August 29, 2023 at 10:06 pmPeter YipSubscriber
I have used the Mie-Gruneisen equation of state for water and am trying to verify that the response I am getting is correct. Since the water is being fully defined by the EOS (i.e. strength model = NULL), the response should be pretty easy to plot since it would just be a P-V (or in this case P-mu) curve. I have found that the internal energy per unit volume, E, is really important because all the other terms become quite small. However, the LS-DYNA manual doesn't go over how this is computed that well... How should I handle that?
August 30, 2023 at 11:25 pmUshnish BasuAnsys Employee
The first history variable after the plastic strain slot holds the internal energy if an EOS is used. (set NEIPH in DATABASE_EXTENT_BINARY or OPTION1 in DATABASE_ELOUT to get history variables output)
The calculation of internal energy is described at the end of Appendix B in the Keyword Manual, in the section "Implementation Discussion"
August 31, 2023 at 3:02 pmPeter YipSubscriber
Thank you for your response. I will pull the internal energy and develop my P-V (or P-mu) curve to see if it matches.
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