How to separate Shrinkage from Warpage

[mahesh_a_patil]

Hi,

I am trying to calculate shrinkage only without warpage. I am measuring the distance by selecting two end nodes but the distance I am getting is including warpage also.

Can anyone share with me the way to get measure distance that will give me only shrinkage?

Thanks,

MaheshP

[Anonymous]

Hi, you can try Isolate cause of warpage in warp setting to get pure shrinkage result.

More detail here: Isolate cause of warpage | Moldflow Insight 2017 | Autodesk Knowledge Network

I hope it helps.

[mahesh_a_patil]

@Anonymous 

Thank you for your reply.

I am aware of that option. My concern is a little different, If we open the warpage result and do examine on two nodes then we can get the before and after the distance between two nodes and also shrinkage (difference in the distance) 

So this shrinkage distance is including shrinkage and warpage and I want to separate this distance like out of total distance XX mm is pure shrinkage and XX mm is pure warpage.

Let me know your thoughts.

Mahesh P

[mppkumar]

Hi @mahesh_a_patil 

if you know shrinkage % for the particular material, then apply shrinkage compensation and find out only warpage

Generally shrinkage will be compensated in the tooling 

[mahesh_a_patil]

@mppkumar 

Thank you for your reply. 

Here is the objective to find shrinkage % for material through the simulation and share that information with the toolmakers. We know most of the toolmakers applying 0.55% shrinkage for ABS material but I am trying to identify correct shrinkage % for each material grade to get critical dimensions within tolerance limit.

In above example is without applying shrinkage compensation, so 4.36 mm is shrink+warp and here I wanted to divide 4.36mm in XX mm is Shrinkage and XX mm is Warpage. 

Let me know your thoughts.

Mahesh P

[mppkumar]

as far as i know its not possible to separate it out.... may be we can wait for comment from others

[mahesh_a_patil]

Yes, Let's wait for comments from Autodesk Expert Team..

I would request the Autodesk team to provide your opinion on this.

Thanks

Mahesh P

[madhukeshwart]

It is not possible to get direct values of shrinkage and warpage.

If part shrinks uniformly & shrinkage applied to mold matches to that... then warpage is zero.  it is not possible in practically

If part shrinks at X %  & shrinkage applied to mold is Y%, Then that difference can be called as warpage.

Shrink analysis enables you to determine an appropriate shrinkage allowance to use to cut the mold taking into account the shrinkage characteristics of the material being used to mold the part and the molding conditions.

Perform Shrink analysis for critical dimensions with set tolerance . shrinkage analysis calculates a recommended shrinkage allowance to be used when designing the mold to get those dimensions within the tolerance 

[mahesh_a_patil]

@madhukeshwart 

Thank you for your reply. I totally agree with your points.

Shrink Analysis Limitations;

1. Can be performed for Midplane and DD mesh only

2. Material should be required CRIMS data

Most of the material doesn't have CRIMS data so I am trying to identify the way by using 3D mesh as 3D mesh doesn't have the requirement of CRIMS data. 

Thanks

Mahesh P