Modelling of the mechanical behaviour of amorphous glassy polymer based on the Quasi Point Defect theory-Part I: Uniaxial validation on polycarbonate

R. Rinaldi (1) , R. Gaertner , Laurent Chazeau (1) , C. Gauthier (1)

1 MATEIS - Matériaux, ingénierie et science [Villeurbanne]

This paper is devoted to the modelling of the viscoelasto-viscoplastic behaviour of amorphous polymers based on the Quasi Point Defects (QPD) theory. A summarized and unified description of the main assumptions is presented in its scalar formulation to compute the complex viscoelasto-viscoplastic behaviour of an amorphous medium in the glassy state from linear to non-linear ranges. Based on an original scenario for the microstructural reorganization caused by an external thermomechanical stimulus and related to the two main relaxation processes, this theory allows a coherent description of the material response under large conditions of temperature and strain rate by using a single set of material parameters. A convincing validation is performed on a ductile bisphenol-A polycarbonate (PC-BPA) by comparison between computed results and experimental measurements. © 2011 Elsevier Ltd. All rights reserved.

Mots clés: Amorphous glassy polymers; Amorphous polymers; Bisphenol A; Experimental measurements; Glassy state; Material parameter; Material response; Mechanical behaviour; Micro-structural; Modelling; Non-linear; QPD theory; Thermo-mechanical; Unified description; Viscoplastic; Defects; Phenols; Point defects; Strain rate; Polymers

Domaines: Matériaux

R. Rinaldi, R. Gaertner, Laurent Chazeau, C. Gauthier. Modelling of the mechanical behaviour of amorphous glassy polymer based on the Quasi Point Defect theory-Part I: Uniaxial validation on polycarbonate. International Journal of Non-Linear Mechanics, 2011, 46 (3), pp.496-506. ⟨10.1016/j.ijnonlinmec.2010.11.004⟩. ⟨hal-01813658⟩