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Material properties

Posted Apr 24, 2012, 12:38 a.m. EDT Version 4.1, Version 4.2 1 Reply

Nguyên Vinh
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Hello !

I have a question.

if I put pressure on the model, do material properties change ? as the elasticity. why does frequency change

Can someone help me ?
1 Reply Last Post Apr 24, 2012, 2:48 p.m. EDT
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago Apr 24, 2012, 2:48 p.m. EDT
Hi

that depends what you are modelling, you might be in "solid" then you can get stress stiffening, in certain cases, but for that you need to combine a stationary stres analysis and use that as the starting point for an eigenfrequency analysis

But yu can also have a pressure dependent material that depends on the material you are using and the physics you have selected

--
Good luck
Ivar
Hi that depends what you are modelling, you might be in "solid" then you can get stress stiffening, in certain cases, but for that you need to combine a stationary stres analysis and use that as the starting point for an eigenfrequency analysis But yu can also have a pressure dependent material that depends on the material you are using and the physics you have selected -- Good luck Ivar

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