The effects of heat and moisture on the mechanical properties of pultruded graphite/epoxy and glass epoxy composites
- Univ. of Mississippi, University, MS (United States)
The effects of heat and moisture on the mechanical properties of pultruded composites were tested by the three-point flex method (ASTM D790). To reduce the tendency to associate variations in flexural strength with the resin system or the reinforcement, two epoxy resin systems and two types of reinforcement (glass and graphite) were used to produce three pultruded products. Moduli, as determined by the three-point flexural method, were also analyzed to determine the effects of heat and moisture. The products were tested in seven environmental conditions, including as-pultruded, and variations of wet, hot and hot-wet. Comparison of flexural strengths and moduli of the products allowed the determination of the effects of heat and moisture on strength degradation of the hot-wet product. Results of this study indicate that the reduction in flexural strength and moduli associated with hot-wet testing can be attributed to the combination of the heat and moisture and not to a single factor.
- OSTI ID:
- 392423
- Report Number(s):
- CONF-9602107--
- Country of Publication:
- United States
- Language:
- English
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