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  1. BeardedBob

    PC locks up running large jobs

    Thanks for the responses, comments and a progress update: Danstro - We did suspect Kaspersky scans or automatic updates, but we've unplugged the network cable and turned Kaspersky off and the problem still occurs. Power management etc. is off as well. Johnhors - Interesting thought, might be a...
  2. BeardedBob

    ABAQUS Pipe Elements

    They are specialized cylindrical beam elements which have internal and external pressure as additional loads. Hoop strain is an additional variable as a result. Note that according to the manual they assume a closed end condition so there will also be an axial strain generated by internal...
  3. BeardedBob

    PC locks up running large jobs

    Does anyone have any thoughts on why we are experiencing machine lockups with large Abaqus jobs? When running large jobs the PC will freeze and has to be switched off and re-booted. Apart from the loss of the job, it then takes 6 hours or so to check the RAID array. Simulia can see no...
  4. BeardedBob

    Polyethylene piping pressure testing and creep

    The UK Institution of Gas Engineers and Managers (www.igem.org.uk) standard TD/3 gives some limited guidance on pressure drops and creep effects in the testing of PE pipe, although no equations. It's possible your progam might be based on this. Bob Andrews www.fleetech.com
  5. BeardedBob

    Accounting for Static Head for Hydraulic Vessel Testing

    roca, The t/(t-c) term in PD 5500 increases the test pressure to allow for the presence of a corrosion allowance in a new vessel. "t" is the nominal thickness and "c" is the corrosion allowance. The scope of PD 5500 is new construction, although the note to 1.1.1 does allow you to use it to...
  6. BeardedBob

    Fittings Corrosion and B31.G

    Unfortunately in my opinion you shouldn't do this. The B31.G method was based on tests and modelling of straight pipe loaded by internal pressure, giving a fairly simple stress pattern. Fittings have more complex geometries and stresses and will often have significant external loads which the...

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