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  1. StressMan2506

    STRESS CONCENTRATION FACTOR, SHORT CHAMFER IN EDGE OF CIRCULAR APERTURE

    Fellow Stress Engineers: Do any of you know of a reference to a stress concentration factor in-way-of a chamfer over a small proportion of the circumference of a circular aperture; see attached view. Thanks in anticipation...
  2. StressMan2506

    STABILITY OF RECTANGULAR PLATE UNDER EQUAL UNIFORM COMPRESSION ON TWO OPPOSITE EDGES 'b'

    Fellow Stress Engineers: Roark (6th & 7th editions, tables 35 & 15.2 respectively) includes 6 cases covering the above condition, namely:- a) All edges simply supported b) All edges clamped c) Edges b simply supported, edges a clamped d) Edges b simply supported, one edge a simply supported...
  3. StressMan2506

    COMPOSITE LAY-UP NOTATION

    Fellow composite-using engineers: Thread327-334726 covered similar ground to my present query. I have a document containing lay-up notation [[(0,90)/(±45)]3]s. I am working with structural analysis in which this lay-up has been interpreted as 0/45/90/-45/0/45/45/0/-45/90/45/0, i.e...
  4. StressMan2506

    POST-BUCKLING CUT-OFF OF CURVED STIFFENED PANELS (COMPOSITE SKIN & STRINGER)

    Fellow Stress Engineers: Do any of you have any references to post-buckling cut-off as applied to the above structural form? I've taken a look at the manual for the software we're using, but, as expected, it doesn't really enlighten me. I need to use engineering judgement on a low concession...
  5. StressMan2506

    BI-METALLIC MEMBER SUBJECT TO END LOAD & BENDING MOMENT

    Fellow Stress Engineers: I am investigating a doubler on one flange of an extruded I-section. The tensile & compressive E values of the I-section are, respectively 1.02 & 1.03 times those of the strap. I have some familiarity with calculating such sections under end load or bending moment, but...
  6. StressMan2506

    BOLT LOADS CALCULATED BY NACA TECH. NOTE 1051

    Fellow Stress Engineers: Is anyone familiar with this document (PRELIMINARY INVESTIGATION OF THE LOADS CARRIED BY INDIVIDUAL BOLTS IN BOLTED JOINTS)? One would expect that the 1st & last fasteners in a row would be equally loaded, the 2nd & penultimate likewise, and so on, but this is not what...
  7. StressMan2506

    BUCKLING OF A TAPERED PLATE

    Fellow stress/structural engineers: I am processing a concession in which a tool mark has been blended out of a flange of an I-section beam. The result is that, over a limited length the thickness varies from nominal at the toe of the flange/web fillet to approx. 2/3 nominal at the free edge...
  8. StressMan2506

    REPEATED SOLUTION OF A SOLVE BLOCK

    Fellow Mathcad users: I am entirely self-taught in Mathcad; accordingly, there are a number of gaps in my knowledge. One such is that I do not know whether it is possible to automate the repeated solution of a solve block. Hopefully the attachment shows what I would like to do. I would like to...
  9. StressMan2506

    Huth Formula for Fastener Flexibility

    Fellow Stress Engineers: In a now closed thread on this topic (thread2-192705) analyst64 posted that he/she had a scanned copy of Huth's paper. If analyst64 is still active, could he/she (or anyone else in possession) please upload it to ENGINEERING.com? Thanks in anticipation.
  10. StressMan2506

    PACKER (OR SHIM) REDUCTION FACTOR, DOUBLE-LAP SHEAR BOLTED JOINT

    Fellow Stress Engineers: I am familiar with a couple of methods for calculating the strength reduction factor arising from packers (shims) in single-lap joints. Presently I am working a concession in which a packer is to be fitted on one side of a double-lap joint. Does anyone know of a method...
  11. StressMan2506

    BURST-OUT STRESS, METALLIC PLATE

    Fellow stress engineers: Do any of you know of a method for calculating the stresses induced in the ligament by a fastener loaded such that it is tending to burst out through a straight-edge? I have the means to calculate the RF in the form of allowable load divided by acting load, but that's...
  12. StressMan2506

    NEUBER'S METHOD FOR EFFECTIVE STRESS CONCENTRATION

    Fellow Stress Engineers: Ref. Neuber's Formula (Roark 7, pp 774 & 778). In the past I have used this formula to determine an effective stress concentration from a single gross stress. This time I have axial & bending stresses. I can apply Peterson 2, Charts 4.3 & 4.80 separately. If I were...
  13. StressMan2506

    RECTANGULAR SECTION UNDER COMBINED BENDING & AXIAL LOAD

    Fellow stress engineers: ESDU 01.06.03 provides a means for determining max. permissible bending moment in a rectangular section also subject to axial load. The moment is a shape factor x 0.2% proof stress x elastic section modulus. This method does not give me the moment capability I am...
  14. StressMan2506

    ESTIMATION OF NON-LINEAR STRESS FROM LINEAR ANALYSIS

    Fellow Stress Engineers: Some time ago I saw (in a calc file) a method for estimating non-linear stress from linear finite element analysis. I remember the method but did not take note of any references, so I am reluctant to put it forward myself. It is based on the assumption that the...
  15. StressMan2506

    LUG LOADED OUT OF ITS PLANE

    Hi fellow engineers: I am analyzing a number of systems brackets. They are riveted or bolted to structure and, the regions in-way-of these connections can be treated as lugs subjected to in-plane and out-of-plane loading. I am familiar with analyzing lugs for in-plane load, but I have not found...
  16. StressMan2506

    SHEAR-OUT/BURST-OUT IN COMPOSITE PANELS

    Calling composite stressers... Does anyone know of a method for calculating shear-out/burst-out strength in composites where the fibres are orientated at other than 0, 45 or 90 dgerees to the subject edge? Thanks in anticipation.
  17. StressMan2506

    Ti-6Al-4V ANNEALED PLATE

    Does anyone have a full (or partial) range stress-strain curve for this material in the thickness band encompassing 16 mm (5/8")? Or, better still, does anyone have the Ramberg-Osgood parameters? Thanks in anticipation.
  18. StressMan2506

    Ti-6Al-4V ANNEALED PLATE

    Does anyone have a full (or partial) range stress-strain curve for this material in the thickness band encompassing 16 mm (5/8")? Thanks in anticipation.
  19. StressMan2506

    STRESSES AROUND FILLED HOLES

    Happy New Year! Does anyone have either of the two papers shown in the attachment? If so, it would be appreciated if they could be uploaded. Thanks in anticipation.
  20. StressMan2506

    LOOPING

    I need some assistance with looping. Specifically I would like to interrogate an array to list the values in it and number of occurrences of each one. Say my array was (0.980 0.982 0.971 0.976 0.977 0.976 0.976 0.975 0.969 0.968), I would like to get a list of the form:- 0.968 1 0.969 1...

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