DYMAT 2009
Volume 1, 2009
DYMAT 2009 - 9th International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading
Page(s) 695 - 701
Section Industrial Applications
Published online 15 September 2009
DYMAT 2009 (2009) 695-701
DOI: 10.1051/dymat/2009098

Impact behaviour of the high-strength aluminium alloy AA7075-T651

T. Børvik1, 2, H. Aunehaugen1 and O.S. Hopperstad1

1  CRI-SIMLab, Norwegian University of Science and Technology, 7491 Trondheim, Norway
2  Norwegian Defence Estates Agency, 0103 Oslo, Norway

Published online: 15 September 2009

In this study, the mechanical properties of 20 mm thick rolled plates of AA7075-T651 are determined based on a number of material tests. The obtained data are used to calibrate a modified version of the Johnson-Cook constitutive relation and the Cockcroft-Latham fracture criterion. Component tests using 20 mm diameter, 197 g mass projectiles with various nose shapes are carried out in a compressed gas-gun to reveal the alloy's resistance to ballistic impact. The results are compared to preliminary FE simulations using LS-DYNA and the calibrated material model. Even though the simulations are not able to describe the quasi-brittle failure process of the aluminium plates in full detail, reasonable agreement between experimental and predicted results is obtained.

© EDP Sciences 2009