Hello all,
I am trying to model a 3D cantilever beam in Finite Element Software. I am away from my campus and I do not have access to the computer lab so I am using Calculix, a free finite element software, and besides being a free software it takes similar input file as Abaqus. When I model it I have 1 unit force in y direction in all the nodes on one end and on the other all nodes in the surface are fixed and I am using hex elements. I get good results for stress but the displacement I get a bogus answer. And when I animate it I get a plastic deformation rather than a beam vibrating. My guess is fixing the boundary is giving me the bogus answer. My question is do I need to fix all the nodes in the elements at the end or just the nodes in the surface which is at the end?