What have I done wrong with shuffle optimization, why the core ply change the position, actually it should not be stacked?

Paphatsorn
Paphatsorn Altair Community Member
edited May 2022 in Community Q&A

I am doing a shuffle optimization with monocoque structure with composite material, and the result of it did not correct. The core ply (Rohacell) should stay still. I do not know which steps did I miss? 

As you can see the core ply which has orientation on 60 degree need to stay still as iteration 0 but the other plies should stack until the optimizer find and compute the optimal layout for this structure.

image

The result that I need to get will be like following picture.

image

I will attach the model file of my shuffle optimization, so you can check it out.

Thank you in advance. Please help me I am struggled with this for 3 days.

Best Answer

  • PaulAltair
    PaulAltair
    Altair Employee
    edited May 2022 Answer ✓

    I don't see your model attached, but did you define your CORE as such? for this to work as expected, you need to have a symmetric matrix too

     

Answers

  • PaulAltair
    PaulAltair
    Altair Employee
    edited May 2022 Answer ✓

    I don't see your model attached, but did you define your CORE as such? for this to work as expected, you need to have a symmetric matrix too

     

  • Paphatsorn
    Paphatsorn Altair Community Member
    edited March 2022

    I don't see your model attached, but did you define your CORE as such? for this to work as expected, you need to have a symmetric matrix too

     

    Sorry for that, this is my model file. 

  • PaulAltair
    PaulAltair
    Altair Employee
    edited March 2022

    You had specified only a single CREP repetition of a single ply as 'CORE'  this was satisfied by only having PLY 44, in attached I set CREP repetition instead to 9 which returns:

    image

  • Paphatsorn
    Paphatsorn Altair Community Member
    edited March 2022

    You had specified only a single CREP repetition of a single ply as 'CORE'  this was satisfied by only having PLY 44, in attached I set CREP repetition instead to 9 which returns:

    image

    Thank you so much, sir.