Hello!
I am trying to model a rod falling into water and the subsequent collision of the rod with the bottom (and subsequently the walls) in LS-DYNA to determine the stresses in the rod and bottom.
I solve this problem using the ALE (arbitrary Lagrangian-Eulerian) method in LS-DYNA.
I was able to solve the problem of modeling the rod falling into the water (the first picture), but I'm having trouble setting up a two-body problem so that the rod interacts with the body simulating the bottom.
The second picture represents the bodies I am using in the problem. There are 5 bodies in total: air (set as vacuum), water, rod (so far set as rigid body), bottom (MAT_JOHNSON_COOK/SteelA36), air (also vacuum).
The problem is that I can't build no interaction between the rod and the bottom, the rod just passes by the bottom and ignores any interaction as if this domain doesn't exist.
I have set up contact between the rod and the bottom via AUTOMATIC_SURFACE_TO_SURFACE, but it doesn't work.
I also attach a keyword file with this case study.
I will be glad to any advice!
Thank you in advance!
I can suggest several methods to visualize the interaction of the rod with the fluid, particularly if you can repeat the parameters you used for the input, there could be some type of variable or data the system cannot read. Check for parameters for liquid through-flows, fluid porosity, cavitation, and fluid-response contact tests. The fluid-rod contact test can involve setting a local piece from the rod and observing it's interaction with the fluid in a separate environment. Repeat the test with more number of rod-pieces to check how local fluid interaction response behaves.
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