Reply To: Mesh size dependency in a post-ultimate strength state

[Armin]

Hello,

I have seen in the literature that this issue is tackled with different approaches. One way is to use the coarser mesh in your tensile simulation and then try to adjust the input strain-strain data in the post-UTS regime to match the experimental tensile stress-strain curve. This way, you are implicitly taking into account the mesh size effect by using the same element size to your actual application.

If fracture/failure is of interest to you, you can look up online for a technique called "Mesh Regularization". This technique is implemented in some of the LS-DYNA failure models, for example, but note that there are some drawbacks of using this technique that you may find more information about when you look it up online.

There should be more techniques available to mitigate this that other members in this forum may comment on that.