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Large Deformation /NonLinearity in Piezoelectric Physics
Posted May 11, 2010, 1:53 p.m. EDT 1 Reply
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Hi,
I'm modeling a relatively thin piezoelectric actuator. I expect that the deflections wil be about 25% to 75% of the actuator thickness and thus am expecting geometric stress stiffening or large deformation stiffening
How to I "turn on" large deformations for Piezoelectric problems?
thanks for the help!
I'm modeling a relatively thin piezoelectric actuator. I expect that the deflections wil be about 25% to 75% of the actuator thickness and thus am expecting geometric stress stiffening or large deformation stiffening
How to I "turn on" large deformations for Piezoelectric problems?
thanks for the help!
1 Reply Last Post May 12, 2010, 4:46 p.m. EDT
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Posted:
1 decade ago
Hi
normally you have the large deformation as part of the "physics - properties" list, but I cannot remember just now if there are not some special restrictions for PZT, you must look up carefully the doc.
You have PZT in the structural and in the MEMS modules, I beleive they are identical.
If you really want to know the differences COMSOL applies you must compare the variables of "physics - equation systems - subdomain/boundary/point settings", when you flip the "large deformation" on and off.
Good luck
Ivar
normally you have the large deformation as part of the "physics - properties" list, but I cannot remember just now if there are not some special restrictions for PZT, you must look up carefully the doc.
You have PZT in the structural and in the MEMS modules, I beleive they are identical.
If you really want to know the differences COMSOL applies you must compare the variables of "physics - equation systems - subdomain/boundary/point settings", when you flip the "large deformation" on and off.
Good luck
Ivar