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  1. Tegguy

    ANSYS: Beam Elements vs Joint Stiffness?

    I'm going to apologize up front as I am not an ANSYS or an analysis expert by any means but there is some churn within our department about handling joints and I'm hoping someone can educate me. We have a bolted joint with a fastener, washer, and helicoil. The fastener is a #6 (.138) and the...
  2. Tegguy

    Surface Roughness

    Does anyone have any recommendations on how to communicate surface roughness for bonding? Normally I'd just say something like "abrade surface using X grit" however, in this instance I cannot since it's optics I would rather just communicate a target minimum roughness. I have talked to the epoxy...
  3. Tegguy

    Changing Scale with views?

    I can't find it in Y14.100 so I thought I'd ask here... Is it acceptable to change the scale on a projected or section view as long as you put the scale below the view name? I've never done this but a co-worker is asking me if he can do it on a section view (not a true projection in this...
  4. Tegguy

    Vibration and Shock Analysis

    First I will appologize I'm far more a mechanical design engineer than a stress analysist at this point in my career so I'm probably going to phrase stuff wrong. I'm also not completing the analysis but am helping on the design side. When a model analysis is competed you end up with a list of...
  5. Tegguy

    Creep in 3D printed Nylon

    I am hoping someone might have some knowledge that can help me out. I am a Mechanical Design engineer tasked with solving a problem with an existing design. We have a set of grown Nylon 12PA parts that get bolted together with an O-ring between them. We have heatsert's in the base with a #6...
  6. Tegguy

    DRF Change Impact Example

    I have been a design engineer for ~10 years now using GD&T almost daily. I have recently started a new position with a younger team and have noticed a lot of DRF changes to make the pierce surface the primary datum for holes. This is obviously causing a lot of useless datums to be generated as...
  7. Tegguy

    Air Flow Through a Pipe/Valve

    Ok I hope I'm posting this in the correct location. I have a project that involves an aircraft ECS (environmental control system) which supplies an unknown quantity of air at between .5 and 14.7 PSIG at temperatures from 0=35 Degrees F. I am only allowed to use 1.59 Lb/Min of air at any given...

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