J. Phys. IV France 110 (2003) 39
Modeling of strain rates and temperature effects on the yield behavior of amorphous polymersJ. Richeton, S. Ahzi, L. Daridon and Y. Rémond
Université Louis Pasteur, Institut de Mécanique des Fluides et des Solides, UMR 7507, 2 rue Boussingault, 67000 Strasbourg, France
Three molecular theories are used to predict the yield behavior of amorphous polymers for a wide range of temperatures and strain rates. These include the state transition theory of Ree-Eyring, the conformational change theory of Robertson and the disclinations theory of Argon. For each of these models, the yield stress behavior of polymethylmethacrylate (PMMA) is described over a wide range of strain rates and temperatures. According to experimental values for polycarbonate (PC), the Ree-Eyring model seems to be the suitable theory at high strain rates for the prediction of the yield stress of amorphous polymers.
© EDP Sciences 2003