By P S Bulson
The most recent advancements within the structural research of aluminium elements are provided the following giving heritage to layout ideas which permits designers to realize the arrogance to persist with revolutionary principles, supported by way of actual and perceptive structural research.
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Additional resources for Aluminium structural analysis: recent European advances
The RambergOsgood law is now widely used because its predicted behaviour is very close to the actual behaviour of aluminium alloys. RambergOsgood curves give a lower bound to the experimental curves owing to the use of the minimum value of Young’s modulus (E=70000 N mm−2). For these reasons the RambergOsgood law has been used in the computations carried out by the ECCS Committee on Light Alloy Structures when developing the European recommendations for aluminium alloy structures (1978). A very simple proposal7 is to assume 10n=f (N mm−2).
NCRE report R 611, May 1975. 28, 1955. AluminiumVerlag, Dusseldorf, 1982. 105. Zeitschrift des Veriens Deutscher Ingenieure, 102 (1960) 1729. Institution of Structural Engineers, London, 1963. 1984. , Spring Meeting, paper 2, (1988) 1–9. British Welding Journal (April 1960). Aluminium 47 (1971). Der Bauingenieur, 61 (1986) 507. 135. International Institute of Welding, Boston Conference, 1984. RARDE (Christchurch), Branch Note EE/BR101, 1983. RARDE (Christchurch), Branch Note EE/BR 106, 1983.
1 Extruded profiles. 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.