Strain in Y when sheared in XZ and a strain in X when sheared in YZ

Altair Forum User

Hello everyone,

 

Please see the attached images. The RADIOSS solver is giving;

• a strain in Y direction (unexpected) when the model is sheared in XZ direction
  
• a strain in X direction (unexpected) when the model is sheared in YZ direction
  

 

Has anyone already faced such an issue? 

Do you have an idea what's happening here?

 

Best regards,

Sushant

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Rahul Rajan_21763

Hi,

Could you please share us the out file?

Regards

Rahul R

Altair Forum User

Hi Rahul,

 

Unfortunately I don't have access to any other file due to sharing policies. Just these two graphs.

 

Best,

Sushant 

Rahul Rajan_21763

Hi,

Could you please share screenshot of the model, contact type and boundary condition information?

Regards

Rahul R

Altair Forum User

I've attached the BCs and and the load applied, it is a one element model.

 

Honeycomb material law (28) is used, with co-rotational formulation. The r,s,t are correctly defined, with 't' being the out-of-plane direction and 'r' and 's' being the in-plane. A solid orthotropic property was set for the honeycomb, and full integration was used. 

 

isolid 17

Ismstr 4

Iframe 2

Ip 1

 

Apart from the unexpected strain attached earlier, there is also another problem, where RADIOSS outputs (follows) the input XZ yield curve when the model is sheared in YZ, and outputs (follows) the input YZ yield when the model is sheared in XZ. 

 

Do you have an idea where the problem may lie?

 

Thank you. 

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Rahul Rajan_21763

Hi,

 

Could you contour the displacement plot in all three direction and cross check the same?

 

Regrads

Rahul R

Altair Forum User

Hi Rahul,

 

I've attached the displacement contour plot, as well as the displacement function which was first imposed in the -X direction, followed by the +X (with the translation Z unconstrained).

 

My regards

 

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Unable to find an attachment - read this blog

Altair Forum User

You can ignore my last post as I already have the answer to that one. The question at the start of the thread is still open.