Motion of Continuous Fibers through a Newtonian Resin for High Fiber Volume Fraction
NATIONAL CENTER FOR COMPOSITE MATERIALS RESEARCH URBANA IL
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This paper presents autoclave temperature histories to cure thick- section composite cylinders with graphite fibers and thermoset resins. The two cylinders considered have wall thicknesses of 0.15 m and 0.3 m. The first objective is to achieve a consolidation period when the resin viscosity is everywhere relatively low for a reasonably long period of time. For the 0.15 m thickness cylinder, the viscosity drops below 15 Pas for 4.1 hrs. for the 0.3 m thickness cylinder, the viscosity drops below 30 Pas for 3.4 hrs. The second objective is to complete curing with the constraint that the temperature never exceeds 180 C at any point in the composite. This objective is achieved by limiting the autoclave temperature after the consolidation period. The peak interior temperature is very sensitive to small changes in the autoclave temperature during the final stages of curing.
- Ceramics, Refractories and Glass