Calculate a, b & n - Johnson-Cook Model

Altair Forum User

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

Altair Forum User

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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