Abstract
A hybrid experimental-numerical investigation was undertaken to establish a crack kinking criterion and hence crack arrest at a tear strap under mixed-mode crack-tip deformation. Experimentally determined crack velocities and crack paths for 2024-T3 and 7075-T6 aluminum alloy, cruciform fracture specimens, 0.81 mm thick. with a 25.4-mm-wide and 0.81-mm-thick tear strap, were input to a dynamic finite-element program to compute the necessary fracture parameters. These results were then used to verify three-parameter crack extension and curving criteria under mixed-mode loading.
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