Stress states have been well established to affect the ductile damage and fracture behavior of metals. Most previous studies have been limited to discussing ductile damage and fracture caused by monotonic loading in the last decades. Recently, analysis of the uniaxial cyclic tensile and shear tests indicates that reverse loading remarkably influences the evolution of ductile damage and fracture behavior [1]. However, the one-axis-loaded specimen provides only specific stress states. Compared to the uniaxial tests, biaxial tests are widely used to achieve a wide range of stress states by changing preload and the loading path [2]. Therefore, this presentation addresses the evolution of ductile damage and fracture behavior of aluminum alloys under reverse loading conditions considering a broad range of stress states. To this purpose, several biaxial cyclic experiments taking into account different preloads are conducted on the newly designed biaxial specimen of the aluminum alloy. In the present work, all tests are performed in two-step loading stages. Different proportional tensile or shear preloads, without unloading, are applied at the fi loading stage to obtain various stress states. Then, biaxial cyclic loads are imposed on the specimen until fracture in the second loading stage. In the numerical simulations, a modified anisotropic elastic-plastic-damage cyclic constitutive model is used to analyze the development of damage and fracture behavior. The application of digital image correlation technique and scanning electron microscopy have enabled it to validate numerical and experimental results. In terms of the global force-displacement responses and local strain fi the predicted results of the proposed constitutive model are in good agreement with the experimental results. References [1] Z. Wei, M. Zistl, S. Gerke, and M. Brünig. “Analysis of ductile damage and fracture under reverse loading”. In: Int. J. Mech. Sci. (2022), 107476. [2] M. Zistl, M. Brünig, and S. Gerke. “Analysis of damage and fracture behavior in ductile metal sheets undergoing compression and shear preloading”. In: Int J Mater Form 15 (2022).