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abisahi, Would it be accurate if you use the weight of the structure itself as the force and use the projected area (projected down) to arrive at pressure at all the nodes on the hull and use these two as the boundary conditions?? -This is me

Hi Analyst89, I am stretching my logical reasoning capability here. So I might be wrong. The reason i think is because of the node count. If you refer back to the theory of FEA, you end up solving matrices for an element of 2 nodes (that is the starting point FEA theory that everyone studied I...

Ricinus, You are right in thinking that the stress reaches too high a value when u start refining the mesh. Mesh convergence study would be helpful, but not in singularity case i think. I would refer to the mesh quality guideline from the client and note the minimum element size required. Then...

Hi Ladykin, What I said in my previous post is inline with what rb1957 said here. By "extracting faces", I meant you could automatically duplicate the "SIDE" of the solid mesh that you need to generate the shell mesh on. Once again, I am not an abaqus user, but, Abaqus being such a solid...

The code did display negative buckling factors and, because in my particular case, negative buckling factors doesn't mean anything I had to tweak my input deck to ignore all the negative buckling factors. Thank you everyone for sharing your experiences/knowledge regarding buckling. I see I...

Hi, HYPERMESH (preprocessor), OPTISRTUCT (solver) I am working for Altair (not as a sales person, but as a FE engineer) and I am pretty sure the above combination can suit your needs. Whats more, the solver can be used to optimize the structure (weight reduction of structure for given loading...

Hi Ladykin, I approximately think that I have understood the problem and I am trying to answer it. If its not the right answer, please pardon me (especially because I am a fresh grad and have loads to learn). I am not a Abaqus GUI user (I use Hypermesh). But if I wanted a thin walled shell...

I have found the solution and I am writing it here for helping others. Negative buckling factor is a NON_PHYSICAL thing which indicates that buckling occurs when the loadcases are reversed. They way I tweaked my input deck to show me only positive buckling factors is by asking the solver to...

Hi all, Please can anyone help me interpret negative buckling factor? Also, how can I change my deck to show me positive buckling factor? Thanks, Arun