Search Results - "Parnas, R. S."

Modelling of permeability of textile reinforcements: lattice Boltzmann method by Belov, E.B., Lomov, S.V., Verpoest, Ignaas, Peters, T., Roose, D., Parnas, R.S., Hoes, K., Sol, H.

“…Textile reinforcements are characterised by a hierarchy of structure, which allows a general structural approach to their behaviour and their use in composite…”
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Textile composites: modelling strategies by Lomov, S.V., Huysmans, G., Luo, Y., Parnas, R.S., Prodromou, A., Verpoest, I., Phelan, F.R.

“…Textile materials are characterised by the distinct hierarchy of structure, which should be represented by a model of textile geometry and mechanical…”
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Investigation into the relationship between the gravity vector and the flow vector to improve performance in two-phase continuous flow biodiesel reactor by Unker, S.A., Boucher, M.B., Hawley, K.R., Midgette, A.A., Stuart, J.D., Parnas, R.S.

“…The following study analyzes the performance of a continuous flow biodiesel reactor/separator. The reactor achieves high conversion of vegetable oil…”
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Pore network modeling of permeability for textile reinforcements by Delerue, J.-F., Lomov, S. V., Parnas, R. S., Verpoest, I., Wevers, M.

“…The homogenized permeability of textile reinforcement is computed using pore network modeling. The model takes as input a 3D image of the reinforcement,…”
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Characterization of 3D fiber preform permeability tensor in radial flow using an inverse algorithm based on sensors and simulation by Okonkwo, K., Simacek, P., Advani, S.G., Parnas, R.S.

“…In Liquid Composite Molding (LCM), the fiber preform is placed in a mold and resin is injected through a gate to fill the empty spaces within the mold. LCM…”
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Experimental and Theoretical Characterization of the Geometry of Two-Dimensional Braided Fabrics by Lomov, S.V., Parnas, R.S., Bandyopadhyay Ghosh, S., Verpoest, I., Nakai, A.

“…A model of the geometry of flat braids is proposed, based on coding of the braid topology and on the minimum energy principle for the yams. The description of…”
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Optical coherence tomography of glass reinforced polymer composites by Dunkers, Joy P., Parnas, Richard S., G. Zimba, Carl, Peterson, Richard C., Flynn, Kathleen M., Fujimoto, James G., Bouma, Brett E.

“…Optical coherence tomography (OCT) is a nondestructive and noncontact technique to image microstructure within scattering media. The application of OCT to…”
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A terminally anchored polymer chain in shear flow : self-consistent velocity and segment density profiles by PARNAS, R. S, COHEN, Y

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Influence of processing rate and formulation on the interface strength of vinyl ester/E-glass composites by McDonough, W. G., Dunkers, J. P., Holmes, G. A., Feresenbet, E., Kim, Y. H., Parnas, R. S.

“…The single fiber fragmentation test was used to investigate the effect of gelation time on interfacial shear properties of fast reacting resin systems. We…”
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Sensor placement study for online flow monitoring in liquid composite molding by Kueh, Sylvia R. M., Advani, Suresh G., Parnas, Richard S.

“…On‐line sensing can play an important part in controlling the quality of the final product in any manufacturing environment, including liquid composite molding…”
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Cure monitoring of the liquid composite molding process using fiber optic sensors by Woerdeman, Dara L., Spoerre, Julie K., Flynn, Kathleen M., Parnas, Richard S.

“…Fluorescence has been demonstrated to be an accurate tool for monitoring resin cure. It is measured using an evanescent wave fiber‐optic sensor. An economical…”
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A mid-infrared attenuated total internal reflection cure sensor for control of resin transfer moulding of a pre-ceramic polymer by Dunkers, Joy P., Flynn, Kathy M., Parnas, Richard S.

“…An attenuated total internal reflection (ATR) mid-infra red (m.i.r.) sensor has been constructed and interfaced with a resin transfer moulding (RTM) system to…”
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New set-up for measurement of permeability properties of fibrous reinforcements for RTM by Hoes, Kris, Dinescu, Daniela, Sol, Hugo, Vanheule, Marleen, Parnas, Richard S., Luo, Yiwen, Verpoest, Ignaas

“…Resin transfer molding (RTM) is becoming increasingly important as a production technique for FRPs. However, the design of molds that assures the production of…”
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Use of a charged coupled device (CCD) camera for evanescent wave optical fiber cure monitoring of liquid composite molding resins by Neff, Raymond A., Woerdeman, Dara L., Parnas, Richard S.

“…An optical fiber evanescent wave fluorescence cure sensor described in a previous paper (1) has been interfaced with a fast detector and computer software to…”
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Visualization and quantification of forced in-plane flow through deformed porous media by Friedman, Henry L., Johnson, Robert A., Gusev, Vladimir, Neimark, Alexander V., Buvel, Dianne, Salem, David R., Parnas, Richard S.

“…Fluid flow in liquid molding processes and in other applications involving porous media is often characterized with a permeability tensor and modeled by…”
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Forced in-plane flow through complex deformable structures: Influence of an imposed curve by Friedman, Henry L., Johnson, Robert A., Miller, Bernard, Salem, David R., Parnas, Richard S.

“…Forced in‐plane flow of liquids through contiguous flat and curved regions of confined fabrics has been studied both as a general phenomenon and for predicting…”
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A methodology for using long-period gratings and mold-filling simulations to minimize the intrusiveness of flow sensors in liquid composite molding by Kueh, Sylvia R.M., Parnas, Richard S., Advani, Suresh G.

“…In liquid composite molding (LCM), a fiber preform is placed in the mold and a thermoset resin is injected into the closed mold cavity to occupy the spaces in…”
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A permeability database for composites manufacturing by Parnas, Richard S., Flynn, Kathleen M., Dal-Favero, Mary E.

“…The National Institute of Standards and Technology (NIST) has developed a database containing a set of permeability results from carefully controlled…”
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Fiber optic flow and cure sensing for liquid composite molding by Dunkers, Joy P., Lenhart, Joseph L., Kueh, Sylvia R., van Zanten, John H., Advani, Suresh G., Parnas, Richard S.

“…The Polymer Composites group at the National Institute of Standards and Technology has efforts in both on-line flow and cure sensing for liquid composite…”
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The application of optical coherence tomography to problems in polymer matrix composites by Dunkers, Joy P., Phelan, Frederick R., Sanders, Daniel P., Everett, Matthew J., Green, William H., Hunston, Donald L., Parnas, Richard S.

“…The Composites Group at the National Institute of Standards and Technology has found optical coherence tomography (OCT) to be a powerful tool for…”
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