Size Optimization

Hi Deepak,

My idea would be to run a Size optimization with the manufacturing thickness on each ply which is equal to the current thickness of the respective plies and also a laminate thickness limit.

Do we need to link design variable for 3 different PCOMPP? If yes then what should be the approach for that.

I dont think you need to link the DVs since the maximum displacement occurs at the inner region.

Thanks Prakash. your suggestion worked /emoticons/default_smile.png' srcset='/emoticons/smile@2x.png 2x' title=':)' width='20'>

One more query.

If i dont want to add honycomb plies in existing model. I just want to add or remove facesheet plies.

How shall i put that constraint in HM?

Thanks in abvance.

Deepak,

try CONST in DCOMP card.

Thanks Prakash,

It worked and i was able to complete this task.

Hi Prakash,

I am trying shuffle option. after shuffling Core ply is coming at top of all the fachsheet plies. I want core to remain in middle only.

Could you please suggest method for that.

Thanks in advance

Hi Deepak,

Use RANGE option in DSHUFFLE and define the starting and ending ply IDs which participates in shuffling.

You may need couple of DSHUFFLE cards in order to get the stack as required.

Hi Prakash,

I tried method mentioned by you and it worked.

My problem is , i want to reduce displacement by optimization. I met my allowable displacement by sizing , but again it has gone up after shuffling.

What should be my appraoch of optimization if i want to meet certain displacement value after sizing and shuffling.

Thanks in advance.

Hi Deepak,

When you are modelling for Size optimization what is the laminate type?

is it smear, total, symmetric, etc...?

Its total, I did't use symmetry as i have a core in middle of the model.

Deepak,

Can you share the model file?