Henrik Sönnerlind
COMSOL Employee
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Posted:
8 months ago
01.08.2024, 10:47 GMT-4
Updated:
8 months ago
01.08.2024, 10:49 GMT-4
I think the problem is that the singularity at the two ends of the fixed constraint causes extreme strains, and a very high biaxiality ratio. This throws the hyperelastic models out of the stability region. If you make a finer mesh there, the failure will come earlier, since the singular strains are then resolved into even higher values.
You may need a more realistic boundary condition.
You cannot use a moving mesh in a domain controlled by Solid Mechanics. Moving mesh would typically be used in a fluid domain which is deformed by an adjacent solid.
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Henrik Sönnerlind
COMSOL
I think the problem is that the singularity at the two ends of the fixed constraint causes extreme strains, and a very high biaxiality ratio. This throws the hyperelastic models out of the stability region. If you make a finer mesh there, the failure will come earlier, since the singular strains are then resolved into even higher values.
You may need a more realistic boundary condition.
You cannot use a moving mesh in a domain controlled by Solid Mechanics. Moving mesh would typically be used in a fluid domain which is deformed by an adjacent solid.
Please login with a confirmed email address before reporting spam
Posted:
8 months ago
08.08.2024, 03:56 GMT-4
Updated:
8 months ago
08.08.2024, 04:01 GMT-4
Dear Mr. Henrik,
Thank you so much for answering my query. I have tried to keep the ecoflex between the two SS plate the bottom one fixed and top to apply load to avoid the singularity earlier.
I have followed the hyperelastic seal tutorial (properties of the material as well) to provide better boundry conditions. however i am still unable to run the simulation. i am attaching the file for reference as well.
Dear Mr. Henrik,
Thank you so much for answering my query. I have tried to keep the ecoflex between the two SS plate the bottom one fixed and top to apply load to avoid the singularity earlier.
I have followed the hyperelastic seal tutorial (properties of the material as well) to provide better boundry conditions. however i am still unable to run the simulation. i am attaching the file for reference as well.