LS-DYNA Blast Analysis Incorrect Deformation
I am trying to model a blast at the center of a hollow cylinder. However when I run the simulation it seems to be that the deformation is inverted, sucking in the cylinder instead of expanding it outwards. The deformation should be going outwards but instead does the opposite. When I move the explosion onto the outside of the cylinder, it displays what I would think is the correct deformation and caves in the cylinder.
I think it must be something wrong with some keywords maybe MAT or LOAD or SECTION (Integration method). Please also let me know if anyone has experienced this and knows what the issue is? Attached below is a picture of the pre-post if that is of any help.