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Recent content by jxc

  1. jxc

    CFdesign vs NEi Fluid Flow products

    I am in the process of reviewing CFD products and CFdesign and NEi Fluid Flow solver w/ Thermal solver are the products. Does anyone have experience with either or both? I would like to hear pro/con viewpoints of each nothing elaborate, what has the product not been able to solve. Are there...
  2. jxc

    Proper Element Choice

    These are all good insights, please let me add mine. I have worked with a lot of thinwalled tubing and sheet metal products that do not lend themselves to using solid elements, but rather shell elements. A rule of thumb for when to use shell vs solid elements? Try 10:1 ratio of the surface...
  3. jxc

    Calculating force required to seat self tapping thread?

    No, the driver is a pneumatic driver and the holes are drilled using equipment that welds and drills these holes and others on a dialed mechanism, then components are fixtured, location and depth is controlled. The tolerances the controls are based on may require review.
  4. jxc

    Calculating force required to seat self tapping thread?

    Kenneth (have a hard time addressing someone cockroach), nice suggestion. Force is what I am after, the theoretical value in particular. Operators have been compensating by pushing down on the driver, I think some earlier addressed that issue and training operators on what to expect the driver...
  5. jxc

    Calculating force required to seat self tapping thread?

    I appreciate the input, unfortunately my plant is on a holiday break I will have the pertinent info. tomorrow. I would like to address the comment on design. This application is on a small magnetic motor armature and this tap is spot welded in place and holes drilled for the self-tapping...
  6. jxc

    Calculating force required to seat self tapping thread?

    At this point I feel that is not a true assumption. We have increase the torque on numerous occassions and continue to hit and miss seating the screw. But, B I will use your trial and give an update regarding the results.
  7. jxc

    Calculating force required to seat self tapping thread?

    Evening, My general question to the forum is stated in my title. I am using a self-tapping thread to hold a to objects. One has a clearance hole and the thread is cut into the 2nd piece. I am having issues seating the screw properly and require more than one attempt. I work in a high volume...
  8. jxc

    Material Properties to simulate a seatbelt.

    Ladies & Gentlemen, I have subscribed to this forum for a while & would like first to say congradulations on all the well thought & insightful responses. I have a fair amount of FEA experience & some questions are elementary for me, but the overall responses are very respectful. Thank you...
  9. jxc

    MPC_RBE2 vs. FASTENERS SIMULATION

    Remember the RBE2 MPC will be infinitely stiff and will create local stress/strain concentrations. Take these into account when you interpet your results. Jxc
  10. jxc

    MD NASTRAN

    Hansm2 is correct, MD Nastran is the latest release from MSC Software. MD Nastran includes the updated Patran interface I believe. If cost is an issue NE/Nastran is an excellent choice, but also consider your production needs for FE analysis, your requirements for nonlinear, contact, dynamics...
  11. jxc

    FEA corelation

    Try using principle stresses or shear stress results in your correalation. I have found these to be more reliable source. Good Luck...
  12. jxc

    Cosmosworks for Solidworks 2000

    Israelkk, The easist way to answer that question is to contact a solidworks rep or use the website http://www.solidworks.com. I am sure there is with that version of solidworks, most likely named the same. Good luck, jxc
  13. jxc

    quad elements posing as triangles

    Corus, I am sorry for this late reply & I hope your question is answered, but when this has occured in any of my analysis an element check will locate these elements &/or the analysis will fail with a message hinting (solver messages are never direct) the problem. I use FEMAP & CAEFEM...
  14. jxc

    General FEA User group.

    MLeow, Sorry for not replying earlier. Vince & I are old friends & actually developed a group earlier, but situations in both of our lives changed & the group was forced to go the way of the "Dodo". I will take your advice at see if Vince has any interest in such a group again. jxc
  15. jxc

    Carbon fiber in FEA

    I use FEMAP & though I do not have a lot of experience with un-isothropic material, FEMAP does allow for your material input as candychan describe. I would try my manual & online help also a resources for help. jxc
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