@csuznxg i encountered the negative internal many times, when i was adjusting my model. but i cant find the reason for negative internal energy.

@csuznxg I don't know which operation cause the right energy results 😰 . I didn't use the shell element, but used solid element and beam element,when...

@csuznxg i’ve had the the same problem, negetive internal energy in ls-dyna. Then I adjusted the model, the result turned out to be normal. but i stil...