3 Replies Latest reply on Oct 28, 2010 5:03 PM by Ryan Werner

constraining and analyzing keyways

1-U21US0 Oct 22, 2010 5:31 PM

Does anyone have advice about how to model a part with a keyway? I've tried constraining it a number of ways. The way that seems most logical to me is a roller/slider fixture on the face in contact with the key. However when I do this I get an error when solving that says it may be under-restrained. I'm applying a torque to the shaft itself. I can get a solution when I use fixed geometry on that same keyway face, but I don't believe this is correct since in reality the face is only constrained in the normal direction. Any advice?

Re: constraining and analyzing keyways

Ryan Werner Oct 25, 2010 9:42 AM (in response to 1-U21US0)

Hi Tyler,

You can restrain it in the normal direction only using the User Reference restraint. You may still get the warning the your model is under restrained though. Does your shaft have any bearings on it that you could add as Rigid Connections or something like that?

Ryan W.
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- Re: constraining and analyzing keyways
  
  1-U21US0 Oct 28, 2010 4:58 PM (in response to Ryan Werner)
  
  I got it to work. I think adding a bearing fixture did the trick. Thanks.
  
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  - Re: constraining and analyzing keyways
    
    Ryan Werner Oct 28, 2010 5:03 PM (in response to 1-U21US0)
    
    Glad to hear it.
    
    Ryan W.
    
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