Remeshing a composite structure

Hello,

 

For a project of mine, i created a composite structure with different plies and laminates and i applied a mesh with element size 10mm to it. 

However after doing some analysis, i would like to refine the mesh to for example an element size of 5 mm to see how accurate my mesh is and if more refinement is needed.

I'm having some issues with remeshing because all the sets that were created when i created the plies, suddenly become empty after i remesh the structure. This leads to errors when i try to execute the analysis.

What would be the correct way to remesh a composite structure without having these problems with the plies and their sets?

 

King regards