IT is shown in the present paper that a beam may be constructed, consisting of a steel section securely bolted to a lower section of high‐tensile aluminium alloy, having a weight much lower than that of a plain steel beam of equal strength. This is frequently desirable when the weight of a steel beam would be excessive, but the cost of a section constructed entirely of aluminium alloy is unwarranted.
Dudley, L.P. (1937), "Composite I‐Section Beams: Their Properties when Subjected to Bending Stresses, with Particular Reference to Steel‐Duralumin Beams", Aircraft Engineering and Aerospace Technology, Vol. 9 No. 6, pp. 165-166. https://doi.org/10.1108/eb030191
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