Thermal Curing Cycles for Composite Cylinders with Thick Walls and Thermoset Resins
Abstract
This paper treats the motion of long, unidirectional, continuous fibers through a Newtonian resin. There is a consolidation force on the top row of fibers or effective force (loads) on all the fibers due to their tension in filament-wound cylinders. An asymptotic analysis for high fiber volume fraction is presented here. The results of the asymptotic solution are compared to the results of a previous application of the lubrication approximation. There are several objectives to be achieved during the consolidation of a composite material. The elimination of voids, the removal of air and excess resin, a uniform degree of curing, a uniform final fiber volume and conformation to a specified fiber orientation are all necessary in the final consolidated material. The consolidation process may be initiated with surface or pressure loading, or in the case of fiber winding, consolidation results from tensile stress on the fibers due to the winding. Both types of loading produce resin and void motion which depends on the resin matrix properties (such as viscosity, thermal conductivity, cure behavior), the initial fiber volume fraction, fiber orientation, and fiber properties (thermal conductivity, diameter, fiber length) . The work presented here is concerned with resin flow and fiber motion in a fiber-resin system with an initially high fiber volume typical of composites made with thermoplastic resins.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1989
- Accession Number
- ADA234064
Entities
People
- J. S. Walker
- L. N. Hjellming