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Recent content by jazzmine

  1. jazzmine

    linear buckling / strand7

    Thank you.
  2. jazzmine

    linear buckling / strand7

    I need your advice about combination of compression and bending. What is your opinion about restraints, should I leave them like for bending? I made two models, first one with the restraints like for compression and second one like for bending. For first model, Mode 1: buckling load factor is 0...
  3. jazzmine

    linear buckling / strand7

    I apply bending as you said. I guess that I should multiply bucklig load factor with 0,5 MPa ? If I calculate stress ratio with formula which is given in Roark`s table (15.2.3), I get α=0,5 for bending. So I shoud compare my results with the first line in that table. Can you give me your...
  4. jazzmine

    linear buckling / strand7

    Ok. Thanks for your advices and help!
  5. jazzmine

    linear buckling / strand7

    I am afraid that I did something wrong again beacause, when I apply the load, I get at the top -4,025*10^3 edge pressure and at the bottom -4,975*10^3, as you can see in the model for bending . And not as you said. And I have not found how to calculate buckling stress in this case. Can you help...
  6. jazzmine

    linear buckling / strand7

    The problem is that I have to apply just bending moment like on a picture that I post. The stress ratio ψ must be equal -1 for pure bending. Do you have other idea how to apply just bending moment? Is it possible to apply rigged load in Strand7 and how? I assumed that the buckling stress I...
  7. jazzmine

    linear buckling / strand7

    Can you give me some suggestion how to apply, to the same model, bending moment (pure bending) and combination of axial compression and bending moment? And how to calculate buckling coefficient in that cases? I supposed I should compare the results with the results in table 15.2.3. Thanks!
  8. jazzmine

    linear buckling / strand7

    I did what you said. Thank you very much for help!
  9. jazzmine

    linear buckling / strand7

    Here's second model. http://files.engineering.com/getfile.aspx?folder=bc557617-b516-4826-ad51-2611ac5e1fbf&file=Mesh1.st7
  10. jazzmine

    linear buckling / strand7

    This is a plate without hole and I will post you a perforated plate to see. I am not good in this program and really don't know what is the problem, so thank you for helping! http://files.engineering.com/getfile.aspx?folder=d192397f-5ed1-43c3-9ede-06d6c2177d5a&file=Mesh2.st7
  11. jazzmine

    linear buckling / strand7

    This is the buckling load factor that I get for the first mode (the plate without hole) : 8.02018644E+00 .
  12. jazzmine

    linear buckling / strand7

    Helo! I need help with the model. I can not get the buckling coefficient k=4 for a simply supported plate. If I multiply applied load with buckling load factor I get k=7,7. I made model in the following way : - I open the dialog box MODEL UNITS and select units ( m, kg, J, kPa, kN, K) - I...
  13. jazzmine

    linear buckling / strand7

    Does anyone know how to apply bending moment directly to the nodes of plate in Strand7? Thx!
  14. jazzmine

    linear buckling / strand7

    Hi! More questions. What does it means if I have negative buckling factor ( 1st eigenvalue is negative)? I read that a negative buckling factor means that the structure will buckle when the directions of the applied loads are all reversed and if loads cannot be reversed,the negative load...
  15. jazzmine

    linear buckling / strand7

    thanks :) I will try to make what you say.. if I had any other uncertainties i will send you questions. THX!
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