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Inverse Identification of In-Plane and Out-Of- Plane Behavior of High-Performance Unidirectional Thermoplastic Composites in the Molten State

par Wintiba, Badadjida ;Chevalier, Jérémy;Lani, Frédéric;Massart, Thierry Jacques ;Berke, Peter
Référence Polymer composites
Publication Publié, 2026-01-23

Article révisé par les pairs

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Résumé :

A computational methodology for identifying the viscoelastic material parameters for thermoplastic unidirectional (UD) composites from bending and in-plane shear tests in molten state is presented, using a hypo-viscoelastic constitutive model. The key innovation lies in the numerical identification of in-plane and out-of-plane material parameters from experimental data (bias extension and bending tests) through a reverse engineering approach employing an optimization algorithm and finite element (FE) simulations. The identified material parameters successfully reproduce the experimental bending and bias extension response for different loading rates.