How to tackle Negative element density error in prestress explicit simulation


I am trying to perform a prestress explicit simulation but face Negative element density error and a warning in explicit as shown below. The model includes a socket and a screw(simulation uses ¼ model). 

First step in static is a large deformation interference fit simulation between socket and screw.

Second step in explicit is to extract the screw from socket

By the way, the mesh is completed in Hypermesh, and if I suppress the prestress condition in explicit, there is no problem to finish the explicit simulation. I have attached my wbpz file.

Thank you in advance! Hope everything is doing well with you!


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