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Residual Stress for Eigenfreq?
Posted Dec 4, 2009, 8:52 p.m. EST 1 Reply
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Hi Everyone,
I'm trying to solve a problem here with computing the eigenfrequencies of a body under compressive and thermal stresses.
My object is very thin, about 1mm, so I have to use the Shell Module, but there are no options for initial stress, etc. If I try this in the Solid Stress module, I am faced with some severe mesh problems because the object is so thin.
Can anyone offer a potential solution here?
Thanks.
I'm trying to solve a problem here with computing the eigenfrequencies of a body under compressive and thermal stresses.
My object is very thin, about 1mm, so I have to use the Shell Module, but there are no options for initial stress, etc. If I try this in the Solid Stress module, I am faced with some severe mesh problems because the object is so thin.
Can anyone offer a potential solution here?
Thanks.
1 Reply Last Post Dec 7, 2009, 3:10 a.m. EST
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Posted:
1 decade ago
if no option for residual stress available , you must add your inital thermal stress by modyfing the weak form
physic>subdomain setting equation. To do it , you can have a look how it is implemented in the solid stress module and transpose the concept in the shell module.I have already implemented this type of analysis for compressive and thermal stress for the quartz resonator :my procedure was to first run a static analysis and then use the static solution as linearisation point for the eigen analysis.If you want me to help to implement this,send me your file in my personal e-mail (thibault.louvet-carron@temex.fr)either or in this blog.
physic>subdomain setting equation. To do it , you can have a look how it is implemented in the solid stress module and transpose the concept in the shell module.I have already implemented this type of analysis for compressive and thermal stress for the quartz resonator :my procedure was to first run a static analysis and then use the static solution as linearisation point for the eigen analysis.If you want me to help to implement this,send me your file in my personal e-mail (thibault.louvet-carron@temex.fr)either or in this blog.