Rupture of composite laminates

Altair Forum User

hello all,

 

will you please tell me, which engine card i should use to see fiber failure, rupture and delamination of composite laminates

Altair Forum User

and i am not able to see 3D representation of ply thickness, orientation when i do FE modeling for Radioss 

Altair Forum User

HI Rahul,

 

In RADIOSS it is not possible to visualize the plies as can be seen in OptiStruct.

 

There are few failure models available (/FAIL) for composite. Please refer to those models.

Altair Forum User

Thank you so much.

Altair Forum User

Altair Forum User said:

Altair Forum User

how can i see Strain energy in hyperview?

Altair Forum User

Hi Rahul,

 

You can output Strain energy using Control cards>>ENG_ANIM_ELEM>> EPSP.

Altair Forum User

thank you/emoticons/default_smile.png' srcset='/emoticons/smile@2x.png 2x' title=':)' width='20'>

 

Altair Forum User

It is working now. But still it is not giving option to see strain energy in hyperview

Altair Forum User

Hello prakash,

 

i have created my composite plate using- Material: M25_COMPSH and Property: P11_SH_SANWD

now i have to use PUCK criteria for impact analysis. where i should define or assign FAIL/PUCK?

Altair Forum User

Rahul,

 

Create a property with type as FAIL/PUCK.

 

I will get back to you with Strain energy soon.

Altair Forum User

ok but in addition i have to define plies using  Material: M25_COMPSH and Property: P11_SH_SANW.

so my question is how can i use both the properties-- P11_SH_SANDW and FAIL/PUCK for same component 

Altair Forum User

Hello Prakash

will you please reply to my above question?

Altair Forum User

Hi Rahul,

 

Introduce the /FAIL/PUCK property and refer the material in the new card.

Altair Forum User

ok i will do it

Altair Forum User

I am not getting how to assign FAIL/PUCK.

Please help me.

Altair Forum User

i will try one more time and then i will get back to u

Altair Forum User

i am not getting

Altair Forum User

Rahul,

 

can you share the .out file?

Altair Forum User

can you check the Tau Max value?

 

Normal value of Tau Max is 10 times higher than the actual times step should be set in the card directly.

Altair Forum User

that's okay. but i am struggling to introduce FAIL/PUCK property. I am not able to assign it to component 'XYZ'. i hve already defined comp. 'XYZ' using  Material: M25_COMPSH and Property: P11_SH_SANW.

Altair Forum User

Rahul,

 

you dont need to assign to any component. Refer the M25 material in the fail/puck property

Altair Forum User

okay thank you. i will run it

Altair Forum User

Hi Prakash,

 

Composite plate is ruptured as shown in pics. But how to see fibre and matrix failures in small particles?

 

Thanks & Regards,

rahul

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Altair Forum User

And ruptured elements are getting deleted. is there any way to stop it?

Altair Forum User

Hi Prakash 

You are supposed to tell me about strain energy?

 

Altair Forum User

Altair Forum User said:

Hi Prakash 

You are supposed to tell me about strain energy?

 

 

Altair Forum User

Rahul,

 

I am checking with experts on how to output strain energy for composites. I will get back to you soon on this /emoticons/default_smile.png' srcset='/emoticons/smile@2x.png 2x' title=':)' width='20'>

 

Altair Forum User

okay i will wait

Altair Forum User

You can get the output in animation file with /ANIM/ELEM/EPSP

 For Law25 this output is plastic strain energy. It is equal to zero when the material is elastic

Altair Forum User

Altair Forum User said:

You can get the output in animation file with /ANIM/ELEM/EPSP

 For Law25 this output is plastic strain energy. It is equal to zero when the material is elastic

 

Sorry here EPSP gives the plastic work.