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Liquid Processing for Manufacturing of Composite Materials
Our efforts aim to combine CFD curing kinetics to accurately simulate resin-injection composite manufacturing. The overall objective is to reduce manufacturing-induced deficiencies, tailor mechanical, thermal, and physical properties across different length scales, and enhance overall structural performance.
Thermo-Chemo-Flow Analysis of Thermoset Resin Impregnation
Rapid cure can be undesirable, particularly during the resin impregnation process of fibre preforms. This is influenced by the temperature settings which accelerate the cross-linking reaction. To optimise convection–diffusion transport problems (reactive flows) in the LCM process, a set of thermo-chemo-flow models are developed with capability to simulate resin flows under variable process conditions. This allows the analysis of curing the rate of cure, and viscosity during the filling process as well as when complete wetout is obtained (post-filling). [source]
Two-phase Flow Impregnation
This study models flow-front advancement during the impregnation of woven fabrics. A developed technique is applied by creating tracking points (e.g., on-line monitor) in the direction of the flow to report/collect data for flow-front positions as a function of time. The study adopts the FVM-VOF-based two-phase flow model together with an implicit time-stepping scheme, i.e., a dual-time formulation solution method with a preconditioned pseudo-time derivative. [source]
Multi-scale Characteristics of Woven Structures
Resin flow through multi-ply woven fabrics is affected by the fibre orientation and laminate stacking sequence during the impregnation process. This is characterised by permeability, which measures the ability of transferring fluids within a 2D or 3D layered woven fibre architecture (i.e., through a porous medium). The work aims to investigate the feasibility of characterising macro-scale flow permeability via the micro-meso-scale (dual-scale) permeability across and along woven yarns, with different structures of yarn nesting, non-shifting, and ply orientation. [source]
Effect of Local Tow Curvature on Dual-Scale Permeability
This work investigates the dual-scale (micro- and meso-) nature of permeability during resin infusion into woven fabric by incorporating the intra tow flow where the degree of local tow curvature (tow/yarn undulation) is taken into account. [source]
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