thin layer on substrate

[Koruin]

Hello!

I have to model a thin layer (metal film) on substrate (Polyimid). And simulate a tensile test. The substrate and the film have different thickness. The substrate has a 125 micron thickness.
The second layer is a 80 nanometer thick metal film.
The structure is 6mm wide, and 20mm long.
There is a big difference in the dimesions. ANSYS have only 32000 Elements, and i can not mesh all with 3d-solid elements.
Please give me a tipp, which elements i could use...and how i could start the model building.

Regards,
Koruin
Student in "Mechanical Engineering"
Universität Stuttgart

 

[TucsonAz]

Try to use symmentry to simplfly the model. Ansys is more stable for meshing thin layers also. You can also try to mesh finer in the thin layer and do a course mesh for the larger substrate you have.