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how to define initial stress in a thin film

Posted 7 nov 2011, 16:10 GMT-5 Structural Mechanics Version 4.2 2 Replies

Rong Sun
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Hi,

I would like to simulate a pre-stressed thin film on a substrate to see the bowing of the substrate. The substrate is considered stress free. The thin film has compressive stress. I would like to get some help on how to define such initial stress in COMSOL.

My COMSOL is 4.2.

Thanks a bunch in advance,

Rong
2 Replies Last Post 8 nov 2011, 08:42 GMT-5
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago 8 nov 2011, 01:53 GMT-5
Hi

the way I use is via thermal differential contraction, there is a nice example in the model library. I do not really know how to correctly define the stress tensor without letting COMSOL solve a realistic manufacturing case

But someone out there might have a good/better idea ;)

--
Good luck
Ivar
Hi the way I use is via thermal differential contraction, there is a nice example in the model library. I do not really know how to correctly define the stress tensor without letting COMSOL solve a realistic manufacturing case But someone out there might have a good/better idea ;) -- Good luck Ivar
Rong Sun
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Posted: 1 decade ago 8 nov 2011, 08:42 GMT-5
Thank you Ivar! I will try as you suggested.

Thanks again,

Rong
Thank you Ivar! I will try as you suggested. Thanks again, Rong

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