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thermal strain issue

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Dear Sir,

I've an urgent question about thermal strain simulation. Comsol simulates the thermal strain for two contact plates separately. I was wondering how to make the strain distribution continuous.

Please see the attached file and give me some suggestions. I'd really appreciate your help.

Regards,
Elva


1 Reply Last Post 17 lug 2012, 02:17 GMT-4
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)

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Posted: 1 decade ago 17 lug 2012, 02:17 GMT-4
Hi

indeed you open an interesting question there ;)

You can also take a look at the Model Library - Structral - Thermal Structure Interactions - Layered Plate

If you add a boundary mesh layer on the internal interfaces you will also get steeper steps of the stress and strain

Question: are the steps in stress and strain physical or not ?
or should the strain be "smooth" across the boundaries ?

My first reaction is COMSOL is correct, but it doesn feel very intuitive and need some more thinking

Perhaps you get more convinced if you run a TS physics study on your model and increase the temperature gradually

--
Good luck
Ivar
Hi indeed you open an interesting question there ;) You can also take a look at the Model Library - Structral - Thermal Structure Interactions - Layered Plate If you add a boundary mesh layer on the internal interfaces you will also get steeper steps of the stress and strain Question: are the steps in stress and strain physical or not ? or should the strain be "smooth" across the boundaries ? My first reaction is COMSOL is correct, but it doesn feel very intuitive and need some more thinking Perhaps you get more convinced if you run a TS physics study on your model and increase the temperature gradually -- Good luck Ivar

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