4 Replies Latest reply on Nov 26, 2018 10:47 PM by Andrew Fodchuk

'Pin in Slot' type fixture for a simplified 2D analysis

Andrew Fodchuk Nov 26, 2018 6:09 AM

Hey,

I am not sure if I am not searching for the right term but I haven't been able to find any other relevant question about this.

I have modeled a basic leaf spring and am trying to run a basic static analysis for a given load. I was hoping to be able to analyze it as 2D problem to simplify the computation and reduce the time required between iterations. When doing the 3D analysis, I made use of a slotted mount and used the pin connector so that forward eye was only constrained in the vertical direction.

What would be the 'ideal' way to do this using 2D simplification? So far I was only able to achieve the desired results by adding a 'fixed' plate above the eye and adding a 'no penetration' contact constraint between those two. Is there a more elegant way to achieve this?

Thanks

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Re: 'Pin in Slot' type fixture for a simplified 2D analysis

Bill McEachern Nov 26, 2018 11:17 AM (in response to Andrew Fodchuk)

if it were me i would skip all the contacts and use a remote load rigid restraint to get a sliding restraint at the translating end. I would just use a force for the bottom.
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- Re: 'Pin in Slot' type fixture for a simplified 2D analysis
  
  James Riddell Nov 26, 2018 10:06 AM (in response to Bill McEachern)
  
  Bill McEachern wrote:
  
  if it were me i would skip all the contacts and use a remote load rigid restraint to get a sliding restraint ant the translating end. I would just use a force for the bottom.
  Bill McEachern has a really good idea here. Anything else will get complicated very quickly and SWX doesn't really like that.
  
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Re: 'Pin in Slot' type fixture for a simplified 2D analysis

Bill McEachern Nov 26, 2018 11:21 AM (in response to Andrew Fodchuk)

and one more thing, given the displacements of the spring you would likely need to do a NL analysis as the deflections are large relative to the thickness of the leaf spring elements (components). Further, be advised that some times the remote load function can produce non convergence in the fist step - supposed to have been fixed but it seems to break frequently.
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- Re: 'Pin in Slot' type fixture for a simplified 2D analysis
  
  Andrew Fodchuk Nov 26, 2018 10:47 PM (in response to Bill McEachern)
  
  Thank you so much for the advice, I knew there was a better way of handling this!
  
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