Tilmann Allzeit Can you share your Abaqus model (.inp)?

This sounds like a pure visualisation problem. It is unavoidable that penetration effects appear to happen when you scale up your displacements. If there is no penetration when the sacle factor is set to 1 you can be quite sure that there is no penetration in your model.

To check if you have an issue with your contact I would recommend to have a look on the contact forces (CPRESS or CFN) and the contact opening, COPEN.

Hello, Tilmann Allzeit

When you impose in your model scale factor, what you are analysing is "almost" an unrealistic motion. The scale factor is based on the node displacement, so if the nodes are connected, for instance using "tie" constraint Abaqus can predict quite well the deformation. On other hand, when you have contacts, the nodes are unconnected, when you introduce the scale factor visually you may observe some penetrations, which is quite normal and this does not mean that you model is wrong. In order to verify if the contact is behaving as you want, I suggest you to analyse the CPRESS or the COPEN, as Raffael Bogenfeld mentioned.

I thank you all for your help. I checked CPRESS and COPEN as you suggested and there seems to be no issue with it.

In finite element simulations using software like Abaqus, it's generally important to address any issues related to parts penetrating each other, regardless of the deformation scale factor. Penetration can lead to unrealistic results and should be avoided. Here's how you can handle this issue:

Contact Settings:

You mentioned using "hard" contact with the default constraint enforcement method. While this is a good starting point, you may need to adjust some contact parameters to prevent penetration:

Friction:

If you're using frictionless contact (tangential behavior), it might lead to sliding without separation. Depending on your problem, you might want to add a small amount of friction to allow parts to separate more easily.

Surface-to-Surface Contact vs. General Contact:

The choice between these contact types depends on the specifics of your problem. Surface-to-Surface Contact is suitable when you have well-defined, smooth contact surfaces. General Contact is more versatile and can handle complex contact interactions. In your case, where you're dealing with implant parts and potentially complex contact scenarios, General Contact may be a better choice.

Mesh Refinement:

If penetration persists, consider refining the mesh, especially near contact regions. A finer mesh can better capture the contact behavior and help prevent penetration.

For more, you can connect with me on my WhatsApp; https://wa.me/+923440907874 to get guidance.