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Recent content by jotunn

  1. jotunn

    NAS fastener distributors

    I'm reminded every 15 Apr. about the cost of ASSIST... (thus the quotes around profit... [glasses])
  2. jotunn

    NAS fastener distributors

    Yes. And AIAA (NAS) is not DOD and is not free.
  3. jotunn

    NAS fastener distributors

    Also...regarding QPL's... Does AIAA (copyright holder of NAS specifications) actually maintain QPL's? I know some consensus standards organizations do...like SAE for AMS... But I'm not actually familiar with AIAA doing so. I would also venture to guess that even if AIAA maintained QPLs, you...
  4. jotunn

    NAS fastener distributors

    JB: I'm assuming you've tried all the "big" players. Here's a smaller, local to me, manufacturer that you might have some luck with. FYI: their website is showing NAS1956C13 in stock (qty. 108) and NAS1954C10 in stock (qty. 8). I can't comment on website accuracy. Good news is they're a...
  5. jotunn

    Defining FEMAP Material Orientations for Curved Shell Model

    SW and RB are correct. To visualize in Femap, View>Options: To understand how material orientations are defined/applied in Nastran, check your quick reference guide:
  6. jotunn

    Website for accepting payments

    So...a digital escrow service? I can't recommend anything specific...but a quick internet search with those terms yields many options (even setting aside those specific to real estate transactions).
  7. jotunn

    Need Data Acquisition for Pressure, Sound, and Vibration of pneumatic hand tools

    Hardware vs. software. Hardware: MintJulep is on it...What do you want to measure? What resolution do you want to measure it at (both ADC resolution and sample rate)? We cannot answer this for you. Once you define the parameters, recommendations will be easier. Certainly, NI is on the...
  8. jotunn

    Deterioration of Joint Capability for Low Edge Distance Hole

    You've hit the standard caveats...test...change in failure mode (i.e. shear-out)...etc. Those stipulations aside, for a "ballpark understanding": CMH-17, Volume 1, Chapter 2 (section 2.3.5.5.4 in Rev. G) has a decent discussion on shear-out strength vs. "bearing" strength (bearing in quotes...
  9. jotunn

    where's the formula defined ?

    Didn't know that shortcut. Thanks!
  10. jotunn

    where's the formula defined ?

    Oh yeah...not on by default. File > Options > Customize Ribbon
  11. jotunn

    where's the formula defined ?

    rb: Developer tab. Visual basic.
  12. jotunn

    Magneto design.

    1. That's an unfair characterization of Elliot. 2. The TWERP program (Quickie with turbines) isn't the test program RoarkS is referring to. Suggest you look at the Titan Mustang program...perhaps it'll help you with context (and maybe even change your opinion about Elliot's abilities).
  13. jotunn

    Autoclave Processing - Vacuum Drop During Ramp

    I've seen what sounds like similar things...multiple jobs/places. Example below is out of autoclave (oven cure, prepreg under bag)... Initial vacuum drop (green oval in photo) during first temperature ramp which recovers, I believe to be moisture related... Moisture in the nylon bag, nylon...
  14. jotunn

    Metal analysis using SEM of metal object

    I'm a little confused by the question. There are quite a few labs that'll do SEM work... SEM/EDX perhaps more appropriate to your case... Element and Intertek are a couple of larger (multiple locations) labs that could likely support this type of work. Is that what you're looking for...just...
  15. jotunn

    Balancing Warp and Weft Face

    Interesting. Any idea as to why this might be? <edit: specifically, "this" meaning the difference between glass and carbon> I've not thought about it prior to now...but...fiber properties? Glass fibers being isotropic and carbon fibers being anisotropic (transverse isotropy if I'm not...
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