By P S Bulson
The most recent advancements within the structural research of aluminium parts are provided right here giving heritage to layout principles which permits designers to realize the boldness to keep on with revolutionary principles, supported by way of exact and perceptive structural research.
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Extra resources for Aluminium structural analysis: recent European advances
The highest values of residual stresses (end of flanges, centre of web) are not very high in compression (lower than 50 N mm−2) and are even lower in tension. At the centre of the material the values are probably lower, especially when, as is usual, residual stresses change sign from one side of the profile to the other. The mechanical properties of the material did not affect the intensity and distribution of residual stresses. 11 The aim of the testing was to identify the influence of the usual manufacturing phases on the formation of residual stresses.
Considerable engineering judgement is required by the designer in assessing the costeffectiveness of a testing programme. In the aeronautical field the cost of testing is now so high that there are pressures to certify the structural adequacy of aircraft by calculation alone; particularly if the structure to be tested is a modification of a previously tested structure. Care is required, however, to ensure that the methods of attaching screw jacks or hydraulic jacks to the structure do not locally increase structural strength or stiffness, or result in local failure.
Aluminium Development Association Memorandum No SR/35, 1954. Elsevier Applied Science, London. on Allith Alloys, Monterey, California, April 1983. Naval Engineers’ Journal, 91 (5) (1979). Engineers and Shipbuilders, 90 (3) (1974) 77–92. on Steel and Aluminium Structures, Cardiff, July 1987. 115. , Verification of the conventional friction coefficient on high strength preloaded bolted connections in aluminium structures. Escuela Superior de Ingenieros Industriales de Bilbao, ECCS T2–55–81, May 1981.
Aluminium structural analysis: recent European advances by P S Bulson