Aluminium structural analysis: recent European advances by P S Bulson

By P S Bulson

The most recent advancements within the structural research of aluminium elements are offered the following giving history to layout ideas which permits designers to achieve the boldness to keep on with innovative principles, supported by way of exact and perceptive structural research.

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A proposal is that these circumstances can be taken into account by increasing the value of the partial safety factor for the material (γm).  Very often the welder has to produce a simple joint that meets a strength requirement, but the rules do not distinguish between failure of the specimen in the weld or in the adjacent heat­affected material.  For some reason the validity of test data is often unquestioned, whereas endless discussions take place on the accuracy of analysis.  Considerable engineering judgement is required by the designer in assessing the cost­effectiveness of a testing programme.

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. , Validation of design properties of welded DGFVE 232A AlZnMg alloy, naturally aged after welding, RARDE (Christchurch), Branch Note EE/Br 68, 1983.  RARDE (Christchruch), Branch Note EE/BR 102, 1983.  American Society for Testing and Materials, STP 648, 1978.  International Institute of Welding, Boston Conference, 1984.

Values of the rate of increase of strain/second loadings are: for some typical Traffic on bridges 10−5 to 10−3 Wave slamming on ships’ plating and Snap­over buckling 2×10−3 to 6×10−1 Collision—ships’ plating (local) 2 Shock loading >20 Page 23 When stresses can generally be calculated assuming the load to be statically applied; for higher strain rates the dynamic response of the structure to the loading must be taken into account in the calculations.  This aspect of the fracture behaviour of aluminium alloys appears to have attracted little attention, and data on high strain rate fracture properties are very limited.

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