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Old   May 28, 2010, 07:18
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Alex Zinchenko
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Hi all

I previosly worked with Comsol program but I didn't solve my problem..

I need to simulate compression test in a finite sample of 3d periodic structure.

problem is that one unit cell has 5000 mesh elements and I need approximatly 1000*1000*1000 unit cells (this for nanotechnology purpuses) It causes to crash due to out of memory error..

Another way I went was using periodic boundary conditions and I succeded in unlimited case(infinite layer) but nevertheless in life I have finite sample(~1000*1000*1000) with free constrains on the edges. Therefore I have big losses in poissons expand of whole sample.

The question is can Ansys solve my problem or not?

thx in advance,
Alex
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Old   May 31, 2010, 22:14
Default 5,000,000,000,000?
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Simon Pereira
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Are you saying you want to generate a model with 5 trillion cells?

No, no software on the planet can handle that.

We have done Billion cell models, even close to 2 Billion if you have the hardware (coincedentally, the hardware to run it costs about a billion dollars. )

You need to reduce your model some how...

There are lots of ways including sub-modeling, symmetry, etc.
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