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Recent content by JM_10

  1. JM_10

    Hand calculations vs FEM analysis huge difference

    @rb1957 Of course, I think my assumption was not clear I mean that I run the simulations with no pretension Meaning that results are not even realistic. When I put some pretension, stress will be much higher in simulations
  2. JM_10

    Hand calculations vs FEM analysis huge difference

    Hmm ok I will try to have some inputs about non liner analysis too About the bolts, yes I know about combining allowable resistance. It is in EN 1993,but it only considers sear + tension. Bending is not considered in bolts. Maybe I am missing that Yes, bolts are the only loadpath as faces are...
  3. JM_10

    Hand calculations vs FEM analysis huge difference

    @DenverStruct You are right, thanks for the information. I realized I need some inputs about how FEM mesh is working, that article has been useful! So thank you all for your answers. All of them have been useful I will redo the meshing process with detailed analysis attending mesh convergence...
  4. JM_10

    Hand calculations vs FEM analysis huge difference

    So I am designing some steel structure where exists a bolted joint The "cylinder" (total 11 tons), is joint by 20 bolts (M22 10.9 grade bolts) to the "frame" or beams (S275 steel, HE 180M profiles). The FEM simulation is predicting high Von Mises stress in the joints holes and the bolts...
  5. JM_10

    Tips for this structure I am designing

    Thank you all very much for your help.
  6. JM_10

    Tips for this structure I am designing

    @drawoh @rb1957 Thank you for your answers About contracting this out, initially the company is not considering it. However, we have time to learn some inputs and develop this carefully So, Yes, 1 is braced and 5 not, but not for particular reason, we just thought it would not be needed, as...
  7. JM_10

    Tips for this structure I am designing

    Hello all, I need to design an structure which is able to support a cylinder loaded with 10 tons of weight distributed around its external face The current model is the one you can see in the pictures. A FEM analysis has been carried out using "Simscale" and this is the result. I would...
  8. JM_10

    Is this bolted joint appropriate?

    Hello @desertfox That´s great. Thank you very much! It will be so helpful
  9. JM_10

    Is this bolted joint appropriate?

    You have been so helpful, I will note about this. Thank you very much
  10. JM_10

    Is this bolted joint appropriate?

    Ok, thank you very much for the advice By "siamese" you mean diameter? Also, do you know any reference where I can check the rule? (not that I do not trust you, it´s because it will be documented If possible) Thank you!!
  11. JM_10

    Is this bolted joint appropriate?

    Right, that is why I did not show in the first time Basically my concern is about making the holes in a "so thin" sheet. I am not aware about "how big" can it be with no compromising the material
  12. JM_10

    Is this bolted joint appropriate?

    Hello, thank you for your response Of course, The idea is to create a steel support (blue) in a ring shape, containing lead blocks (grey) inside: https://imgur.com/a/tJCNU Total lead weight estimated is 14 Tons, while the ring middle radious is 1,125 m Several analysis returns that the...
  13. JM_10

    Is this bolted joint appropriate?

    Hello, We are designing an steel curved structure with a rectangular opened section, please see images. It needs to be able to be opened for maintenance purposes. So, the joining of the different sheets which form the curved beam have to be bolted. My question is how big can be the hole, so...
  14. JM_10

    How can I solve this structure?

    Ok then, I will be using the two vertical loads So about the stability issues. Do you know how could I work on it? Thank you
  15. JM_10

    How can I solve this structure?

    Thank you for the help Well, actually FEM simulations seems to be ok (70 Mpa Von Mises), so yes it looks robust. https://imgur.com/a/9K8c6 Also, we will think about the outside supports However, we also want to make the manual calculations. So prex, thank you, I will look at it carefully...
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