How to see stresses in the plies of a laminate

Altair Forum User

Hi,

i built a model with Laminates, so how can i see my stresses in the plies. I want to know my stress in the facesheets and the honeycomb plie.

Thanks for answering,

 

hubéry10

Altair Forum User

Hi,

 

Please use CTSRESS, CSTRAIN, CFAILURE output requests if you are using PCOMP(G), PCOMPP

Altair Forum User

Thanks for answering i found CSTRESS; CSTRAIN but no CFAILURE  I use PCOMP.

What does the (G) means? If relevant I am using Hypermesh 13

Altair Forum User

Hi,

 

Then you can manually add the CFAILURE in the .fem file. 

 

Open the .fem file in any text editor and the CFAILURE as shown:

 

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

Altair Forum User

thanks for the informations, now i edit my .fem file like shown in the picture, so it works and i have failure Output for each ply. But the Problem is have no stress Output for the plies only for the Composite. But i need the stresses for each ply, because i want to calculate my failure by hand. I hope the pictures show what i mean. 

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

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

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

Altair Forum User

Hi,

 

Can you share the model file?

 

Please use the Link to share the file.

Altair Forum User

OK. from the your .fem file image, I can see that you have requested CSTRESS to be written to PLOT file and .OP2. Instead change it to H3D.

 

CSTRESS(H3D,ALL) or go to control cards>>Global output reuqest>>Change CSTRESS form to H3D

Altair Forum User

thanks for your offer but now i solved the Problem. i had to write cstress and cstrain in my loadcases. for better understanding see the Picture below the first is the old the second the new. I highlighted the lines i changed.

 

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

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

Altair Forum User

ok now everything is fine, it runs with the global request output file. But i have two more questions.

- What´s the difference betweeen Composite Failure and Composite Failure Index

- And the difference between Failure INdex and plies with Maximum FI

Thanks for your help

Altair Forum User

Hi,

 

Please refer to this post: