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  • Users: Chrissy123
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  1. Chrissy123

    ABAQUS CFD verification with Darcy Pressure equation

    Hello - can anybody help me on this please ? I am modelling a simple cylinder with laminar flow in ABAQUS CFD. I am using Reynolds number of 25 to simulate laminar flow with an inlet velocity of 1m/s using a fluid with density of 1 and kinematic viscosity of 0.012. I have worked out the length...
  2. Chrissy123

    Darcy Pressure Drop Equation and CFD validation

    Hello - can anybody help me on this please ? I am modelling a simple cylinder with laminar flow in ABAQUS CFD. I am using Reynolds number of 25 to simulate laminar flow with an inlet velocity of 1m/s using a fluid with density of 1 and kinematic viscosity of 0.012. I have worked out the length...
  3. Chrissy123

    Flat head thickness calculation - cylindrical pressure vessel.

    According to ASME there is a calculation for flat head thickness (t) with the equation shown below. Is this applicable regardless of the ratio of head thickness to cylinder thickness ? I have a pressure vessel where the shell thickness of the cylinder is 100mm and the head thickness is 10mm...
  4. Chrissy123

    Perfectly plastic material

    If a material if perfectly plastic then does this mean that the UTS is effectively the same as the yield stress ? Thanks
  5. Chrissy123

    Limit Load Analysis - internal pressure

    Hi - I am modelling a cylindrical pressure vessel. I have carried out a mesh convergence study for smaller pressure loads so I'm happy with that. The material is elastic perfectly plastic. what I need to do now is apply internal pressure and find out what pressure would cause the vessel to...
  6. Chrissy123

    Back to basics calculation for ASME Pressure Vessel with Flat Head

    Hi all - I'm going back to basics with my pressure vessel analysis and starting with ASME to calculate the acceptable operating pressure of a pressure vessel. My model is simple - flat head cylindrical. Length of cylinder 500mm, inside radius 254mm, cylinder shell thickness 100mm, flat head...
  7. Chrissy123

    ABAQUS FEA of Pressure Vessel - plastic collapse

    I have written an FEA model for a flat head pressure vessel,the head thickness is a lot less than the main body and it's a simple cylinder with a flat head, no valves etc. The FEA simulation is elastic-plastic; I believe I am meshing to a fine enough level as I have done convergence models etc...
  8. Chrissy123

    Simple closed flat end Cylindrical Pressure Vessel Collapse Calcuation

    Hi - I am trying to calculate the maximum pressure (or the pressure that would cause collapse of) a simple closed end cylinder. The cylinder thickness is 100mm however the end caps (which are flat) of the cylinder are 30mm. So I have two different thicknesses to consider. I've searched an can't...
  9. Chrissy123

    Morison's equations for drag and inertia force

    Hi - I know that I can determine the coefficients for Cm and Cd using Keulegan Carpenter number but I have seen these equations for a Morison derivation of C and Cd - please see picture below - I'm an unsure though what is 'F' in the equation - what do I use for this please ? thanks,
  10. Chrissy123

    Calculation of dynamic pressure, inertia and drag forces for offshore riser

    Hi - I'm trying to calculate dynamic pressure, inertia and drag forces for an offshore riser that is connected to a submersible at the SWL. I have all the data that I think I need, wave period, length, amplitude,height, and I have calculated wave number (k) and wave speed (celerity) s..The depth...
  11. Chrissy123

    How to find collapse pressure of a pressure vessel

    Hi - I am modelling a flat head pressure vessel and I am writing a script to vary the thickness of the head of the pressure vessel. I have managed to do this but I now need to determine what is the pressure that causes the pressure vessel to collapse. How do I determine this please from the...
  12. Chrissy123

    ABAQUS 3 point bend model

    Hi - I am simulating a simple 3 point bend model in ABAQUS. It's for a sample steel specimen so the dimensions are 400mm long, 25mm wide and height of 44. The span of the supports is 300 mm. I have successfully managed to get a good load/displacement plot using Static General analysis, but I'm...

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