How to simulate a screw/nuts system

"[email protected] [Abaqus]" <[email protected]>
Newsgroups gmane.comp.mathematics.abaqus.user
Message-ID <[email protected]> 
Hello everyone,
 

 I'm trying to solve a dynamic explicit problem envolving a screw and nuts. Do you know how could I simulate this system? I need to apply a torque and to verify every kind of stress and strain on the threads.
 

 Thanks in advance.
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