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Metal forming

Is the order relevant in which I do triming and coarsening of the mesh?

When I do springback analysis after trimming, I need to coarsen the mesh to decrease the memory requirement and increase the computation speed. We can trim the mesh first and then do coarsen the mesh; we also can coarsen the mesh first, and trim the mesh later. Is there any difference between the above two methods?

What are the differences between smooth and non-smooth trimming?

There are two methods in trimming, i.e. smooth and non-smooth trimming. In smooth trimming, the boundary element will be cut exactly along the trimming curve; while in non-smooth trimming, the boundary element can be either kept or removed from the model and it will not be cut in half. What is the advantage of each method?