Damage Characterization and Modeling of a 7075-T651 Aluminum Plate
Jordon, J. B., Horstemeyer, M., Solanki, K.N., Bernard, J.D., Berry, J., & Williams, T. N. (2009). Damage Characterization and Modeling of a 7075-T651 Aluminum Plate. Materials Science & Engineering A. Elsevier Ltd. 527(1-2), 169-178.
In this paper, the damage-induced anisotropy arising from material microstructure heterogeneities at two different length scales was characterized and modeled for a wrought aluminum alloy. Experiments were performed on a 7075-T651 aluminum alloy using sub-standard tensile specimens in three different orientations with respect to the rolling direction. Scanning electron microscopy was employed to characterize the stereology of the final damage state of the fracture surfaces in terms of cracked and or debonded particles. A physically-motivated internal state variable continuum model was used to capture the damage progression by incorporating material microstructural features. The continuum model showed good comparisons to the experimental data by capturing the damage-induced anisotropic material response. Estimations of the mechanical stress-strain response, material damage histories, and final failure were numerically calculated and experimentally validated thus demonstrating that the final failure state was strongly dependent on the particle morphology.