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Radial and tangential thrermal stress

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Hello,

I am trying to simulate the thermal stresses caused by Joule heating in a membrane.
I see that the membrane expands and I see von Mises stresses which make sense. But when I get stress components in Cartesian coordinate system (stress tensors), I get minus stresses in x and y directions which does not make sense if the membrane deflects.
I also am a bit confused how to get the radial and tangential stresses. I defined a cylindrical coordinate system and chose it for the thermal linear elastic material and solved the model but am not sure what I should plot now to see the correct values for the Radial and tangential stresses.
I have attached the model.

Thanks in advance for help


0 Replies Last Post 10 juil. 2015, 05:53 UTC−4
COMSOL Moderator

Hello Zahra Khaji

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