Experimental Research into Fracture of EN-AW 2024 and EW-AW 2007 Aluminum Alloy Specimens with Notches Subjected to Tension

摘要

The paper presents the results of experimental tests of elasto-plastic fracture of axially symmetric specimens with circumferential notches with various round notch radii at the notch's root. The tests were conducted for two materials: EN-AW 2024 and EN-AW 2007 aluminum alloys. The specimens were subjected to monotonic uniaxial tensile test. Special attention was paid to the shape of the fracture surface, the change of critical force value and the maximum displacement, depending on the shape of the notch. Additionally, hardening curves are presented for the adopted materials and the results of Finite Element calculations of stress and strain fields in the specimens with different notch radii.