This chapter presents the development of a 3D damage model employed in investigating the flexural behavior and failure mechanisms of carbon fiber-reinforced aluminum laminates (CARALL) during the three-point bending test. The damage model incorporates Hashin and Puck failure criteria for assessing damage in fibers and the matrix, respectively. The evolution of damage is controlled through a formulation dependent on equivalent displacements and stresses suitable for 3D models. In addition, a computationally efficient algorithm was adopted in the current model to search for the fracture angle in Puck’s inter-fiber criteria. This model was able to capture the failure sequence and damage mechanisms in the three-point bending test of CARALL, which included fiber breakage, matrix cracking, delamination, and plastic deformation in the aluminum layers.