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Thank you so much for you reply, I used Automatic_Nodes to surface contact for the impactor and the confinement which is the plate wrapped around the concrete sample and it is the medium that impactor hits. I attached the results.

What kind of contact are you referring to ?

Sure Attached are the impact load vs time for the impact from the impactor to the confinement and the confinement with the concrete

. The boundary conditions can be seen from the attached pic. Three concrete blocks with 150x300x150 mm3 dimensions are attached to each other with an insertion of a rock bolt fixed with a nut at the end. A hammer impacts on the middle of the section with a define velocity of 6.5 m/s (Initial-...

Hi guys, I am using Ansys/LS-Dyna to simulate behavior of a rock bolt jointed concrete under impact load. I have attached a schematic of the model for your consideration. I have used rigid material for the impactor, MAT_159 for concrete and grout, MAT_24 for the rock bolt, MAT_003 for steel...