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  1. oelindoe

    Casting Requirement ASME VIII-div2

    Thanks Gr2. So in order to make the housing VIII-Div2 approved, i must use a material listed in sect.2-tableD. There are no exceptions to this rule ? Another question.. Is it possible to define a code break for an assembly. i.e we keep the internal flowspool on Div2 while using a less strict...
  2. oelindoe

    Casting Requirement ASME VIII-div2

    Hi guys. Im a novice to the ASME calculations and during a current job i've run into some problems... Hopefully someone can advice :) Im doing a subsea flowmeter which consists of a inner venturi spool with various sensors. In order to protect the flow sensors electronics, an external housing...
  3. oelindoe

    Bad readings for a strain gauge on a pipe

    Looks like the hoop expansion of the pipe gives a lot of contraction in axial direction thus messing up the strain readings. I need to add an internal pressure driven function in the software to compensate. So the resulting reading will be a kvasi measured/theoretical value :(
  4. oelindoe

    Bad readings for a strain gauge on a pipe

    Hi guys. Im performing strain gauge readings for a heavy walled 4" pipe now. There is one gauge for axial strain and one for hoop strain. The gauges are mounted on the outside in a non-pressurized area. The gauges are set in a half bridge with a dummy gauge as a temperature compensator. When...
  5. oelindoe

    Strange Pressure Testing Results

    Last update. The "normal" pressure test setup has shown that its not possible to get any decent readings due to the small volume and large pressure variations over time. The test is now completed using a He sniffer and all is fine. The clamp was tested to 450Bar which gave a visible leak due to...
  6. oelindoe

    Strange Pressure Testing Results

    One last thing i forgot to include: The results are varying a lot with workshop temperature and all temperatures are logged over 4 days to give a trend curve which shows a slowly dropping pressure. "ZDAS04" - The clamp is 800mm long mounted over a pipe with both radial and longitudinal seals...
  7. oelindoe

    Strange Pressure Testing Results

    The test performs equally "bad" with and without internal pressure. Buckling is not a problem. The test is conservativly performed up to 400Bar external pressure. The effectice clamp lenght is 400mm with "buckling support" on both sides.
  8. oelindoe

    Strange Pressure Testing Results

    Hi all. Not sure if this is the right group.Here it goes: Im currently involved in pressuretesting of a repairclamp which is mounted over a pipe. During pressuretesting with water at the volume between the clamp and pipe, there is a continous small pressure drop over time but no visible leak...
  9. oelindoe

    How to set the stress 0 temperature from ANSYS thermal result

    Hi Funny. I have done something simular in another job. Look at this example i got from another guy: Brgds !--snip !solder material property fini /clear /prep7 length=10 blc4,0,0,length,.1 blc4,0,.2,length,.05 blc4,0,.25,length,.05 blc4,.45,.1,.1,.1 blc4,.5*length,.1,.1,.1...
  10. oelindoe

    How to set the stress 0 temperature from ANSYS thermal result

    Hi So the temperature profile goes from like 100-200 DegC along the part and all of it should be stressfree ? I think u have to provide better info on this ? brgds
  11. oelindoe

    How to set the stress 0 temperature from ANSYS thermal result

    Hi I think u have to set TREF and TUNIF to the same temperature which should be stress free in LS1. Then change TUNIF to room temp (or BF). Eq: /solu tref,200 tunif,200 solve tunif,20 solve brgds
  12. oelindoe

    How to apply one step result as next step initial conditions

    Hi. U can do it 2 ways: 1: read,file.ist (apply loads) solve apply loads solve ..and so on if u are doing it the batch way. 2: read,file.ist (apply loads) save LS1 Apply new loads Save LS2 solve LS files.... Brgds
  13. oelindoe

    How to apply one step result as next step initial conditions

    No, i dont think so. As i can see its only the nonlinear part missing. Normally i just add loads , save LS , solve current LS, Apply new loads , save , solve.... Do u get any error message ? btw. The new Workbench9 offers stepped analysis too. Easier to setup...
  14. oelindoe

    How to apply one step result as next step initial conditions

    Just run a 2 stepped analysis. LS1: First step Apply forces whatever ALLS SOLVE LS:2 Change Mat.Properties MPDATA,EX,,,, MPDATA,NUXY,,,, ALLS SOLVE The mat.prop change is not an approved strategy but works fine by me. If its a large analysis u can save restart info and start with whatever...
  15. oelindoe

    Adding parts to analysis

    Is it possible to add new parts to a stressed/deformed shape in ansys ?. Problem: A clamping structure bends around a pipe and a weld has to be made after the clamp tightend up. Current solution with ekill-ealive/upcoord/Low E modulus proves good results but still a lot of problems with the...
  16. oelindoe

    Plastic Hardening data

    Hi. Anyone who can provide typical bilinear or multilinear data for ST52 steel?. brgds OddEinar
  17. oelindoe

    Winch drum & flanges thickness

    Thanks a lot guys. Down to approx 3mm now,hehe only size of flanges missing now brgds
  18. oelindoe

    Winch drum & flanges thickness

    How do i calculate the thickness of the drum & flanges on a winch drum ? Lenght 1,5m , D=1,2m , wiredia=32mm , flangedia=1,8m linepull=48MT= 480000N I tried to apply the DNV rules but got a 14cm wallthickness on the drum.. overkill or not ? brgds odd from norway
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