creating interface between two damaged composite material in abaqus

[Wonder_Women]

I am studying composite column (steel tube filled with concrete). so when I apply load on this column, the column will buckle locally and deformed globally. steel will debond from concrete and a small gap will be created.

Now I want to model one interface between these two materials (gap created in between after damage).

Is there any way I could do this?/ I have been trying for so long but could not get success.

 

[FEA way]

Which options have you tried so far ? Surface based cohesive behavior (cohesive contact) seems like the best choice in this case.

And if you want to account for contact between interior surfaces revealed during the analysis due to element deletion then there’s an option to model surface erosion with general contact.

 

[Wonder_Women]

Thanks for your reply. i cant implement the suggestion you gave. please tried to explain the problem below.

my problem statement is..

I will apply an axial load to the column. the column will deform/damage and a gap will be created.

The next step is to Import the deformed geometry and create an interface ( and also assign air properties to this interface) between steel and concrete. and finally, do the fully coupled thermal stress analysis.

how can I do it? I just want a little guidance to proceed in right direction.

 

[Wonder_Women]

and also this gap won't be uniform. Somewhere it will be 2-3mm and somewhere it will be 0.1mm or less. so basically whatever space will be created in between steel n concrete i want to fill it with solid elements and assign air properties of conductance etc.

and also I can not delete elements of concrete after damage. because concrete is confined inside a steel tube and even after concrete gets damage it will provide some resistance to the steel tube against local buckling.

 

[FEA way]

Normally thermo-mechanical general contact would be the best choice. But if you need solid elements in the gap then you have to fill this empty space first (using boolean operations) and mesh the new volume. Then apply tie constraints between this new region and original geometry.