How many of you have used SIGMASOFT simulation program?
How many of you have used SIGMASOFT simulation program? If you know of a good article that compares them along with Moldex3D please let me know.
Also, some of the advanced capabilities (transient cooling, post-molded shrinking, crystalization effets, ejection simulation, conformal cooling, etc.) that i was talking about are being introduced in moldflow as we discuss this but they have been in Sigmasoft for quite a while which in my mind gives them some credibility.
Also i have heard from some very prominent Hot runner manufacturers that Sigma soft does a heck of a better job at capturing shear imbalances in the runner system than moldflow.
Till date i have never been able to capture shear imbalances in a geometric balanced runner system using moldflow. I have done everything i can possibly think of for the mesh and follow every single recommendation but never had a successful result and that problem is one of the first examples on Sigmasoft's website. Now those things make me wonder is there something better out there...
As to your question of core deflection, I think one issue could be the symmetry of your mesh. I'm not sure what mesh you are using, but if the mesh is not symetric across all axis there will be slight pressure differences and this could cause some slight deflection.
I am moldflow user too and mostly 3D. I have spent a lot of time modeling the classic runner imbalance (fan gated, u-shaped, 8-cavity piece) in 3D using all of the mesh recommendations (10 layers, aspect ratio, iel, etc....) and an extremely high tetra element count, but have never captured the imbalances. I would love to see what you were able to acheive (if you can share an image).
As for the mesh symmetry, at the time moldflow support team told me that the mesh was not an issue as for why i was seeing the problem. But on a different note, i dont think you have too many options to ensure a symmetric 3D mesh.
I just sat thru a sigmasoft webinar yesterday and i asked some of the questions that i face problems with in moldflow and they seemed like a simple deal with sigmasoft. One of my questions was "Do we need any special mesh requirements to capture shear imbalances and other problems (jetting, etc.)" and they said you do what you are supposed to do for every part and it just analyses those conditions everytime.
I agree that moldflow resin library is the key here but simulated an advanced set of problems with relative ease is also important.
Again, i am not trying to judge or replace one with the other but instead meaningfully compare the various programs to see how they could complement each other.