Viscoelastic behavior of short-fiber composites
Thesis/Dissertation
·
OSTI ID:5253206
The factors influencing the viscoelastic behavior of short-fiber and particulate composites were examined from both a theoretical and experimental viewpoint. The Aggregate Model, based on the elastic bounding results of Wu and McCullough, was reviewed. The model combines the properties of the pure components with the volume fraction, orientation, and aspect ratio distributions of the fiber phase to predict mechanical properties. This model was converted to creep and dynamic mechanical models assuming quasi-static viscoelasticity. The elastic and viscoelastic behavior of neat, cross-linked polyester was characterized. It was shown that thermoreversible physical aging significantly affected the creep response of the neat polyester. Smooth master cures for extended time were generated by the use of a single temperature shift function. Prediction of creep response from short-term dynamic mechanical analysis is in good agreement with observed creep response when aging shift factors were introduced. Static and creep characteristics of several glass-filled polyesters were obtained.
- Research Organization:
- Delaware Univ., Newark (USA)
- OSTI ID:
- 5253206
- Country of Publication:
- United States
- Language:
- English
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