Influences of interface and surface pretreatment on the mechanical properties of metal-CFRP hybrid structures manufactured by resin transfer moulding

A study on the effect of the vacuum assisted resin transfer moulding (VARTM) manufacturing process on the mechanical properties of cotton/epoxy composite is presented in this investigation. Woven cotton was used as reinforcing material embedded in epoxy resin. The woven cotton was treated with sodium hydroxide for one hour at concentrations of 0% to 20%. The tensile test showed that the untreated material had the highest ultimate strength and Young’s modulus. Observation of the fracture surface by scan electronic microscopy (SEM) was compared to the hand lay-up process as well as the results of the tensile test. The comparison showed that the VARTM process presents better mechanical properties than the hand lay-up process due to the reduction in discontinuities observed by means of optical microscopy.

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Interpenetrating Vinylester/Epoxy Resins Reinforced by Flax Fibre Mat

Advanced Composites Letters ◽

10.1177/096369350301200304 ◽

2003 ◽

Vol 12 (3) ◽

pp. 096369350301200 ◽

Cited By ~ 5

Author(s):

J. S. Szabo ◽

G. Romhany ◽

T. Czigany ◽

J. Karger-Kocsis

Keyword(s):

Mechanical Properties ◽

Epoxy Resins ◽

Mechanical Performance ◽

Flax Fibre ◽

Mechanical Anisotropy ◽

Resin Transfer Moulding ◽

Interpenetrating Network ◽

Flax Fibres ◽

Flexural Loading ◽

Transfer Moulding

Vinylester/epoxy (VE/EP) hybrid resins of interpenetrating network (IPN) structure were reinforced by needled flax fibre mat. The flax content of the composites was kept constant (20 wt%) whereas the VE/EP ratio varied (70/30, 50/50, and 30/70). The mechanical properties of the composites, produced by resin transfer moulding, were determined in tensile and flexural loading. The mechanical anisotropy detected was traced to the orientation of the flax fibres during carding. The higher was the VE content of the hybrid IPN resin the better the mechanical performance was.

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Mechanical properties of microwave cured glass fibre epoxy composites prepared by resin transfer moulding

Journal of Composite Materials ◽

10.1177/0021998314557295 ◽

2014 ◽

Vol 49 (23) ◽

pp. 2839-2847 ◽

Cited By ~ 7

Author(s):

Stefan Maenz ◽

Mike Mühlstädt ◽

Klaus D Jandt ◽

Jörg Bossert

Keyword(s):

Mechanical Properties ◽

Glass Fibre ◽

Epoxy Composites ◽

Resin Transfer Moulding ◽

Transfer Moulding

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Effect of Stitching Density of Nonwoven Fiber Mat towards Mechanical Properties of Kenaf Reinforced Epoxy Composites Produced by Resin Transfer Moulding (RTM)

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.471-472.987 ◽

2011 ◽

Vol 471-472 ◽

pp. 987-992 ◽

Cited By ~ 15

Author(s):

Muhamad Saifuddin Salim ◽

Zainal Arifin Mohd Ishak ◽

Suhail Abdul Hamid

Keyword(s):

Mechanical Properties ◽

Natural Fibre ◽

Epoxy Composites ◽

Resin Transfer Moulding ◽

Kenaf Fiber ◽

Fiber Loading ◽

Kenaf Fibre ◽

Nonwoven Fiber ◽

Transfer Moulding ◽

Fibre Loading

This study will focus on the usage of kenaf as a natural fibre in producing a composite materials consists of epoxy resin by resin transfer moulding (RTM). The variation amount of fiber loading and nonwoven fibre mat condition seems can give significant changes in properties of polymer composite in terms of mechanical aspects. Optimization of stitching density of nonwoven kenaf fibre mat manages to increase the mechanical behaviour. At higher degree of fibre loading, these enhancement properties are more apparent. Depending upon the direction of stitching process in producing nonwoven kenaf fiber mat, the composite obtained exhibit anisotropy behaviour in which the mechanical properties are vary upon the stitching direction of nonwoven mat.

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Numerical simulations for class A surface finish in resin transfer moulding process

Composites Part B Engineering ◽

10.1016/j.compositesb.2011.06.002 ◽

2012 ◽

Vol 43 (2) ◽

pp. 819-824 ◽

Cited By ~ 8

Author(s):

Geneviève Palardy ◽

Pascal Hubert ◽

Eduardo Ruiz ◽

Mohsan Haider ◽

Larry Lessard

Keyword(s):

Numerical Simulations ◽

Surface Finish ◽

Resin Transfer Moulding ◽

Moulding Process ◽

Class A ◽

Transfer Moulding

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Permeability Prediction in the Impregnation Stage of Resin Transfer Moulding

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.160-162.1211 ◽

2010 ◽

Vol 160-162 ◽

pp. 1211-1216

Author(s):

Zhuang Liu ◽

Xiao Qing Wu

Keyword(s):

Stokes Equations ◽

Approximate Model ◽

Local Deformation ◽

Resin Transfer Moulding ◽

Moulding Process ◽

2D Simulation ◽

Macro Scale ◽

Darcy Equations ◽

Transfer Moulding ◽

Meso Scale

The impregnation stage of the Resin Transfer Moulding process can be simulated by solving the Darcy equations on a mould model, with a ‘macro-scale’ finite element method. For every element, a local ‘meso-scale’ permeability must be determined, taking into account the local deformation of the textile reinforcement. This paper demonstrates that the meso-scale permeability can be computed efficiently and accurately by using meso-scale simulation tools. We discuss the speed and accuracy requirements dictated by the macro-scale simulations. We show that these requirements can be achieved for two meso-scale simulators, coupled with a geometrical textile reinforcement modeller. The first solver is based on a finite difference discretisation of the Stokes equations, the second uses an approximate model, based on a 2D simulation of the flow.

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Effect of Fiber’s Surface Pretreatment on the Interfacial Bonding Strength between Steel Fiber and Resin

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.989-994.177 ◽

2014 ◽

Vol 989-994 ◽

pp. 177-180

Author(s):

Hao Yang ◽

Jian Hua Zhang ◽

Guo Yan Sun ◽

Yi Zhang

Keyword(s):

Mechanical Properties ◽

Cast Iron ◽

Bonding Strength ◽

Steel Fiber ◽

Resin Composite ◽

Interfacial Bonding ◽

Steel Fibers ◽

Surface Pretreatment ◽

Interfacial Bonding Strength ◽

Coupling Treatment

For the characteristic that the mechanical properties of resin composite are lower than cast iron, steel fibers are used to improve its properties in this paper. A weak interfacial bonding strength between steel fibers and resin indicates that steel fibers’ property cannot perform well in the polymer. In order to improve the interfacial bonding strength, four methods of surface treatment, phosphating, acid pickling, oxidation, and coupling are applied to steel fibers, and the corresponding pull-off tests are carried out to compare with untreated steel fibers. Research results show that the maximum interfacial bonding strength is increased by 45.1% after coupling treatment.

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