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Optimise ply orientation for minimum deflection

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Guest

HI,

 

The model looks fine, but the orientation after optimization for both the plies is same. Maybe coincidence. Further investigation is required to arrive at a conclusion 

 

 

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Hello,

 

I have the geometry underneath consisiting out of a lot of surfaces.

image.thumb.png.814e6e2c639da5b283ca99b3c28cc262.png

 

What is the best way to optimise for optimal fibre direction and laminate thickness, so that each surface reveals it's own fibre orientation.

 

In my previous model I tried assigning all surfaces into a single set:

image.png.932b212582cd6cb4e547454c3d61ab3c.png

 

But after otimization, it seems all the fibre's are directed into the same orientation.

 

-I need a different orientation and thickness for each surface

 

 

Can you help me with this?

 

Best regards,

 

Joep

 

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Guest

Hi @Joep

 

I would suggest either do an orientation or thickness. I am more inclined towards thickness optimization instead of orientation.

 

You can run a three phase optimization to reduce the weight. 

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Hello,

 

Thanks for the reply.

 

I tried a new analysis and this error keeps appearing:

 

Any idea what it can be?

 

I also uploaded the model

 

Best,

 

Joep

 

image.thumb.png.ff3f99b49fe4452ea6aec8031d3c5f6d.png

EenBoeg_10.hm

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Hello,

 

I do have this problem now:

 

After optimization almost every ply has a very small angle of orientation. 

Any idea why this is the case?

 

image.thumb.png.260d9d2444e32c06ebc601c19adb6a6f.png

 

 

In the design variables I have assigned a minimum of -180 degrees and maximum of 180 degrees

 

Could it have something to do with radians? since in other test optimizations it worked with these settings.

 

Best,

 

Joep

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Guest

@Joep

 

As suggested, it is always better to start with thickness optimization with a varied orientation. Please see the image for more information.

 

The predicted orientations may not be practical and any degree in the angle may lead to failure. 

NLSOO.png

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