Engineering Transactions, 59, 2, pp. 85–100, 2011
10.24423/engtrans.151.2011

The Static and Dynamic Compressive Behaviour of Selected Aluminium Alloys

R. WINZER
Warsaw University of Technology,Faculty of Civil Engineering,Department for Strength of Materials, Warszawa
Poland

A. GLINICKA
Warsaw University of Technology, Faculty of Civil Engineering, Department for Strength of Materials, Warszawa
Poland

The mechanical properties of structural aluminium alloys EN AW-5083 and EN AW-6082 in the ‘H111’ and ‘T6’ conditions, respectively, subjected to compressive loadings in the quasi- static and dynamic strain rate regimes, are investigated. Both alloys are used as structural components not only in car body design or ship building, but also in civil engineering. There- fore, compression tests at room temperature were conducted using a servohydraulic Instron machine, in order to determine the materials‘ behaviour at low and intermediate rates of defor- mation. In addition, to predict the dynamic response of these materials, the Split Hopkinson Pressure Bar (SHPB) technique was utilized. For alloy 5083-H111, a changeover from negative to positive strain rate sensitivity at dynamic strain rates is observable, whilst alloy 6082-T6 exhibits a mild trend towards positive strain-rate sensitivity. Furthermore, the coefficients of the Johnson-Cook model, that are valid under dynamic conditions, are determined. The finite element simulation of SHPB experiments shows that the constitutive model represents the materials’ behaviour quite well.
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DOI: 10.24423/engtrans.151.2011