S4R elements

FatmacFatmac
I have been working thru a few shell examples from this document https://hub.hku.hk/bitstream/10722/54269/2/92945.pdf to get a better feel for the shell elements used in Calucix - particularly with non-linear analysis. I have set up a solid model as a control and have been playing around with different shell elements. With S4 elements the solution looks reasonable compared to the abaqus results presented in the paper

But, from what I understand, S4R elements were used in the study, . When I try to use S4R the deflections are significantly less -perhaps I am not setting it up correctly?
any ideas

Comments

  • FatmacFatmac
    here is a picture of the set up, the papers results and the S4 element results
  • disladisla
    No problem with your set up. This is a known limitation of the calculix S4R formulation. There is a strong shear MODE III present in the benchmark which S4R (Expanded C3D8R) is not suitable for.
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