Apply symmetry restrictions over design space or not

MaUb
MaUb Altair Community Member
edited September 20 in Community Q&A

Hi,
I've been working on the topology optimisation of a symmetric component. The objective is to minimise its mass, and stress constraints are applied. (eating away material from the design space without compromising the material integrity.

 

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To reduce the computational load, I've removed half of the geometry and applied displacement constraints to mimic the symmetry effect. However, I don't know if I should use these restrictions for both design and non-design spaces or only for the non-design space.

I tried both ways, obtaining different outcomes (Left: restrictions only over the non-design space. Right: restrictions over design and non-design space.)

 

image

 

Both appear to be valid. Therefore, I don't comprehend if it's better to define this type of restriction over the design space or not. 


Regards,

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Answers

  • Adriano A. Koga
    Adriano A. Koga
    Altair Employee
    edited September 20

    Symmetry conditions should be applied to the whole model, irrespective if design space or not.

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