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  1. Vegas125

    Help with Solid-Shell connection please

    Here is a version of Shell and Solid coupled by a tie constraint: http://imgur.com/Ii3cn To me this seems like the best solution in that case.. if you are very much interested in the stresses at the T-pipe part.. use Solid-Elements and mesh it as one part. if the you are not very much...
  2. Vegas125

    Help with Solid-Shell connection please

    Is it not possible to edit posts here? I created a smaller version of my problem. Created a 2d shell face. Extruded a Solid cylinder from the face --> The shell area has god a hole in it when shell thickness is visualized. http://imgur.com/ZPel6
  3. Vegas125

    Help with Solid-Shell connection please

    No matter how I turn it, I always get stress maxima at the places where the shells and the solids connect. Is this at all avoidable? I'm not interested in the stresses at these position, I just don't want them to worsen the results of the remaining model.
  4. Vegas125

    Help with Solid-Shell connection please

    It happened because of the way i created the parts. I extended the geometry with the geometry edit tools, thereby using the shellfaces for the construction of solid parts below. If I break the solid parts below down to shells again, I get my inner wall back. But how else do I create the solid...
  5. Vegas125

    Help with Solid-Shell connection please

    So the problem is that my desired solid/shell part shares a wall.. which is supposed to be shell and solid.. it would be best to have a second wall in exactly the same place and then connect them with a tie/solidshell coupling constraint.. but i fail to be able to copy the face at the moment
  6. Vegas125

    Help with Solid-Shell connection please

    Here adding a picture of the mesh http://imgur.com/hxn0N
  7. Vegas125

    Help with Solid-Shell connection please

    Hello, I thought I finally had a working connection between my solid and my shell area. But the stress results confused me. While investigating I found this: http://imgur.com/XeZvQ The grey part is the rendered shell thickness of a pipe. It's using "top surface" for wallthickness assignment...
  8. Vegas125

    Abaqus Dynamic Implicit Calculations slow with tetraeder elements?

    Ah, I think I was mistaken. By changing the boundary conditions of this model, I was able to improve the maximum stepsize. Mea culpa. I tend to run into convergence problems more often when I use tetraeder elements.
  9. Vegas125

    Abaqus Dynamic Implicit Calculations slow with tetraeder elements?

    Hello, meshing complicated geometries is a lot easier with tetraeder elements, than it is with hexaeder elements. Using quadratic tetraeder elements seems to yield acceptable results, when one compares results of C3D20R hexaeder- and C3D10R-elements. But when I use C3D10R-elements, or a...
  10. Vegas125

    resonance frequencies and harmonics

    Thanks a lot for the interesting and comprehensive answers! :)
  11. Vegas125

    resonance frequencies and harmonics

    Hello, if a system has got a basic resonance frequency, it's also supposed to swing in the harmonic frequencies, belonging to the basic resonance frequency, if excited, and these harmonic frequencies are supposed to be whole-number multiples of the first frequency(for example...

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