Abstract
The effect of void interaction on the damage progression in aluminum under uniaxial tension is studied via molecular dynamics (MD) method. MD geometries containing two adjacent elliptical voids are created with different void shape combination and intervoid ligament distance (ILD). The dislocation emission and development, stress–strain relation, porosity accumulation, void shape evolution and ILD shrinkage are monitored during loading process. The critical stress required by the voids to trigger the dislocation emission is in line with the prediction of the Lubarda model under the uniaxial tension case. Our results indicate that the onset strain of dislocation emission is mainly subject to the void shape. The void shape combination is found more influential than the ILD on the stress response and the porosity accumulation.
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