Abstract
Constitutive equations are derived for the isothermal viscoelastic response of glassy polymers at small strains. An amorphous polymer is modeled as a composite material consisting of a temporary network of long chains, immobile voids, and free volume gas diffusing through the network. The model is applied to analyze stress-induced densification of polymers in tensile and compressive relaxation tests. It is demonstrated that the stress-strain relations adequately predict a decrease in the specific volume observed in uniaxial experiments on polycarbonate.
Original language | English |
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Pages (from-to) | 702-708 |
Number of pages | 7 |
Journal | Journal of Applied Mechanics, Transactions ASME |
Volume | 66 |
Issue number | 3 |
DOIs | |
State | Published - 1 Jan 1999 |
Externally published | Yes |
ASJC Scopus subject areas
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering