Coupled Thermal - Structural

[Muzialis]

Hi All,

I am having a go at a coupled thermal structural analysis of a bonded metal/ rubber part with ANSYS.
To start with I used isotropic thermal conductivity and everything was fine until somebody popped over with some test results according to which conductivity is very strain dependant (due to polymer chain orientation, I am told).

It looks like some APDL code is to be written, in which I am almost a beginner.
Does anybody has experience in similar problems?

Thank you so much

Muzialis

[Jorgen]

Hi Muzialis,

Are you saying that the thermal conductivity of the rubber was strongly dependent on the deformations state? I am curious: What type of rubber was it? What type and magnitude of strain was applied?

I am afraid that I do not know much about APDL.

- Jorgen

[Muzialis]

Hi Jorgen,

hope you are4 very fine.
The rubber under consideration is a NR/SBR formulation,very weakly crosslinked.

The conductivity almost doubles in the priincipal strain direction every 20% strain increment , the solution I obtained considering it isotropic is in the region of 120% but it looks undersestimated.
Probably it would be sufficient to write some code capable of changing conductivity data at each iteration of the non linear solution.

I might be getting there after going painfully through the manuals, still the opinion of a more experienced FE user would be the most welcome.

Thank you very much.

Best Regards

Muzialis

Marco