Permeability estimation algorithm to simultaneously characterize the distribution media and the fabric preform in vacuum assisted resin transfer molding process

Gökçe, Ali Fuat; Chohra, Mourad; Advani, Suresh G.; Walsh, Shawn M.

doi:10.1016/j.compscitech.2005.05.012

Cited by 40 publications

(22 citation statements)

References 26 publications

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“…The flow progression was monitored by the two video cameras. The flow front location was logged at three different times, and the permeability estimation algorithm (PEA) [17] was utilized in order to obtain the permeability value of the distribution media and the preform in the through the thickness direction. Finally, the three independent values obtained from the PEA were averaged, and used for all subsequent simulation work.…”

Section: Experimental Validationmentioning

confidence: 99%

Simulation and validation of resin flow during manufacturing of composite panels containing embedded impermeable inserts with the VARTM process

et al. 2007

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Modern composite materials are becoming more and more advanced as engineers are better able to take advantage of their properties. In addition to their lighter weight and net-shape manufacturing, current interest is to make these materials multifunctional. This may require one to insert various objects into the composite to achieve a variety of different goals. It is important to understand how these embedded objects will affect both the manufacturing and the structural integrity of the component. In this work, the effects of impermeable embedded inserts on the infusion stage of vacuum-assisted resin transfer molding (VARTM) will be explored. In VARTM, one places a distribution media on top of the preform to aid the filling as the resin will first fill the face of the preform in contact with the distribution media and will then infuse the preform in the thickness direction. However, if one has an embedded impermeable insert in the thickness direction, it will obstruct the flow in the region below the embedded object. Several case studies are conducted to understand the effect of the geometry and placement of the embedded insert and the distribution media lay out and properties on the impregnation of the resin into the fiber preform. Finally, an approach is outlined to modify the layout of the distribution media in order to ensure a complete saturation of the preform under all but the most extreme conditions. The approach is validated with experiments. POLYM. COMPOS., 28: 442-450, 2007.

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Section: Experimental Validationmentioning

confidence: 99%

Simulation and validation of resin flow during manufacturing of composite panels containing embedded impermeable inserts with the VARTM process

et al. 2007

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“…The following equation is governing equation restated from (11) @ 2p @x 2 À k 2 1p ¼ 0 hûi ¼ À @p @x @ŝ The following boundary conditions are applied to (24) and describe the flow prior to the entrance becoming fully saturated as shown in Fig. 11 p…”

Section: Appendix Amentioning

confidence: 99%

“…Once the tow permeability has been calculated, a value for bulk permeability, K, is initially assumed and the partially and fully saturated flow fronts are plotted using the analytic solution. The shape of the flow front with respect to time from the analytical solution is compared with the one generated from LIMS and the bulk permeability in the analytic solution is updated using the same procedure as in [24], and the new graph is compared with the numerical graph. This process is continued iteratively until either the bulk permeability stops varying or the two curves match within a given tolerance.…”

Section: Numerically Simulated Experimentsmentioning

confidence: 99%

A closed form solution for flow in dual scale fibrous porous media under constant injection pressure conditions

Zhou

Alms

Advani

2008

Composites Science and Technology

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“…real parts are most often manufactured using lay-ups of multiple different reinforcements and include ply drop-off and localised reinforcement. the permeability resulting in the stacking of layers of different materials can be measured for the particular assembly, but models also allow prediction of the preform properties based on the properties of each individual material [45][46][47][48].…”

Section: Reinforcement Permeabilitymentioning

confidence: 99%

Resin infusion/liquid composite moulding (LCM) of advanced fibre-reinforced polymer (FRP)

Bickerton

Govignon

Kelly

2013

Advanced Fibre-Reinforced Polymer (FRP) Composites for Structural Applications

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Permeability estimation algorithm to simultaneously characterize the distribution media and the fabric preform in vacuum assisted resin transfer molding process

Cited by 40 publications

References 26 publications

Simulation and validation of resin flow during manufacturing of composite panels containing embedded impermeable inserts with the VARTM process

Simulation and validation of resin flow during manufacturing of composite panels containing embedded impermeable inserts with the VARTM process

A closed form solution for flow in dual scale fibrous porous media under constant injection pressure conditions

Resin infusion/liquid composite moulding (LCM) of advanced fibre-reinforced polymer (FRP)

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