I am modelling a Hybrid layered structure consisting two different materials. I have available the loss factor of both materials by the Experiments. How can I associate these loss factors to the material in the abaqus ??
hi
i think you want rayleigh coefficients damping
did you mean that?
Hi Pouya
If I got your mean well, you can define that in the material properties Module.
Go there and under density option you can find it easily.
by inserting some dada to Alpha and Bita you can determine the damping coefficient.
feel free to contact me if your question still persists.
hope, I can help you.
Best Regards
Dear Pouya Haghdoust,
Please, see the attached file. I hope that it will be useful to you.
Best Regards
Waleed
Dear Pouya Haghdoust
There are two type of damping. viscous damping and structural damping. Viscous damping is frequency dependent and is defined by resistance to motion by a force Cut where ut = du/dt the speed of motion. Structural damping is accounted for by introducing a complex stiffness defined by K* = K(1 +2βi) where i = √(-1) and β = the loss factor. In Abaqus viscous damping is utilized.
The viscous damping coefficient "C" equivalent to the structural damping loss factor "β" is derivable from c = βMωn2/ω where ωn is a natural frequency of the structure and ω is the forced vibration frequency. You can now solve your problem.
I hope you find this answer useful.
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