Engineering Transactions, 59, 2, pp. 85–100, 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 16 Armii Ludowej Av., 00-637 Warsaw, Poland

A. GLINICKA
Warsaw University of Technology Faculty of Civil Engineering Department for Strength of Materials 16 Armii Ludowej Av., 00-637 Warsaw, 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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