Concrete can be modeled using various material models, including the specialized ones like CDP. But in this case, regular elasticity and plasticitg should be sufficient.
You can try with frictionless contact first and then compare the results with a simple model using different coefficients of...
Contact can be defined for surfaces that are not touching at the beginning of the analysis. You just have to make sure there are no rigid body motions if it’s a static analysis.
General contact is currently the recommended approach in most cases, you can use individual property assignments (even based on material pairs) within it. Otherwise, there’s also the Find Contact Pairs tool to automatically define contacf pairs but it often requires manual adjustments.
Are there any other errors or important warnings ? How large is this model (how many elements/nodes/DOFs) ? What is the memory requirement in the .dat file ? Also, you can try with less subdivisions (e.g. 3).
The level of match between the hyperelastic/hyperfoam model and test results is independent of its stability. It’s a separate concept - you may analyze the material’s stability without comparing it to test results at all.
It’s a different hyperfoam model (with a very different order). Abaqus shows their stability in a given strain range following the concept of the Drucker stability. It’s described in the documentation chapter Hyperelastic Behavior in Elastomeric Foams (paragraph "Elastomeric Foam Material...
Abaqus/CAE has a built-in material evaluation tool where you can enter test data and calibrate selected hyperelastic material models (simple finite element models are submitted internally). Give it a try.
More likely VUEL because you need a custom element, not just a constitutive relation. But it won't be easy. Instead, I would try modeling this in 3D, as it's quite often done with regular plane strain models. With proper constraints, you should be able to achieve the required state of deformation.
This is what it looks like in fe-safe for 3 Abaqus steps with the first two having 5 increments each and the third one having 4 increments.
Imported datasets:
Loading definition:
So you don't have a tie constraint - only rigid bodies with tied nodes. You should also apply a tie constraint between the shell and solid if they are supposed to be permanently bonded on the whole interface.
Do you have strain-free adjustment of secondary nodes enabled ? Also, check the normals on the rigid surface. They should point towards the other part.
Look for some research paper and theses covering such simulations in Abaqus. There are various approaches, some with linear and nonlinear buckling analyses, some with dynamic simulations.
1. Go to Fatigue from FEA --> Loading Settings and add a Block (Elastic initially).
2. In Current FE Models, select the first stress dataset and in Loading Settings right-click on the Block and choose Add dataset.
3. In Current FE Models, select the first strain dataset and in Loading Settings...
