| Numéro |
J. Phys. Colloques
Volume 42, Numéro C5, Octobre 1981
ICIFUAS-7Seventh International Conference on Internal Friction and Ultrasonic Attenuation in Solids |
|
|---|---|---|
| Page(s) | C5-569 - C5-574 | |
| DOI | https://doi.org/10.1051/jphyscol:1981587 | |
ICIFUAS-7
Seventh International Conference on Internal Friction and Ultrasonic Attenuation in Solids
J. Phys. Colloques 42 (1981) C5-569-C5-574
DOI: 10.1051/jphyscol:1981587
Ecole Nationale Supérieure de Mécanique et d'Aérotechnique, Laboratoire de Mécanique et Physique des Matériaux, Equipe de Recherche Associé au C.N.R.S. n° 123, 86034 Poitiers Cedex, France
Seventh International Conference on Internal Friction and Ultrasonic Attenuation in Solids
J. Phys. Colloques 42 (1981) C5-569-C5-574
DOI: 10.1051/jphyscol:1981587
INTERNAL FRICTION OF GLASSY POLYCARBONATE DURING PLASTIC FLOW
J. Parisot, J. Astier, A. Fernandez et O. RafiEcole Nationale Supérieure de Mécanique et d'Aérotechnique, Laboratoire de Mécanique et Physique des Matériaux, Equipe de Recherche Associé au C.N.R.S. n° 123, 86034 Poitiers Cedex, France
Abstract
We have measured internal friction of polycarbonate in torsion, during i) a constant strain-rate tensile test ; ii) a differential strain-rate test ; iii) several relaxation tests. We show that internal friction is strongly dependent on strain rate [MATH], but independant on strain and stress. Polycarbonate behaviour shows some analogies with metals : therefore interpretation of the results is based upon the assumption that deformation in due to defects motions. In this view, internal friction can provide means for estimating internal stress.