Concrete material model

[Struct71]

Hi all,

I am making a simple model which includes concrete and steel. For steel I am using non-linear plastic properties (TB,KINH...) and that works perfectly. This has worked perfectly also in other models.

Now I also want to include concrete material in the model, including its non-linear properties, like high compressive strength and no tensile strength. The concrete contains no rebar. My current model contains:

ET,3,SOLID65 !concrete 3d solid

MP,EX,3,32000 !elasticity
MP,NUXY,3,0.4
MP,DENS,3040

TB,CONCR,3,1,1,,0
TBTEMP,1,1 ! only one temperature
TBDATA,1,1,1,2,40,40,1 ! Values to be filled in according
TBDATA,6,1,40,40,0.2 ! to SOLID65 element description

So far I did not get the concrete model to work. Anybody any idea what I am doing wrong?

 

[ansysfreak]

Why is it not working? Do you have convergence problems?
Be more specific.

 

[Struct71]

I have observed several problems, including extreme distorted elements (solution did not finish...) "not enough data points provided", amongst others.

 

[ansysfreak]

Well use smaller elements, set more substeps.