegas
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Hello Sebastian: If all you have is E'(temp) and E''(temp), then you unfortunately don't have enough info to find the Prony series. You need a some more info about how E' and E'' depend on the frequency.
If you like, I can help you with your test calibration of the Prony series with (not real) data. Just send attach the mcal-file to another message, and I'll take a look.
/Jorgen
Hi Jorgen,
Thank you for your reply.
My experimental data also contains the following: Time, Temperature, Storage, Loss, Stress, Tan, Frequency(constant), Drive, Amplitude, Strain, Displacement, Static, Position, Length, Force, Stifness. Â
The DMA file is attached.
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Is it still not enough to obtain the Prony Series?
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Also, please find attached the M Calibration file
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Regards
Sebastian
Hello Sebastian, I started to look at your files and I noticed that your experimental storage modulus is decreasing A LOT with increasing frequency. That does not make sense. The storage modulus should increase with frequency. Can you check you experimental data again?
/Jorgen