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I generated a dynain file after forming analysis. Additionally, I used DYNAFORM to trim the mesh, and did springback prediction. However, I found that the predicted springback is too small to be true. What is the problem?

This is a difficult question, there are many factors affecting springback prediction. However, it is said that there is a bug in DYNAFORM in trimming.

This suggestion is try to use LSDYNA to trim the mesh and avoid using other software to do trimming.