Analytical model for closed-cell structure (tetrakaidecahedral)

[zunaida]

Dear all,

Here I got problem... i dont know what the exact analytical model suitable used for closed-cell structure exspecially for tetrakaidecahedral. So i would like to know the exact model beside Voronoi's model. This is very important cause i want to compare my result between, experimental, analytical and modelling... hopefully has someone can answer my question... thank you

[Jorgen]

As you probably know, there have been a number of interesting models developed for closed-cell foam. Some of these are based on various types of polyhydra.

Best of luck,
Jorgen

[zunaida]

Dear jorgen....

actually i would like to know what the model i should use for closed-cell foam which using Kelvin@ tetrakaidecahedron cell...do you have any suggestion?

[Jorgen]

Oh my, that is a specific question. Have you done a literature search on the topic?

On top of my head, I recall some very nice work on representative unit cell analyses of foams a few years ago. I believe it came from a reseach group in England, and it was published in Journal of Mechanics of Physics of Solids.

-Jorgen

[zunaida]

Dear jorgen

Actually I have done the literature review... one of the model is Voronoi's model... but i would like to know the others model... ist very difficult to find the model for closed-cell structure while use the tetrakaidecahedral cell. Most of the closed-cell model using spheres, elliptical, and generelized self-consistent method (GSCM)...

Thank for your suggestion..i will try find that journal...anyways..thankss

[saeed]

Dear zunaida,

If you got the solution of your problem than kindly share it on this forum, as I m going through the same stage.

Regards

Saeed

[nsk37]

Read this article for modelling tetrakaidecahedral foams:
Finite element analysis of closed-cell aluminium foam under quasi-static loading
Materials & Design, Volume 31, Issue 2, February 2010, Pages 712-722
S.K. Nammi, P. Myler, G. Edwards
Abstract:
Closed-cell aluminium foam was represented with a new type of repeating unit-cell (RUC) constructed from the tetrakaidecahedra structure. After that the thin shell geometrical parameters and material properties of aluminium foam were assigned to this unit-cell. Finite element studies were then conducted to evaluate the stiffness and mechanical response of this model under large strain. Our results are compared to cruciform-pyramidal and cubic-spherical unit-cell foam models that describe the load and global deformation response in-terms of unit-cell structure. We demonstrate that the plateau phase stress–strain characteristics of our model are more representative of real aluminium foam. It was also found that the crushing resistance and energy absorption capability of tetrakaidecahedral foam was higher than the cruciform-pyramidal and cubic-spherical foam models.