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Recent content by Jlog50

  1. Jlog50

    Understanding Abaqus memory usage

    Hello all, I am using Abaqus 6.10 and have 3GB on my machine, I have 32bit Windows XP. Reading through the manuals, I just wanted to make sure I understood this correctly.. Is 2GB's the maximum memory I can allocate to an analysis for a machine with up to 8GB (this is what the manual says but...
  2. Jlog50

    Elastic-Perfectly plastic material models

    I am trying to find out more information regarding elastic-perfectly plastic material models. I am considering the FE analysis of metals and looking can I apply a elastic-perfectly plastic material model to my analysis? Thanks.
  3. Jlog50

    free rotation

    Create a reference point (RP) and tie the rigid part to the reference point. Then apply the rotation BC's to the reference point. Hope the helps.
  4. Jlog50

    Advice for contact elements in Abaqus

    Thanks for your input Stig. I have heard that linear elements are better suited for contact problems? Do you have any thoughts on this? Thanks
  5. Jlog50

    Advice for contact elements in Abaqus

    Hello all, I am currently modelling 3D hertz contact problem in Abaqus. The manual does not give much advice on contact element types for contact problems. The contact is finite sliding (likely to be more than small sliding), penalty tangential behavious (COF = 0.1), "Hard" normal contact...
  6. Jlog50

    ASTM F75-07

    Hello all, I am trying to find the stress-strain data for Cobalt-Chrome 28. I have found th ASTM standard ASTM F75 - 07 Standard Specification for Cobalt-28 Chromium-6 Molybdenum Alloy Castings and Casting Alloy for Surgical Implants (UNS R30075). My organisation does not currently have...
  7. Jlog50

    Buckling due to residual stresses

    I am also looking into the area of work. You could model your materials as elastic-plastic, run a load step and relax step (repeat as many times as required), then assess the stresses. I look forward to input from others on this. All the best
  8. Jlog50

    Plotting nodal and elemental solution in viewpoint

    Hi corus, I seem to remember in ANSYS there was an option to view elemental and nodal solutions (like shown in this link below). I can't seem to see this type of option in ABAQUS, where can I find this? http://courses.cit.cornell.edu/ansys/plate/step08.htm Thanks again
  9. Jlog50

    Adaptive remeshing techniques

    Hi all, Yes I mean cubes. thanks for your advice I will try 2nd order tets and look at the accuracy of results. Thanks.
  10. Jlog50

    Plotting nodal and elemental solution in viewpoint

    Hi all, I can produce a report of the nodal and elemental stresses, but is there anyway of plotting a viewpoint plot of the nodal and elemental solution at a time increment. I would really appreciate some help on this. Thanks.
  11. Jlog50

    Adaptive remeshing techniques

    The only reason I preferred the hex elements, is because I am looking at a ball in socket joint which is round surfaces, therefore I felt hex may be a better option than tets?
  12. Jlog50

    Adaptive remeshing techniques

    Hello all, I am trying to learn more about remeshing techniques in FEA. I am using ABAQUS, and the programme does not seem to allow adaptive remeshing (i.e. mesh refinement) for 3D models using hex elements. Is this the same case for all FE software? If so, anyone know why this is? Is it a...
  13. Jlog50

    contact problem in Abaqus

    Optimus2007, yes, sometimes edges look flat even though you know that are perfectly round geometrically. Fabi0, when using penatly method to define tangential friction between surfaces, you mention you this allows for some overclosure. Can this be overcome by selecting to remove overclosure in...
  14. Jlog50

    Quasi static analysis error

    When trying to run a Quasi static analysis, I get the following error message: Machine precision requires a time step greater than 2.22000e-16 When I run this problem as a static and dynamic implicit analysis it seems to run without any errors Anyone know how to solve this. thanks.
  15. Jlog50

    contact problem in Abaqus

    Is this just a visual problem? Are you results strange? You could try to remove overclosure in the interaction module.
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