The effect of interphase properties on the durability of woven carbon/vinyl ester matrix composites
- Virginia Polytechnic Inst. and State Univ., Blacksburg, VA (United States)
Significant improvements in R={minus}1 fatigue durability were observed for woven carbon/vinyl ester composites where the nature of the interphase region was altered. The traditionally poor bond between carbon fiber and vinyl ester was altered through the application of a thermoplastic sizing which is compatible with the fiber surface and miscible with the matrix material. The enhancement to performance appears to be simply the result of an adequate bond between fiber and matrix which delays and slows the degradation process during the course of fatigue cycling. Both a high and low molecular weight poly(n-vinylpyrrolidone) showed significant reductions in loss of compression secant stiffness over the unsized fiber composites. A rational is suggested for describe the durability of these woven systems by assessing the mechanics of wavy tow collapse as the result of microlevel damage development.
- OSTI ID:
- 237720
- Report Number(s):
- CONF-9510177-; ISBN 1-56676-376-2; TRN: IM9625%%45
- Resource Relation:
- Conference: 10. technical conference on composite materials, Santa Monica, CA (United States), 18-20 Oct 1995; Other Information: PBD: 1995; Related Information: Is Part Of Proceedings of the American Society for Composites: Tenth technical conference. Composite materials, mechanics and processing; PB: 659 p.
- Country of Publication:
- United States
- Language:
- English
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