Ply thicknesses don't vary

Altair Forum User
Altair Forum User
Altair Employee
edited October 2020 in Community Q&A

I'm trying to perform an Composite optimization in Altair Optistruct. I have specified my laminate, and want the software to optimize the thickness of the plies. For the set up of the optimization I used a tutorial see: https://altairuniversity.com/7167-new-tutorial-composite-optimization-of-a-formula-student-monocoque/.  I used my own model instead of the racecar.

 

The results of the stresses can be seen in this image: <?xml version="1.0" encoding="UTF-8"?>image.thumb.png.74d8b0fcf3647d542bcd397d0d7b03d0.png

 

Due to difference in stresses i expected the software to optimize my ply thicknesses. However this is not what the plot is showing, see image:

<?xml version="1.0" encoding="UTF-8"?>image.thumb.png.413f318ac73d6a5425ce60e8c7df200f.png

 

The software gives me an homogeneous thickness.

 

Does anyone know what I've done wrong?  

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