How can I see the crack propagation visualisation?

I am modelling a steel fibre reinforced concrete beam in Abaqus. I will be using the concrete damage plasticity(CDP) model. I have obtained the engineering stress-strain data from experimental tests. Now, when calculating the damage parameters and inelastic strains, do I need to first convert the engineering stress-strain curve to a true stress-strain curve?

After I set up the Pre-meshed Crack, I add the SMART. It shows two options are yellow. One is initial crack, and the other is critical rate. In the initial crack option, i can select the Pre-Mashed Crack, but it's still yellow, which means here has error.

Question:

What the reason would cause this issues?

What initial materials properties i should add?

I wonder if there is an option, rather than Tie, in Abaqus CAE to constraint the temperature of a node (i.e. its 11th DOF) to be equal to the one of another during the whole simulation time.

In other words, I am looking for modelling perfect thermal contact (i.e. no thermal resistance) between opposite surfaces of separate entities in Abaqus without using the famous Tie option.

It will be also of interest if someone explains how to equalize two remote nodes in terms of temperature (or any other property) via Abaqus GUI.

Hi all,

I was trying to model deflection in a rectangular cross-section beam fixed at both ends. There is a Pressure Load acting on the beam (uniformly distributed along the beam). In such system, analytical calculation of the maximum deflection is well-known (see attached). Using this formula, I found my deflection as 35.5 mm. However, in the Abaqus, the result was 41 mm (%16 error).

I tried different element types, mesh densities, 3D shell modelling, non-reduced integration; however, the results are always in the range of 39-43 mm. I couldn't converge to 35 mm in any case. I also modeled the same system in Solidworks Simulation and the results were similar to the ones that I got from Abaqus.

I also compared the results at different pressure values (see attached). Simulation results show the typical linear behavior but it looks like as if the Young Modulus was somehow lowered.

Do you have any idea where this error comes from in such a simple model?

Edit: I have checked boundary conditions, and material properties many times. I don't think there is a problem regarding to them.

Hi,

I would like to have deeper understanding regarding using the option nonlinear geometry on or off in Abaqus. What does exactly come into effect when we use this option? Is it just taking the higher order strain terms into account in the relation between displacement and strain?  Can we use this option as on for any kind of static/dynamic simulation with better accuracy (though time expensive) compared to the case this option is off?

I would greatly appreciate your answers.

Best,

I am trying to mesh a Post Tensioned Slab with 2 parabolic ducts in it. Since the duct goes parabolic i am unable to obtain Structured mesh.

I have attached the ABAQUS model and a screenshot of the slab.

Does anyone has any suggestion how can i do better meshing 

Can one create a centre crack using XFEM method in ABAQUS? I created an edge crack earlier and it worked perfectly. However, if I try to create a centre crack, it says, "failed to locate crack tip". Is this a limitation of the software or an error? I'm using 6.12-3 version.

I was trying to model the behavior of concrete for its possible crack propogation, i was planning to use smeared crack and cohesive zone models in ABAQUS. Do i need the experimental data to input the required parameters? If not do suggest suitable way to get the input data.

I don't want to use inbuilt XFEM crack initiation and propagation criteria or udmgini