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Failure Criteria (Rapture) using 3D elements.

Altair Forum User

I am simulating a projectile striking a metallic sheet.

I used a P14_Solid property card and element as 3D tetra

but after simulation the material is unable to rapture.

Somebody please guide me...

for reference attached is the Image......you can see that the material extensively elongated but no rapture.

Value for Max Plastic Strain used :- 0.750<?xml version="1.0" encoding="UTF-8"?>

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Altair Forum User

Hi paramveer_singh

what material model are you using?

if you are using /MAT/LAW2 (PLAS_JOHNS) enter the plastic strain value in SigmaP. When SigmaP equals to SigmaMax elements get deleted (this is valid only for shell elements)

You can also refer to /FAIL on RADIOSS help to know about different failure models and their compatibility.

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

Altair Forum User

Thankyou Praksh for your valuable reply,

I was successfull in simulating the same problem using SHELL elements

My intension to conduct the comparison between the results obtained from property card

P1SHELL and P14_Solid.

Results with P1SHELL property card were succesfully accomplished

Kindly guide me how to use solid elements for rapture analysis.

Altair Forum User

Hi,

Please refer to Ifail_so in /FAIL/JOHNSON failure criteria. You can also refer to refer to the example26 on RADIOSS help document.