Mechanisms of toughening thermoset resins
- Univ. of London (United Kingdom)
- National Institute of Standards and Technology, Gaithersburg, MD (United States)
- BFGoodrich Co., Brecksville, OH (United States)
A toughened thermoset generally contains elastic or thermoplastic domains dispersed in discrete form throughout the matrix resin to increase the resistance to crack-growth initiation. Fracture behavior is governed by characteristics of viscoelasticity, shear yielding, and dilatational deformation involving cavitation. In recent years, concepts of theoretical developments of failure mechanisms based on fracture mechanics have been advanced, although controversy over details still exists. The aim of this chapter is to review in detail some of the recent developments in toughening mechanisms and the relationships between microstructure and fracture behavior as illustrated by rubber-toughened epoxy resins. This review considers the behavior of bulk resin, adhesive joints, and matrices of composites. Recent modeling efforts for toughening mechanisms that give a quantitative description of the microstructure-fracture property relationships are also reviewed. 110 refs., 8 figs., 3 tabs.
- OSTI ID:
- 76164
- Report Number(s):
- CONF-900802--
- Country of Publication:
- United States
- Language:
- English
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