Experimental and Numerical Investigation of the Plastic Region Behaviours of AA 1100 and AA 7075 Aluminium Alloys at Different Velocities and Energy Levels

This study investigated the Johnson-Cook (J-C) plastic region model of AA-1100 and AA-7075 series aluminium alloys. The tensile, three-point bending and low-velocity impact strengths at different velocities were investigated by keeping the equation constants and temperature constant for the J-C plastic region structural model. Tensile tests and three-point bending tests were performed at velocities of 1, 10, 20, and 40 s-1, respectively. Low-velocity impact tests of AA-1100 and AA-7075 alloys were performed at energy levels of 33,35; 66,71; 100; and 133,42 J, corresponding to velocities of 1,98(0.2 m), 2,80(0.4 m), 3,43(0.6 m) and 3,96(0.8 m) m/s, respectively. In addition, the materials' three-point bending, and low-velocity impact responses were also numerically investigated using a finite element model and compared with the experimental results. It is observed that the experimental and numerical results are in agreement with each other.