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LS-DYNA EOS Define Johnson Cook Material

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Luise123

Student
Aug 25, 2023
1
Hello everyone,

I would like to implement a standard tensile test using Johnson Cook damage mechanics. I have to specify EOS for the MAT 15 Johnson Cook material. I do not understand exactly why I have to specify this so precisely. Can someone explain this to me? Do I understand correctly that this represents the denominator in the triaxiality formula for plastic strain? But with steel, the volume does not change plastically during a tensile test?

And what EOS do I specify for this if I want to simulate an S500, S700, S770 and S960 Steel? Where can I find parameters in this Case?

Best Regards Luise
 
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