INTEMA   05428
INSTITUTO DE INVESTIGACIONES EN CIENCIA Y TECNOLOGIA DE MATERIALES
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Study of saturated and unsaturated permeability in natural fiber fabrics
Autor/es:
EXEQUIEL S. RODRÍGUEZ; GASTÓN FRANCUCHI; ANALÍA VÁZQUEZ
Lugar:
Montreal, Canadá
Reunión:
Conferencia; 9th International Conference on Flow Processes in Composite Materials (FPCM 9); 2008
Institución organizadora:
Ecole Polytechnique de Montreal
Resumen:
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Naturals fibers
present some advantages that made them useful in composite parts: reduced
dependence on non-renewable resources, less wear on tooling, ease of handling,
lower health risk for the producer workers than glass fibers, better thermal
and sound insulation properties, low density, cost about one third of glass
fibers. RTM process can be use to
manufacture natural fiber composites, but in order to perform an optimum
process design and maximize the part quality, it is very important to have knowledge of the
flow pattern during the injection process. The key parameter that governs the
flow in the fiber bed is the permeability, together with the fluid viscosity. In
this work, the saturated and unsaturated permeabilities of woven-bidirectional
jute fabrics are studied for different porosities of the fibrous reinforcement.
Also the fluid absorption by the natural fibers and its effect on the
permeability is analyzed. It was found, as expected, that permeability
increases as the porosity does, and that saturated permeability was greater
than unsaturated permeability. This difference tends to vanish when porosity
reaches values of about 75% or higher. It was found also, that Jute fibers
absorbs large amounts of fluid. The fluid absorption affects flow behavior and reduces
both saturated and unsaturated permeability values