How much a difference do LS-DYNA versions have? R7.0 and R11.0 particularly.
I once used LS-DYNA R7.0 to model an underground pipe full of water, and recently I have modeled the pipe again, using LS-DYNA R11.0. It shocked me that there is a noticeable difference in the results. I have narrowed down the reason to either CONSTRAINT_LAGRANGE_IN_SOLID or EOS_GRUNEISEN.
I would appreciate if someone can tell me why there is such a difference.