Calculate a, b & n - Johnson-Cook Model

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

Dear All,

 

if I only have yield strength, ultimate tensile strength, poisson's ratio, and density data, can I get value for a, b & n for Johnson-cook material?

 

Thank you for your help

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Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited November 2016

    Hi,

    For /MAT/LAW2, if user sets Iflag = 1, user will need yield stress ( SIG_y) , Ultimate tensile engineering stress (UTS) and engineering strain ( EPS_UTS ) at necking point. With this new input, RADIOSS automatically calculates the equivalent value for a, b and n.

     

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  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited November 2016

    Dear @George P Johnson,

     

    Great! thank you for your answer.

     

    Best regards,

    Iron_Man

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