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Valued Contributor
tim.vanast
Posts: 67
Registered: ‎07-17-2009
Accepted Solution

Does a Core Shift analysis alter wall thickness?

565 Views, 5 Replies
06-01-2012 12:53 PM

Does anyone know if a core shift analysis alters the wall thickness the appropriate amount as the core shifts?  This would then be seen as a restricstion (depending on the amount of shift) to flow on the one side, and a flow leader on the other side of the core.  This intern should create an even greater core shift do to the differential flow down the lenght of the core.

 

Thanks,


Tim

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Product Support
Shawn_Gedman
Posts: 27
Registered: ‎06-11-2010

Re: Does a Core Shift analysis alter wall thickness?

06-04-2012 06:48 AM in reply to: tim.vanast

Hello Tim,

 

Yes, the core shift will be taken into consideration during your 3D flow analysis when the core shift option is on.  We start filling the part, perform a core shift step, update the part mesh, and then repeat through the duration of the cycle.  You should see the core shift being performed between fill steps in the logs, similar to the image below.

 

logs.jpg

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Valued Contributor
tim.vanast
Posts: 67
Registered: ‎07-17-2009

Re: Does a Core Shift analysis alter wall thickness?

06-04-2012 07:02 AM in reply to: Shawn_Gedman

Thanks Shawn.  I knew that the core shift was running.  I just wasn't sure if the mesh was changed to reflect the new thickness in the part.  I can understand how this would be done with a midplane since the thickness is just a value.  I wasn't sure if the 3d mesh was updated.  I appreciate your answer.

 

Thanks,


Tim

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Active Member
sadashivpimple
Posts: 6
Registered: ‎01-10-2013

Re: Does a Core Shift analysis alter wall thickness?

01-31-2013 05:12 AM in reply to: tim.vanast

The nodes are just moving there are no new nodes created.

if Moldflow can generate new nodes then it will be against the conservation laws

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Product Support
Shawn_Gedman
Posts: 27
Registered: ‎06-11-2010

Re: Does a Core Shift analysis alter wall thickness?

01-31-2013 07:26 AM in reply to: sadashivpimple

Correct, the mesh is being "updated" so the part is not being remeshed or recreated during the process.

 

Thank You,

Shawn

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Active Member
sadashivpimple
Posts: 6
Registered: ‎01-10-2013

Re: Does a Core Shift analysis alter wall thickness?

01-31-2013 07:45 AM in reply to: tim.vanast

I think u guys know it but still in 3D mesh the core can bend more then part thickness.

If you perform core shift usind Fusion mesh then the core can understand that i can not bend anymore because zero thickness is reached.

In 3D the nodes are moving but we can understand it if the core is bending more then your part thickness then something is worng

 

Regards.

 

 

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