Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations MintJulep on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Recent content by PetieSmo

  1. PetieSmo

    Automatic Inflation Mechanism

    The relief valve or a backpressure regulator (with sensor for verification) should give you a good level of control and validation.
  2. PetieSmo

    Relating One Hole pattern to another hole pattern

    I admit I don't fully understand what your process is. It sounds like there are two options: 1) Locating the plates before the holes are drilled in Plate 2. If that is the case, this should be no big issue to align the plates, and locate the holes relative to the pattern on Plate 1. 2) If the...
  3. PetieSmo

    What to do when the code doesnÆt cover your situation? ASME B31.1 Power Piping

    Is the tie-in to the header intended to be a hot tap connection? Or will this be performed during an outage? If a hot tap is required, RT seems your only alternative while the system remains at operating pressures. However, if being performed during an outage or bypass, there may be...
  4. PetieSmo

    Inexpensive source needed for stock constant force springs

    Try http://www.ametekhunterspring.com They have stock springs available
  5. PetieSmo

    Angular bearing

    prym, How did you define your contacts? If you defined them surface-to-surface, then i wouldn't expect that message. If you defined your contacts as part-to-part, it's possible that contact definitions were created for other surfaces (e.g., the flat end faces). Seems like you're starting to...
  6. PetieSmo

    Angular bearing

    prym, Was on vacation for awhile - sorry i didn't respond sooner. One thing that pops out at me - there is no Z constraint on the outer race or any of the rollers - this could be the source of your constraint issues. Another possible issue - your load condition on the outer race is not truly...
  7. PetieSmo

    desire to not mesh using datum points

    Jim, I thought there was a setting to do this in an AUTOGEM control, but this is not the case. It certainly seems like an "easy" option for PTC to implement/provide for those who need it. The only other ideas I came up with were basically workarounds, similar to what you are already doing...
  8. PetieSmo

    Angular bearing

    prym, As with any FEA model, the challenge/trick is to appropriately constrain the model in space without influencing the result. I would suggest you begin with the simple radial bearing (cylindrical rollers), so that you can take advantage of planar symmetry. (You will not be able to use...
  9. PetieSmo

    Angular bearing

    prym, What are you trying to accomplish with your analysis? Are you trying to design/optimize the components sizes or materials? Are you trying to model behavior under dynamic loads? Are you trying to get a rough factor of safety or detailed deflections? Knowing your objective may help...
  10. PetieSmo

    Won't show the result ?

    fic, You might try hitting F9 or Ctrl+F9 (which is the 'Calculate' command in Mathcad) Peter
  11. PetieSmo

    Unknown Mechanical Device, identification help please

    Definitely a wild guess, but when I first opened the picture and thought about the wiper blades, I thought of candy molds (e.g., gum drops). Let us know if/when you find out.
  12. PetieSmo

    Protected Mathcad sheets

    Depending upon the level of protection, you may be able to add a new (duplicate) output of the result you're interested in & modify the decimal places on that. Good luck
  13. PetieSmo

    Open pipe, static pressure, jet reaction

    Have you applied displacement constraints to the pipe to prevent it from "flying away"? This could be a source of your instability.
  14. PetieSmo

    Cable Tension

    This problem will not be accurately modeled with beam equations. The deflection will be heavily dependent upon the tension in the cable. As mintjulep said, this problem is pretty well documented. Because of the force applied at midspan, the cable will not assume a catenary curve.
  15. PetieSmo

    Multivariable algebrain equations

    excognito, Great solution - I was not familiar with live symbolics 'til you showed it in your worksheet. Pete
See more

Part and Inventory Search

Back
Top