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  • Users: edbgtr
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  1. edbgtr

    Rib or Frame Stringer Support

    G’Day Eng-Tippers, A question for detail stress engineers regarding stringer beam-column compression analysis. It has come to my notice that new forms of skin stringer construction has led to changes in stringer support conditions at the frames or ribs through which they pass. In the past...
  2. edbgtr

    130 deg Flush Head Fastener Metal Joint Allowables

    G’day Eng-Tippers, I have a question that a colleague and I are puzzling over. Does anyone here have a method for correcting 100 degree flush head fastener data in aluminium sheet for other higher angle flush head fasteners? My reverse engineering of the sparse 120 degree data in the MMPDS...
  3. edbgtr

    Needham Again

    thread2-222052 Greetings inertia4u (Nert) Did you get a copy of Needham's crippling paper that you requested back in 2008? If you did, would you mind posting it as an attachment here, I'd really like to have a copy of this paper. I cannot find it on the Internet. Can anyone else help out...
  4. edbgtr

    Blended-out Surface Damage SCF Reference

    Greetings All I am searching for a copy of the original reference for the information given in Fig. 16.6.1 of Prof. MCY Niu’s book – Stress Analysis and Sizing, 2nd Ed. In particular, I am looking for a copy of the reference for the blended-out surface notch (scratch, gouge, corrosion pit, etc.)...
  5. edbgtr

    Request for Shim/Filler Joint Data

    Good-day Eng-Tippers, I’m looking for statistically significant single shear joint failure strength test results for fastener sheet, or plate (metal), combinations with and without various shim/filler thicknesses. The ideal for me would be a series of test results performed on such joints where...
  6. edbgtr

    Pocketed Panel Shear Buckling

    Good Day Eng-Tippers I am looking for help on the subject of shear buckling of pocketed panels. Does anyone here have FEA or lab-test results from a systematic investigation into shear buckling of rectangular panels with varying percentages of edge thickening across the length and width of the...
  7. edbgtr

    A-286 RT Fatigue Data

    Hello All I'm looking for RT fatigue S-N data for the high strength Cres material A-286, now widely used in aircraft bolts. Only high temperature S-N data is available in the MMPDS-02 and I'm searching for normal operating temperature data relating to the 170 ksi Heat Treat condition. Curves...
  8. edbgtr

    Web Bend Buckling

    G’day All I’m sure we are all familiar with the Windenburg formula of providing simply supported stability to a compression member free-edge by means of a lip (Bruhn C7.9). There are also formulas for sizing stiffeners that provide a simply supported condition for shear webs (McCombs’...
  9. edbgtr

    Allowable, Scratches, Nicks & Dents

    I need to specify the allowable damage for a new airframe. These are usually in terms of scratches, nicks and dents in terms of length (or diameter), depth of the damage type. I'd like some advice on how one goes about setting the parameters for this kind of damage in the Structural Repair...

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