| Issue |
DYMAT 2009
Volume 1, 2009
DYMAT 2009 - 9th International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading
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|---|---|---|
| Page(s) | 695 - 701 | |
| Section | Industrial Applications | |
| DOI | https://doi.org/10.1051/dymat/2009098 | |
| Published online | 15 September 2009 | |
DOI: 10.1051/dymat/2009098
Impact behaviour of the high-strength aluminium alloy AA7075-T651
T. Børvik1, 2, H. Aunehaugen1 and O.S. Hopperstad11 CRI-SIMLab, Norwegian University of Science and Technology, 7491 Trondheim, Norway
2 Norwegian Defence Estates Agency, 0103 Oslo, Norway
Published online: 15 September 2009
Abstract
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