Glass-filled PTFE

[Jorgen]

Experimental data for PTFE filled with 15 vol% glass fiber. The following experimental data is available: uniaxial tension, uniaxial compression, small punch, stress relaxation, and triaxial compression.

[mbrumels]

Thanks for the great forum.

I am looking at the 15% glass filled PTFE data. Why are the stress and strain both negative for the tension_cyclic.txt file? This makes sense for the compression_cyclic but not the tension.

Another question, is there a particular material model that you recommend to use with this data? I use Abaqus. From a quick glance, it appears that a linear elastic material model with plasticity defined would model it well using the data for the "correct" rate.

I have attached a spreadsheet with most of the data graphed.

[Jorgen]

I think you discovered an error in the original experimental data set.

Using a metal plasticity model is an easy way to "get started". I personally would use the Three Network Model (http://www.veryst.com/thermoplasticlibrary.html) for this data set. I will add more info about the TNM on this web site as soon as I have the time...

-Jorgen

[tanmoy.db]

I agree with mbrumels, the data set for compression and tension are identical. It would be a mojor help with you could post the corrected data set for uniaxial tension.

Thank You.