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Stress Error!
Posted Dec 21, 2015, 3:57 a.m. EST Version 5.0 2 Replies
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Hello Sir,
I am working on energy harvesting. it's multilayer beam. when I apply load on edge... I can't find the stress on upper layer... iT's shown under the upper layer. Would you please tell me why this is happening?
I am working on energy harvesting. it's multilayer beam. when I apply load on edge... I can't find the stress on upper layer... iT's shown under the upper layer. Would you please tell me why this is happening?
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2 Replies Last Post Dec 23, 2015, 10:23 a.m. EST
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Posted:
9 years ago
Hi
It is not easy to understand what is really wrong, as it can be many things. COMSOL is rather complex, so it's easy to make errors, particularly in the beginning.
But it looks like your mesh is not fine enough, normally those shapes in the thickness tends to form for a too rough mesh, but as you have a multilayer beam (?), perhaps the continuity between the layers could also not be correctly set up. In union geometry mode, continuity is the by default setting, but i.e. not in assembly mode, if you happen to have selected that.
--
Good luck
Ivar
It is not easy to understand what is really wrong, as it can be many things. COMSOL is rather complex, so it's easy to make errors, particularly in the beginning.
But it looks like your mesh is not fine enough, normally those shapes in the thickness tends to form for a too rough mesh, but as you have a multilayer beam (?), perhaps the continuity between the layers could also not be correctly set up. In union geometry mode, continuity is the by default setting, but i.e. not in assembly mode, if you happen to have selected that.
--
Good luck
Ivar
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Posted:
9 years ago
I agree with Ivar, it looks there is a mesh issue that you have to resolve first. For a beam like that I would use a mapped mesh where you can control the number of elements through the beam thickness independently from the element size in the plane of the beam/plate.
Nagi Elabbasi
Veryst Engineering
Nagi Elabbasi
Veryst Engineering