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  1. dlybbert

    Thread Load Distribution

    Excellent thought rb1957, but it doesn't work either. They all round off to "1", and give me a final answer of -14. I have attempted to contact the authors, but they haven't got back to me. "If it has been done... there is a better way."
  2. dlybbert

    Thread Load Distribution

    Alright. I have a problem with equation #10 from "Loading Analysis on the Thread Teeth in Cylindrical Pipe Thread Connection" (2010 Journal of Pressure Vessel Technology). I have attached an image of the equation, and their sample calculation. The "In" I assume is a natural logarithm. But I...
  3. dlybbert

    Shrink Fit Failure

    I am always really hesitant to use online calculators. I remember one that converted 1 ton to 64400lbs (2000*32.2). Remember that they may or may not be anywhere near close. That being said, this one looks pretty good. The symbol is a small "delta", and as best as I can tell, denotes the...
  4. dlybbert

    Thread Load Distribution

    There is another paper (I found the paper copy around the office, but I can't find an online version) called "Loading Analysis on the Thread Teeth in Cylindrical Pipe Connection" By Shou-Jun Chen and Qi An (2010) in the Journal of Pressure Vessel Technology, that is a bit more involved, but...
  5. dlybbert

    Thread Load Distribution

    desertfox, That was a good read. I may be able to show that this data can (at least somewhat) extrapolate from square and buttress threads to ACME and stub ACME connections. I am surprised that so much load is borne through only 2-4 threads. "If it has been done... there is a better way."
  6. dlybbert

    Thread Load Distribution

    I am designing a stub acme connection, and in this case, I will be pushing its limits more than normal. I am looking for any information about load sharing between threads for 2g or 4g threads. I have read in some more basic books to use two threads with equally distributed loads, but from my...
  7. dlybbert

    Sheet Print Configurations Keep Changing

    I have been using Draftsight for a while now, and all of my drawing sheets are set up to have particular print configurations. For some reason, my newly created sheets will not maintain the specified configuration but go back to "none" whenever I restart Draftsight. The older pages will maintain...
  8. dlybbert

    Paper is not at 0,0

    I just rotated a letter paper in paperspace to be portrait, but the bottom left corner is not at 0,0. I cannot figure out how to get it where it is supposed to be. I am using the newest release of draftsight on Windows 7 if that makes any difference. Has anybody ever had this problem before...
  9. dlybbert

    API hieght requirements for land rigs

    I seem to recall reading something about a maximum height for a land drilling rig, above which a dynamic structural analysis must be done. I cannot now find the reference. Does this ring a bell for anybody else? "If it has been done... there is a better way."
  10. dlybbert

    Ansys Figures in Gnerated Report

    I do use windows 7, but I did change to windows classic (that disables aero, but I'm not sure if it is "off" enough). "If it has been done... there is a better way."
  11. dlybbert

    Ansys Figures in Gnerated Report

    When I make a generated report, sometimes (but not always) the figures of the deformed body are covered by a grey figure of the undeformed body (as shown in the attached figure). What is the deal here? How do I make it so there is not the grey body covering the results. Thanks for your time...
  12. dlybbert

    Allowable Stress

    I am designing a jacking roller. I am trying to find information for allowable rolling stress for materials (specifically A514 steel). Does anybody know of a reference that would contain it, or a procedure for calculating it? Thanks.
  13. dlybbert

    Mathcad Max of a function of a function

    That is excellent! Thanks for the help.
  14. dlybbert

    Mathcad Max of a function of a function

    I am trying to find a maximum of a function that calls up a function. I just can't get the syntax correct for the maximize function (I can when using it for a function of single level variables though). I have attached the file as MathCAD 15.0, and 11.
  15. dlybbert

    Fan Pressure Range

    I am looking for a high pressure/high output fan for a new R&D project. It has been a long time since I have dealt with fans. Many fans that I am coming across are giving a "Static Pressure Range =~ 300 in.wg", but then the spec sheet gives a static pressure of 5 in.wg. What is the difference...
  16. dlybbert

    Using values from a given/find solver block

    OK, I don't know why it works now, but it does
  17. dlybbert

    Using values from a given/find solver block

    Here it is saved as V11. http://files.engineering.com/getfile.aspx?folder=36f0d76f-cc2e-45e5-a3b5-b2da236adf20&file=Question.mcd
  18. dlybbert

    Using values from a given/find solver block

    Mathcad users, I have been trying to figure out how to store the values from a given/find solver block into some sort of usable array for use in later calculations. I am fairly new with mathcad, and using mathcad 15. The code is attached. Thanks for your help.

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