A comparative study of vacuum‐assisted resin transfer molding (VARTM) for sandwich panels

Dai, Jinyue; Pellaton, D.; Hahn, Hoh‐Gyu

doi:10.1002/pc.10061

Cited by 31 publications

(23 citation statements)

References 7 publications

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“…To narrow the window of variable physical parameters, the design of experiments requires a solid understanding of flow through these structures. [7][8][9][10][11] The presence of the moving front separating the impregnated liquid from the displaced one ͑e.g., oil from water in petroleum engineering or air from penetrating liquid in composite and absorbency technologies͒ makes the problem complicated. In composite manufacturing applications, the description of flow through laminated materials is mostly limited by the hydraulic approximation ͑see, for example, Ref.…”

Section: Introductionmentioning

confidence: 99%

Impregnation of liquids into a laminated porous material with a high permeability contrast

Alimov

Kornev

2007

Physics of Fluids

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This paper sets the physical basis for an efficient method designed to fill low permeable porous materials with liquids. Fast filling of these materials is achieved if one sandwiches a slightly permeable sample between highly permeable layers. We derived a useful engineering formula for the front speed as a function of the layer permeability and thickness. An asymptotic analysis of the two-dimensional liquid flow with moving front is performed assuming that the covering layers are much thinner than the sample thickness. It is shown that the front forms sawteeth with the tooth apexes moving along the highly permeable layers. If the surface layers are made of the same material, two sawteeth are mirror symmetric with respect to the sample midplane. The angle which they form drastically depends on the ratio of layer-to-sample permeabilities and on the ratio of skin-to-core thicknesses. The theory presented in this paper can be used to optimize the processes of impregnation of nanostructured materials.

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Section: Introductionmentioning

confidence: 99%

Impregnation of liquids into a laminated porous material with a high permeability contrast

Alimov

Kornev

2007

Physics of Fluids

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“…Many RIFT methods rely on through thickness flow, as implemented in the TPI SCRIMP process by means of a highly permeable distribution media, 23 channels engraved in a constraining rigid plate 24 or in the core of sandwich panels. 25 It is thus important to check the feasibility of flow through the preform thickness (iii) stiff pins present obstacles for in-plane flow, which may lead to the possible formation of dry areas in close proximity to them; Along with these negative factors, an optimized design of the pin pattern can be used to address the issues of permeability and flow control. For example, the diagonal pin pattern in Fig.…”

Section: Liquid Molding Of Preconsolidated Preformsmentioning

confidence: 99%

Stabilizing textile preforms by means of liquid resin print: a feasibility study

Ivanov

White²,

Hendry

et al. 2014

Advanced Manufacturing: Polymer & Composites Science

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This study demonstrates the feasibility of creating stable, preconsolidated, yet permeable preforms for liquid resin infusion (RIFT) manufacture of composite materials. While being one of the cheapest and simplest methods of composites manufacture, RIFT with flexible tooling is known for high risk of dimensional and internal defects due to insufficient consolidation of textile preforms. Achieving the quality of a rigid mold solution, at the cost and simplicity of a flexible mold process, is the principal challenge of the RIFT.The approach presented suggests stabilizing a compliant preform through pointwise and highly controlled integration of a binder, and its consolidation prior to liquid molding. The printed resin creates a stiff skeleton, securing material for resin infusion and curing. This study explores the feasibility and efficiency of novel binding techniques, and the effects it may have on preform properties. Successful implementation of the concept for a multiply woven preform is demonstrated and the concept potential is discussed.

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“…[17] Abaca fabric stands out better than Abaca fibers as it exhibits uniform properties throughout the composite and also nullify the phenomenon of pull out from the composite. [19] VARTM, compared to other commonly used fabricating methods like compression molding or hot press produces lower volatile emission of the organic compounds which is potentially harmful for the humans. Lower cost of manufacturing with improved mechanical properties of the composite can be fabricated using this versatile technique.…”

Section: Introductionmentioning

confidence: 99%

“…[15] Vacuum Assisted Resin Transfer Molding technique is a well-established composite manufacturing method in the engineering sector. [19] The objective for this research study was purely to improvise the properties of Vinyl ester resin in terms of brittleness and bond ability with the fiber so as to enhance the overall performance of the natural fiber composites during practical applications. [18] It is an excellent technique for manufacturing medium and large scale, single sided mold composite structures, such as wind turbine blades and yachts.…”

Section: Introductionmentioning

confidence: 99%

Influence of silane‐modified Vinyl ester on the properties of Abaca fiber reinforced composites

et al. 2017

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The versatility of the fiber reinforced composites has significantly replaced some of the sophisticated metal components in certain sectors of industries. The matrix could be altered to improve self-properties via silane modifiers by forming chemical linkages with the matrix in harmony with the reinforcing agents. This research work is an endeavor to enhance the traits of Vinyl ester by scrutinizing the influence of silane chemical agents using Hexamethyldisiloxane (HMDS). The dispersion time and concentration of these chemicals in matrix were optimized and henceforth a natural reinforcement, Abaca fabric was incorporated to constitute Natural fiber composite via Vacuum Assisted Resin Transfer Molding (VARTM) technique. The effect of resin modification on mechanical, thermal, and physical properties of Vinyl ester/Abaca (VE/AF) composite was examined. HMDS resin modified composite showed an improvement in the mechanical and flame retardant properties when compared to the pristine composite due to the formation of siloxane bonding which is compatible with the functional groups of both the matrix and the fabric. FT-IR and FESEM characterizations have showed imperative evidences to support the results. This investigation provides a channel for enhancing the properties of natural fiber composites via chemical modification technique. K E Y W O R D SAbaca fibers, flame retardancy, Hexamethyldisiloxane, mechanical properties, Vinyl ester

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A comparative study of vacuum‐assisted resin transfer molding (VARTM) for sandwich panels

Cited by 31 publications

References 7 publications

Impregnation of liquids into a laminated porous material with a high permeability contrast

Impregnation of liquids into a laminated porous material with a high permeability contrast

Stabilizing textile preforms by means of liquid resin print: a feasibility study

Influence of silane‐modified Vinyl ester on the properties of Abaca fiber reinforced composites

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