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  1. dragonix

    API 17f (ISO13628-6) clarification

    Hello Everybody, I need a clarification on a section of API 17F (ISO13628-6), par. 4.5.5.6, Flushing of SCSSV Hydraulic Circuit: Paragraph states: "Provisions for flushing the hydraulic circuit from control module to SCSSV during installation and in the operational phase shall be considered...
  2. dragonix

    Composite layers in Solsh190

    Hi, I'm trying to model a composite using Solsh 190. The composite is made of 4 layers of 0.25 mm each. My question is: if I model the composite with 3 elements across the thickness, how does ansys manage the 4 layers? (all the elements are across two layers) Does this lead to correct...
  3. dragonix

    Honeycomb aluminium sandwich

    You still have not stated what you want to get out of the model and what effects you are trying to capture. For example, why do you want to model the core at all? Do you want to capture the effects of transverse shear deformation or capture the facesheet wrinkling mode (or perhaps even...
  4. dragonix

    Honeycomb aluminium sandwich

    does "model the true core cells geometry" mean you're going to model the hex-cells? Yes, I would like to try. i suspect it'll work, but is sounds like a lot of work ? Unfortunately yes. surely the data's available on Hexcell's site ?? I will try to find it. Anyway, to define material...
  5. dragonix

    Modeling Water Tank Using Ansys

    You can create a contact between fluid and tank walls. In this way the contact act only if the fluid pushes against the tank and not viceversa
  6. dragonix

    Honeycomb aluminium sandwich

    I am using ansys to model it. Shell 91 is the 2d element with composite option. A good way should be (as rb1957 told) use 2d shells for plates (material: isotropic aluminium) and model core with 3D solid elements using an equivalent ortotropic model (i.e. out of plane young modulus >> than...
  7. dragonix

    Honeycomb aluminium sandwich

    Hi all, I have to model a honeycomb aluminium sandwich made of 2 sheets bonded to an honeycomb structure with ansys Now my problem is how to model it correctly. Reading around the web I found many techniques but the main are: 1) Model the sheets with shell elements and isotropic material...
  8. dragonix

    Loads on flanges

    I have this doubt: If the pressure acts radially, how can it generate an axial force? Only if the pipe is closed at one side (like a pressure vessel) an axial load can be generated by the pressure..or not?? This is my doubt!! I thought that the separation force can be evaluated using the fluid...
  9. dragonix

    Loads on flanges

    Hi, I have to dimension the bolts in a flanged joint. The flange connects two pipe section and in the pipes flows a fluid. My questions is: -the axial load which tries to separate the pipe sections how can be evaluated? Thanks in advance
  10. dragonix

    Subsea Pipes design and loads

    Hello everybody! Next week I have an interview for an Oil&Gas company for a Subsea Engineer role The role must be able to design piping and support structures and framework layout. Now, I'm trying to imagine the design loads and the main problems. Loads: 1) fluid pressure 2) Fluid and pipes...
  11. dragonix

    Plastic materials and FEM simulation

    Hi Guys! I'm working with plastic materials (such as Polyamide or PET) reinforced with glass fibers (from 30% to 50%) and I observed a huge difference between the material properties specified in the datasheets and the material properties calculated from lab tests. This is mainly due to random...

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