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  1. andrewcm

    Fortran compiler options

    I'm modifying a UMAT subroutine and I'm getting a seg fault-type error from Abaqus when it runs. It's proving pretty difficult to figure this out, and I think it would be helpful if I could turn on bounds checking or similar options when Abaqus calls the Fortran compiler for my subroutine. Is...
  2. andrewcm

    combining output fields

    I'm outputting some SDV fields from a UINTER that I wrote, but they are being written as separate fields for each interface in my model. How can I get a field like CPRESS that is displayed for all of the interfaces simultaneously?
  3. andrewcm

    negative eigenvalues and zero pivots

    I've written a UINTER subroutine and I was having problems with defining the stiffness matrix. I think I've fixed that (kind of inelegantly by just rerunning the code with a small change in displacement to get the change in stress) but I'm still getting convergence problems. The .msg file is...
  4. andrewcm

    Load Displacement curve

    In your results tree, double click on "XY Data." Select "ODB field output" and then "unique nodal" on the next window. On that tab you can select your outputs, stress and displacement in your case. On the other tab, "Elements/Nodes" pick the node you want the data for and click save. You can...
  5. andrewcm

    UINTER convergence problems

    I've written a UINTER subroutine to describe the cohesive behavior between two elastic bodies. I've been having convergence problems with it and I've figured out that it doesn't converge when the interface stiffness is an order of magnitude or so greater than the elastic modulus of the bodies...
  6. andrewcm

    Does UINTER support self-contact?

    The documentation only mentions contact pairs, or does this depend on the formulation of your code?
  7. andrewcm

    high temperature stress strain curves

    Where can I find stress strain curves for pure Al and Mg at elevated temperatures? I know that this data must exist, but I haven't been able to find a source for it. Is there any chance of getting the data for single crystals?
  8. andrewcm

    displaying section borders in visualization

    I have pretty much the same problem as was discussed in this thread: http://www.eng-tips.com/viewthread.cfm?qid=206973 except that the solutions given here seem like they won't work for more than a few sections. Since my model will eventually have dozens of sections, is there a better way to...

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