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  1. taoofeng

    Limit of Validity of Structural Idealisation

    As long as you're talking rule of thumbs, here's another one. If the h/t > 100, it is a "thin-webbed" beam and the bending load goes into the upper and lower caps as a couple and the web takes only a shear load. If the h/t < 100, it is a "thick web" beam and the bending moment (and Mc/I stress)...
  2. taoofeng

    Lug Analysis under transverse loading

    Here is the method as given in the Air Force Stress manual. It is where the Lockheed method came from. (The subscripts tend to be rather tiny so hopefully you can read...
  3. taoofeng

    Need comments on Aero-tech books?

    Rusty - As long as you're listing all the NACA Handbook of Structural Stability books, add in Part VII: Strength of Thin-wing Construction NASA TN D-162 http://ntrs.nasa.gov/search.jsp?N=0&Ntk=all&Ntx=mode%20matchall&Ntt=D-162 Author(s): Gerard, George; Becker, Herbert
  4. taoofeng

    Medieval Structural Design

    You might go to Barnes & Noble (or Amazon) on-line and do a search on Jacques Heyman. He's a retired Univ of Cambridge prof whos' written some interesting history of engineering books, including The Science of Structural Engineering, Structural Analysis:A Historical Approach and The Stone...
  5. taoofeng

    Aircraft edge distance

    I have been a structures engineer for 25 years, and the biggest arguments I ever had with Design was over edge margins. I wanted the 2D + .06 margin, but Design insisted that (a) it would add too much weight, (b) Boeing never did write this down as a requirement but only as a "suggestion", and...
  6. taoofeng

    Blind vs Solid Rivets

    This was hinted at before, but a blind fastener does not create the tight fit that a rivet does. At Boeing they take a 20% reduction in allowable fatigue stress for the blind vs riveted hole. So, unless you're dealing with a non-fatigue critical component, you should try and avoid them.

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