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Forming/Compaction analysis help

Forming/Compaction analysis help

Forming/Compaction analysis help

(OP)
Hi all,

I have completed this first part of a forming analysis in abaqus explicit.  In the first step a powder bed of 10mm is compacted to 3mm.  the assembly consists of a die wall and top/bottom punches.  Can anyone suggest how I can create a second step to determine the springback distance after the top punch is removed?  I tried removing the contact condition but the resulting mesh is unrealistic and severely distorted.

Any ideas are greatly appreciated.

thanks,
Chris

RE: Forming/Compaction analysis help

Hi Chris

I don't know if this applies in your case, but...

I do a lot of metal forming springback in Standard.  I do the forming step in Explicit, and then *IMPORT the results into a Standard analysis with a single *STATIC step.  There are no loads in the static step, just the boundary conditions needed to prevent rigid body motions.

Regards

Martin

RE: Forming/Compaction analysis help

(OP)
Martin,

thanks for the reply.  I am using the drucker-prager cap model for the material and i have read in the documentation that the import option may not be used for this model.  Do you know anything about this?  I have done the import and it completes successfully in standard, but there are no results.  Any ideas?

thanks,
chris

RE: Forming/Compaction analysis help

Hi Chris

No experience of using drucker-prager I'm afraid - purely metal bashing for me smile

It might sound lame, but have you got output requests in the springback step?  Also, I usually use *IMPORT with update=yes and state=yes (default).

Other than that, I'm a bit stuck for answers....

Regards

Martin

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