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Titolo:
Viscoelastic properties of a resin commonly used in the single fiber fragmentation test
Autore:
Hunston, D; Holmes, G; Peterson, R;
Indirizzi:
Natl Inst Stand & Technol, Div Polymers, Gaithersburg, MD 20899 USA Natl Inst Stand & Technol Gaithersburg MD USA 20899 ersburg, MD 20899 USA
Titolo Testata:
JOURNAL OF REINFORCED PLASTICS AND COMPOSITES
fascicolo: 18, volume: 18, anno: 1999,
pagine: 1346 - 1657
SICI:
0731-6844(1999)18:18<1346:VPOARC>2.0.ZU;2-H
Fonte:
ISI
Lingua:
ENG
Soggetto:
STRENGTH; COMPOSITES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
25
Recensione:
Indirizzi per estratti:
Indirizzo: Hunston, D Natl Inst Stand & Technol, Div Polymers, Gaithersburg, MD 20899USA Natl Inst Stand & Technol Gaithersburg MD USA 20899 20899 USA
Citazione:
D. Hunston et al., "Viscoelastic properties of a resin commonly used in the single fiber fragmentation test", J REINF PL, 18(18), 1999, pp. 1346-1657

Abstract

The fiber-matrix interface can play an important role in the performance of a composite, and consequently, it has been the subject of considerable study. One of the experiments often used to characterize the strength or quality of the interface is the single-fiber fragmentation test. The models used to analyze the data from this test involve a number of assumptions, one of which is the constitutive behavior of the matrix resin. To evaluate this assumption, a fragmentation apparatus was modified to include a load cell so both stress and strain could be measured during the experiment. Surprisingly, the results show that not only is the behavior viscoelastic, but virtually all of the fragmentation takes place in a range where the response is non-linear. To characterize this behavior, single-step, stress-relaxation experiments were conducted on a resin system often used in such tests. The results indicate that a simple power law model with strain-dependent parameters could describe the behavior over a very wide range of conditions. By using this characterization and the strain history, a crude fit to the actualloading curve in a fragmentation test could be obtained. In order to achieve quantitative agreement, however, a modified power law model was required. Such a relationship was shown to describe the loading curve for two quitedifferent loading procedures.

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Documento generato il 01/04/20 alle ore 02:09:25