Failure Criteria (Rapture) using 3D elements.

Altair Forum User
Altair Forum User
Altair Employee
edited October 2020 in Community Q&A

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"?>post-33500-0-46002400-1414172596_thumb.j

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Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited October 2014

    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"?>post-7616-0-17298500-1414393987_thumb.jp

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited October 2014

    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
    Altair Forum User
    Altair Employee
    edited October 2014

    Hi,

     

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

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