Applying FLD Damage Criteria to Predict Damage Evolution in Polymer Sheets Under Nonlinear Forming Conditions

Aerospace parts and other thin-walled constructions with intricate patterns frequently employ sheet polymers. Formability is a crucial consideration since these materials may show damage and fractures during the forming process. Predicting failure modes and comprehending formation limitations are paramount to process design engineers. To forecast damage progression in single-sheet polymer forming processes that are characterized by intricate and nonlinear strain patterns, this work uses a fully integrated elastic-plastic damage model. For components with complex strain trajectories, the model accurately predicts deformation and damage behavior, drawing on theories of finite strain and plane stress plastic deformation. When complicated and nonlinear strain circumstances are present in sheet polymer forming procedures, the combination of finite element analysis with continuum damage mechanics provides a quick and precise way to predict the damage progression.