<p>This study investigates the strain rate-dependent damage evolution of annealed AA7075 aluminum alloy under dynamic loading conditions. Tensile tests were conducted on smooth and notched specimens over a wide range of strain rates (10⁻⁵ to 5.3 × 10³&#xa0;s⁻¹) using a universal testing machine and a Split Hopkinson Tensile Bar (SHTB). For unnotched specimens, the results reveal a pronounced strain rate sensitivity, where the ultimate tensile strength increases by approximately 19%. Conversely, for the sharpest notched specimens (<i>R</i> = 1&#xa0;mm), the fracture strain undergoes a severe dynamic degradation of nearly 73%, demonstrating the critical coupling of stress triaxiality and loading velocity. A strain rate-dependent extension of the GISSMO damage model is proposed, incorporating these multi-axial mechanisms. The predictive capability of the developed model was independently validated against the experimental database, yielding a high coefficient of determination <i>R</i>² = 0.916. Furthermore, SEM fractography provides microstructural evidence of accelerated damage evolution via dynamic loading-induced large dimples (up to 10.7&#xa0;μm). The proposed framework offers a practical and efficient tool for predicting damage evolution and fracture behavior of annealed AA7075 under dynamic tensile-dominated loading conditions, making it suitable for engineering applications such as impact and crash analysis.</p>