2026 Firat Deformation Induced Anisotropy

Deformation-induced anisotropic hardening significantly influences springback, strain localization, forming limits, and unloading-sensitive responses in metallic sheet materials, necessitating reliable representation in finite-element simulations of sheet-forming operations. While existing syntheses have clarified load-path effects and classified various constitutive models, they often overlook practical questions essential for engineering applications, such as the justification for model selection, minimum test information required for calibration, and implementation burdens at the finite element level. This article critically reviews deformation-induced anisotropic hardening in metallic sheet materials from a perspective of model selection, calibration, and finite-element deployment. It organizes experimentally observed responses into a three-layer framework linking hardening signatures, constitutive evolution modes, and representative model families. Prior syntheses are positioned to illustrate the distinct contributions of this review concerning calibration burden, identifiability, implementation readiness, and model choice. Crystal-plasticity-based approaches are explored as virtual laboratories for mechanism interpretation and data generation. Additionally, computational issues pertinent to industrial deployment are examined, focusing on local stress updates, consistent elastoplastic tangents, and parameter-identification workflows. The scope is limited to constitutive descriptions of anisotropy evolution in metallic sheets up to the onset of localized necking, aiming to provide a practical roadmap for selecting, calibrating, and implementing anisotropic hardening models in simulations.