Composite Shuffle Optimization with plys not in 45 -45° angle

Hi @Merula

Could you please the .out file of shuffling part?

Pairing 45 and -45 reduces in-plane shear stress. 

Sure. .out attached... we noticed that the constraint was violated, so we increased it to see if it would have any results...

I attached the .html as well for you to see what changes with every iteration...

Unfortunatly I cant share the .fem file.

Thanks Prakash.

Unable to find an attachment - read this blog

Hi @Merula

Optimization finished in two iterations and from .out file I couldn't find anything. 

Is it possible to share the model file?

I will create an academic example I can share, which I will send to you shortly. Thanks

As promised, here are the files.

Unable to find an attachment - read this blog

Hi @Merula

If you look at the stack after shuffling, only 0, 90 plies followed MAXSUCC rule but rest were ignored (0, 60). This is intended. The current mechanism accepts only 0/90/45/-45

Developers are already working on in to make a more robust optimization tool.

Hi @Prakash Pagadala,

as far as I understood this, maxsucc is  a constraint from manufacturing side... Why is it limited to 0 90 45 -45 ? Is there a physical reason for this or just a TODO in the feature list?

Best regards

Well, maybe this how it was programmed at the beginning. Proposed, In next version shuffling with MAXSUCC constraint will support all angles. 

Thanks for this clarification. Looking forward to this update.

Is this still the case in Altair 2019 (Optistruct 2019) i.e. if I have a stack with -30/30/90 plies will it ignore the MAXSUCC constraint completely and not be able to pair +/-30 plies?