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  1. jerzy

    Using Adina with Femap

    Hello Thomas, I, too, have been a FEMAP user for many years and mostly use Advanced Nonlinear Modules 601/701, which are part of the ADINA program. I was dismayed to learn that solutions 601/701 will stop being supported by Siemens, and will be disabled in NX NASTRAN starting July 2020. I had...
  2. jerzy

    Design Standards For Rotomolded Underground Tanks

    In the May/June 2011 issue of Rotoworld magazine there was an article discussing proposed updates to AS/NZS4766:2006 for polyethylene storage tanks. I have not been able to discover if any of those proposals regarding underground tanks have been adopted. They seem very conservative to me...
  3. jerzy

    Merry Xmas and Happy New Year 2016 !!

    Dear Blas, Merry Christmas to you and your family and associates. We are thankful for all the help you impart. Best wishes for a great 2016. Jerzy
  4. jerzy

    Stress-strain output in NX Advanced Nonlinear

    Hello forum members, I use FEMAP and NX Nastran Advanced NonLinear (Sol 601). I have been experimenting with large displacement and large strain options and see in the documentation thst various measures for stress and strain are used in the element formulations (Green-LaGrange, 2nd...
  5. jerzy

    drop simulation

    Hello Rob, You will have to do a dynamic analysis with the velocity from the drop as an initial condition. I work on dynamic problems using Advanced Nonlinear modules (solutions 601 and 701, ADINA modules) because I have contact surfaces, but I think you can solve your problem with the...
  6. jerzy

    Involute spline connection FEA anlaysis?

    Hello 724napier, There is an excellent Master's Thesis by Justin Paul McGrath that you should be able to find if you Google "Analysis of Axial Load Distribution in a Spline Coupling". It has additional references cited also. I would attach a PDF but I am uneasy about distributing copyrighted...
  7. jerzy

    Involute spline connection FEA anlaysis?

    Hello 724napier, I have recently been analyzing hub-shaft torque transmission: interface pressure varies along shaft length which precludes 2D analysis. I could dig out some references if you care to look this up. Jerzy
  8. jerzy

    Femap 11.1 sometimes crashes analysis started.

    Hello forum members, I am running NX Nastran with Femap but I also have a NE Nastran license. The troublesome file also gave the Windows error when I tried solving the model using NE Nastran. It crashed the same way: immediately after clicking the "Analyze" button, before either NX Nastran or...
  9. jerzy

    Femap 11.1 sometimes crashes analysis started.

    Hello forum members, FEMAP 11.1 occasionally gives Windows error and closes when analysis (SOL 101) is started. This has happened to me on two different machines, one running Windows 7, the other XP, both 64 bit, with the same file. I then exported the file as a FEMAP neutral, Version 11.0.1...
  10. jerzy

    Shell Off-sets in NX Linear and Advanced Nonlinear Contact Analyses

    Hello forum members, I wanted to follow up my question. I submitted the problem to Siemens GTAC support and received a prompt reply: "The NX Nastran 8.5 Quick Reference Guide bulk data entry for CQUAD4 lists a remark as follows: Remarks related to SOLs 601 and 701: 1.ZOFFS is ignored." I...
  11. jerzy

    Shell Off-sets in NX Linear and Advanced Nonlinear Contact Analyses

    Hello Blas, Thank you for the reply. I had read the contact information from the Modeling Guide before posting my question and posted only after I could not get results that allowed for shell thickness and for shell offset from the meshing surface. I had run analyses using linear contact that...
  12. jerzy

    Shell Off-sets in NX Linear and Advanced Nonlinear Contact Analyses

    Hello forum members, I have been running test cases using shell-to-shell contacts where the shells are off-set from the contact surface. The NX linear contact solution 101 behaves as I expect: it will compensate for shell thickness and also for the shell offset using the Z-offset setting...
  13. jerzy

    Rotomolded Insert Pull Out Forces

    I am performing FEA on an assembly that includes rotomoldings with inserts. I have found some data for pull out forces for injection molded inserts but not for rotomolded parts. I am thinking of using the injection molded data reduced by a fairly large amount to compensate for different...
  14. jerzy

    Will Nastran NX use more than 4 processors?

    Hello Blas, Thank you for the quick and helpful reply. I also want to thank you for all the information you have supplied in this forum. I have learned much from you and always look forward to studying your replies. Best regards Jerzy
  15. jerzy

    Will Nastran NX use more than 4 processors?

    Hello forum members, I'm considering buying a new workstation. I use FEMAP and NX Nastran and often run non-linear Solution 106 problems. I was looking at the Dell 7600 with 8-core processors. (I currently use 4-cores.) Will NX Nastran use the 8 cores? I would probably get 64 Gigs of RAM...
  16. jerzy

    Checking cyclic symmetry BC with FEMAP and NE NASTRAN

    Hello forum members, I hadn't looked carefully enough at the text listing of the BDF file: I found the MPC listings in there. I had expected to import the BDF file back into FEMAP and see the listings there. I get an error when I import the BDF file, but I can read the MPC equations from the...
  17. jerzy

    Checking cyclic symmetry BC with FEMAP and NE NASTRAN

    I have been trying to find a listing of the constraint equations created when the CYSYMGEN command is added to my input files created in FEMAP. Most of the problems I've run with cyclic symmetry give reasonable results but sometimes results are far from what I would expect and I would like to...
  18. jerzy

    Type of element used in SolidWorks Simulation Express

    Thank you all for your insightful and quick responses. I suspected that 4-node tets were not used because the Express results would differ even much more than they do from my results. One key cause of the difference I think is that Express reports averaged nodal stresses rather than elemental...
  19. jerzy

    Type of element used in SolidWorks Simulation Express

    I often analyze models created in SolidWorks for which my clients have done a preliminary analysis using the Simulation Express program included with SolidWorks. Sometimes I am asked why our results differ if we both are using solid elements. Does anyone know what kind of tetrahedron element...
  20. jerzy

    Stress Relaxation In FEMAP with NASTRAN

    Hello forum members, I have been experimenting with creep analyses in FEMAP 10.3.1b with NASTRAN NX. I have been using very simple models to gain insight into how the program works. I create an analysis set in FEMAP and then use the "Preview Input" option to create two subcases with different...

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