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An outline is given of a combined photoelastic and fatigue programme of work on single-pin double-strap joints; the stress concentration factors obtained from photoelastic tests are to be correlated with the results from a parallel series of metal fatiguetests on geometrically similar specimens. The form and dimensions for a photoelastic specimen suitable for this work are given. Further results will be published as the work proceeds. This Note outlines a programme of work recently initiated by the Royal Aeronautical Society, and now being done under Ministry of Supply contract, in connection with the fatigue strength of bolted joints.
In solving for the moments at the supports of a continuous beam, recourse is often made to Professor Hardy Cross's method when the number of supports is comparatively large. This paper describes a graphical method of moment distribution and it is proposed first to work out a specific problem by Cross's method, so that the validity of each step of the graphical method can be checked.
In My Note on “Stress Analysis of Circular Frames ” I was unable, due to lack of space, to discuss more thoroughly the reasons why the name of W. Ritz is omitted with reference to his method. The reader, interested in that subject, can find all the details in my recently published discussion and paper.