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Same Part - slightly different modeling approach - different mass properties

Question asked by Daniel Sullivan on Nov 19, 2018
Latest reply on Nov 20, 2018 by Deepak Gupta

Hi -

 

I teach a sophomore level mechanical engineering CAD class using Solidworks. I created a part for a quiz and saw that a couple of students were getting the same "wrong" answer for the part mass. When I looked more closely at the issue I realized that the variation was a result of modeling technique.

 

The discrepancy is very slight but it is real. The attached image shows that the feature causing the issue is a pocket cut that has a sketch that is defined by four circular curves - I have also included a link to the actual part models.

 

As a sanity check, I built this part yesterday evening using Fusion 360 and both techniques yielded the same value as they should.

 

Does anyone know if this is a "known" issue with Solidworks?

 

Thanks!

 

Link to part models

part modeling problem.PNG

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