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  1. wes616

    What is an INR hole?

    What you are hearing at INR is actually I and R or I'n'R for Interchangeable and Replaceable. Wes C. ------------------------------ No trees were killed in the sending of this message, but a large number of electrons were terribly inconvenienced.
  2. wes616

    Best Fit Line

    I have three points projected onto a plane and would like to best fit an infinite line using these points. Is there a way to do this in V5r18 Wes C. ------------------------------ No trees were killed in the sending of this message, but a large number of electrons were terribly inconvenienced.
  3. wes616

    What is the most widely used software for Composites design?

    Here is the basic flow where I work. The geometry for composite parts is typically just the surfacing package of your CAD program (Catia GSD). The analysis is then performed in some CAE package (Ansys) and the actual layup and stacking sequence is determined. This information is then fed back...
  4. wes616

    How to remove air bubbles from prepreg panels

    First and foremost, it sounds like you are pre-stacking your plies, then laminating your mold with the pre-stacked plies. THIS IS BAD PRACTICE!!! and if this is what you are doing, you should see a considerable decrease in the phenomenon you are describing. If you are not pre-stacking and I...
  5. wes616

    Good practices for best structural properties w/o autoclave (???)

    Assuming you are using an out-of-autoclave prepreg, for a flat panel, use a vacuum bag and a caul plate. You'll be just fine. Wes C. ------------------------------ No trees were killed in the sending of this message, but a large number of electrons were terribly inconvenienced.
  6. wes616

    Good practices for best structural properties w/o autoclave (???)

    Atmospheric pressure works pretty good. Wes C. ------------------------------ No trees were killed in the sending of this message, but a large number of electrons were terribly inconvenienced.
  7. wes616

    NDI - Tap Testing

    Take a hammer.... wack hard enough to create a delam. Scrap part. Seriously though, tap testing can only find large voids and delams. When it comes right down to it, these are usually quite obvious. It's essentially like tapping your drywall with a small hammer to find a stud. Wes C...
  8. wes616

    Airbus Documentation Question

    By frame spec, do you mean shape profile or do you mean material spec. I believe that you can find them both within the released engineering documentation on the site. Airbus is pretty good at providing documentation for their product, unlike their competitor. Wes C...
  9. wes616

    Masters in Metallurgy

    Also look at New Mexico Tech. Wes C. ------------------------------ No trees were killed in the sending of this message, but a large number of electrons were terribly inconvenienced.
  10. wes616

    Productivity improvement

    I would also add that each individual engineer performs a greater volume of tasks as compared to even a few years ago. Yes all these tools you mentioned mean each of us can get more done faster. In lieu of increasing the overall volume of work tasked to a group of engineers, management instead...
  11. wes616

    Insert Pull Out

    Most data is proprietary and backed with test programs, like SWC said, matching material (panel type and insert type) and and potting adhesive. Please be careful when using published data for "insert pull strength/allowables" found on the internet (even if backed by a regulating agency) because...
  12. wes616

    Client Vendor relationships

    Great link on Evolving Excellence (from Fashion Incubator original hat tip) about vendor-customer relationships. How does your company deal with customers demanding more for less? http://www.youtube.com/watch?v=R2a8TRSgzZY Wes C. ------------------------------ No trees were killed in the...
  13. wes616

    Standard mechanical tests for laminates

    SRBP - Special Really Bendable Plastic? - Saturated Red and Blue Pigments? - Standard Reinforced Black Pieces? Wes C. ------------------------------ No trees were killed in the sending of this message, but a large number of electrons were terribly inconvenienced.
  14. wes616

    Looking for a composite material

    Isn't tempur pedic a closed cell foam? Wes C. ------------------------------ No trees were killed in the sending of this message, but a large number of electrons were terribly inconvenienced.
  15. wes616

    Material Property for NL 610-10777-375

    Nordam should provide the data to you. Wes C. ------------------------------ No trees were killed in the sending of this message, but a large number of electrons were terribly inconvenienced.
  16. wes616

    Mil-Hdbk 17 Queries

    Beware of using manufacturers data. Samples are fabricated in an ideal lab environment, and are usually more "defect free" than comparable samples from a manufacturing environment. Additionally there may be process variation based on your structure, tooling and equipment that will invalidate...
  17. wes616

    Effects of UV on epoxy composite laminates

    Most of the literature is directed at long term exposure of laminate to environmental conditions. The UV affect on your laminate should be negligible for a few days of exposure; however, the secondary surface heating affect could cause problems. There are several curves you can find online...
  18. wes616

    Surface finish using resin infusion process

    Markoff from the tool surface is typically a function of the quality of tool surface itself. Try to improve the tool surface and see if you experience less markoff. Regarding pinholes. I haven't seen this problem much with infusion processes (Out-of-clave prepregs are notorious for this...
  19. wes616

    Looking for a threaded insert.

    I assumed sandwich insert Wes C. ------------------------------ No trees were killed in the sending of this message, but a large number of electrons were terribly inconvenienced.
  20. wes616

    Looking for a threaded insert.

    Try NAS1832-5-750 close but is .3125-28UNJF Wes C. ------------------------------ No trees were killed in the sending of this message, but a large number of electrons were terribly inconvenienced.

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