Wrong sandwich curvature at 3 Point Bending Simulation

Altair Forum User

Hi!

I am trying to simulate, using hypermesh (optistruct), a 3 point bending test of a composite sandwich panel made of carbon fiber and aramid honeycomb.

I have modelled the core using PSOLID property and MAT9ORT material and the skin where modelled using the tool 'find faces', and then creating four CFK plies that form a laminate which is associated to the property PCOMPP that the skins have. I used MAT8 to define CFK plies.

 

The Optistruct solver doesn't output any errors at all; however, when visualising the deformed shape, it represents an absolutely wrong and wierd shape for the sandwich panel where the supports are as shown in the attached picture (right and left side of the photo). I've tried to model it several times and even change some properties in case there was material failure in such points, but didn't work. I need help as soon as possible.

 

Thank you!

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Altair Forum User

Hi manuogm,

 

Please can you share us the model file.

Please use the FT link below.

https://ftin.india.altair.com:8443/filedrop/~osKE8Q

 

 

Thank you
 

Altair Forum User

Hi manuogm,

 

Your result looks absolutely fine (Deformed shape- see below image)..

<?xml version="1.0" encoding="UTF-8"?>

 

You just need to reduce the scale. Reduce the value to 1 and check

 

Thank you