ANSYS Workbench

[KAKASHA]

Hello Dear engineers,
I'm new in this community, as I was looking for some answers regarding my project I come up with this awsome platform.
recently I'm doing FEA for UHPFRC (Ultra-High Performance Fiber Reinforced Concrete) using ANSYS workbench.
I have some question If you can help me.
I want to simulate failure in slab, using UHPFRC.
I have added the following data

and the following command to ANSYS workbench
TB,CONCR,matid,,,MSOL
TBDATA,1,2,1,1e-3,100,10,1e-20
But during simulation I have the following errors,

particularly the first two error I don't know how to solve them.
Pleas provide me with any suggestions or solution, I Higley appreciate your help. Thank you for your time
Regards.

 

[FEA way]

What are the boundary conditions ? This model is likely underconstrained.

 

[KAKASHA]

this is the boundary condition
A fixed supper (cylinder fixed supper under the slab)
displacement in the top middle of the slab
and there is a notch under the slab as well.

 

[FEA way]

Is the fixed part connected with the slab ? You could run a modal analysis to see if there are any rigid body motions.

 

[KAKASHA]

the fixed part is implanted with the body, and there is no rigid body

 

[FEA way]

All right but if those are separate parts then they should be connected with some kind of embedded region constraint. It seems that Ansys doesn’t support this type of interaction so you should make a hole in the slab to place the cylinder or model the cylinder using line elements (those should be easier to embed in solid mesh).

I was talking about rigid body motions - translations and rotations of underconstrained parts.

 

[KAKASHA]

I don't think this is the problem because If I remove menetrey william data from engineering data, I can run simulation without any error.
I think when adding menetrey william data I need to add some other command which I can not find.
What I'm looking for is force vs deflection graph, and I need softening part
(

to be specific, I want this graph, where the slab start to deform and then after first crack, the load is decreasing and displacement is increasing.

 

[FEA way]

Maybe it’s not a direct cause of the problem but I would still carefully check this connection and make sure that the software handles it properly.

When it comes to material properties, try testing them on a simple model first (maybe even single element as it’s often done).