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hubéry10

How to see stresses in the plies of a laminate

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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

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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:

 

cfailure.PNG

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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. 

1.JPG

2.JPG

3.JPG

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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

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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.

 

2.JPG

1.JPG

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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

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