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stiffness

Posted 12 mars 2010, 09:48 UTC−5 2 Replies

Alex Zinchenko
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Hi all,

does anybody know how to calculate the stiffness of a sample in comsol?

plese help me,
Alex
2 Replies Last Post 15 mars 2010, 07:03 UTC−4
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago 12 mars 2010, 15:06 UTC−5
Hi Alex

is it the mechanical stifness in [N/m] you are looking for ?

I would take then a stationary sover on the structural mode on your model, load a face with 1 or 1000[N], or a pressureof p[Pa]=F[N]/(Area[m^2]), solve, calculate the average displacement by integrating disp_sm...[m] and dividing by the area and then calculate k[N/m]=F[N]*Area[m^2]/(int(disp_sm...)[m*m^2])

Or is it another varaible you are looking for ?

Good luck
Ivar
Hi Alex is it the mechanical stifness in [N/m] you are looking for ? I would take then a stationary sover on the structural mode on your model, load a face with 1 or 1000[N], or a pressureof p[Pa]=F[N]/(Area[m^2]), solve, calculate the average displacement by integrating disp_sm...[m] and dividing by the area and then calculate k[N/m]=F[N]*Area[m^2]/(int(disp_sm...)[m*m^2]) Or is it another varaible you are looking for ? Good luck Ivar
Alex Zinchenko
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Posted: 1 decade ago 15 mars 2010, 07:03 UTC−4
Hi Ivar,

Yes it is what I'm looking for..

before I used prescribed dislacement and calculated reaction force...
but I don't sure that my way of stiffness calculating is correct.
I will try your's.

Thank you,
Alex
Hi Ivar, Yes it is what I'm looking for.. before I used prescribed dislacement and calculated reaction force... but I don't sure that my way of stiffness calculating is correct. I will try your's. Thank you, Alex

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