• Michaud, Véronique
• Teixidó, Helena
• Caglar, Baris

Abstract

Visualization of resin flow progression through fibrous preforms is often sought to elucidate flow patterns and validate models for filling prediction for liquid composite molding processes. Here, conventional X-ray radiography is compared to X-ray phase contrast technique to image in-situ constant flow rate impregnation of a non-translucent unidirectional carbon fabric. X-ray attenuation of the fluid phase was increased by using a ZnI2-based contrasting agent, leading to enough contrast between the liquid and the low density fibers. We proved the suitability of conventional X-ray transmission to visualize fluid paths by elucidating different flow patterns, spanning from capillary to viscous regimes and a macro-void entrapment phenomenon

Topics

• density
• impedance spectroscopy
• Carbon
• phase
• composite
• void
• resin