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2021
Research on material engineering is widely developed in the precursors, composition of the material, and technique to create a composite. The layering and vacuum infusion resin are the developing technique to create the composites with the new characteristics and properties. This experiment is intended to find out the characteristics of layering carbon fiber reinforced by resin and is molded with vacuum infusion technique. The specimens of this experiment is layered-carbon fiber composites determined in three, four, five, six, and seven layers. The precursors of 220 and 240 carbon fibers are the main material of the composites. The tests conducted to the specimens are bending and tensile tests. The both tests are treated to reveal the mechanical properties of the composites. The least layers of 220 and 240 carbon fiber result the highest value of bending test, but the most number of carbon fiber layers show the opposite value. The results are reverse in the tensile test. The highest...
2017 •
Fiber-reinforced composite materials are used in various applications in aviation, maritime, sport, automotive, and defense industry due to their several advantages. Beside this, they have some disadvantages. The behavior of hybrid composites is a weighed sum of the individual components in which there is a more favorable balance between the inherent advantages and disadvantages. The aim of this study is to develop of the carbon-glass fabric reinforced polyester hybrid composites. PA66 nonwoven fabrics were also incorporated within the composite laminates to modify interlaminar region. The results show the addition of the PA66 nonwoven fabrics affects the mechanical properties in hybrid composite.
Liquid resin infusion processes are becoming attractive for aeronautic applications as an alternative to conventional autoclave-based processes. They still present several challenges, which can be faced only with an accurate simulation able to optimize the process parameters and to replace traditional time-consuming trial-and-error procedures. This paper presents an experimentally validated model to simulate the resin infusion process of an aeronautical component by accounting for the anisotropic permeability of the reinforcement and the chemophysical and rheological changes in the crosslinking resin. The input parameters of the model have been experimentally determined. The experimental work has been devoted to the study of the curing kinetics and chemorheological behavior of the thermosetting epoxy matrix and to the determination of both the in-plane and out-of-plane permeability of two carbon fiber preforms using an ultrasonic-based method, recently developed by the authors. The ...
Journal of Composite Materials
A new cost-saving vacuum infusion process for fiber-reinforced composites: Pulsed infusion2014 •
Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics
Testing the Bending Strength of Carbon Fiber Composites using the vacuum infusion and vacuum bagging method on the UAV Skywalker 1900 Fuselage MaterialThe purpose of this study was to determine the bending strength of carbon fiber composite materials with lycal epoxy resin on the Skywalker 1900 UAV. Composites will be made for test specimens with carbon fiber combined with lycal resin using vacuum infusion printing and vacuum bagging methods. From these two methods a sample of specimens will be made for testing using a bending test using the three point bending method to determine the bending strength value of the fuselage material. As for another test, namely microphotos, the process of observing this microstructure can find out how the shape, size, and distribution of second phase particles have an important role in knowing the properties of the material itself. The results of the test specimens were compared between vacuum infusion printing and vacuum bagging and then the best value was sought between the two methods. The results were obtained after testing where the two methods of printing and micro-photos obtained the best re...
The desertion work describes the mechanical properties of new polymer composites consists of carbon fiber reinforcement, epoxy resin and filler materials like ZrO2 and Sic. Experiments like tensile test, bending test, impact test are conducted to find the significant influence of filler material on mechanical properties of carbon fiber reinforcement plastics composites, The test result have shown that higher the filler material volume percentage greater the strength for both ZrO2 and Sic filled carbon epoxy composites, Sic filled composites show more sustaining values than ZrO2.
2021 •
To evaluate tensile strength of the carbon composite material we used method of static tensile test according to the STN EN ISO 6892-1:2010-01 standard. The material for the production samples from the composite material was carbon fabrics KORDCARBON 200g/m2 – Twill weave. KORDCARBON 160g/m2 – Plain weave reinforced with epoxy resin Letoxid PR220+hardener EM315. The carbon composite for the test was prepared by Hand lay-up technology and Vacuum Bag molding method. Orientation to the layer laying direction of the individual samples in the test composite material influences the mechanical properties of the carbon fiber composite material produced by Hand lay-up technology and VMB- Vacuum molding bag method.
The effect of addition of a membrane layer in vacuum infusion process was investigated with emphasis being placed on the flexural properties and void content of the resulting composites. E-glass fiber and epoxy were, respectively, used as filler and matrix constituents to produce the composites. Conducting a facile TGA based methodology, fiber volume fraction, density, and void content measurements were carried out on the samples taken from different zones across the composite parts. Despite giving rise to the composite thickness, 16 % high compared to the part thickness produced by vacuum infusion without any membrane, infusion with incorporation of the membrane layer resulted in a relatively high composite fiber volume fraction with reduced void content at no expense of compaction. At the vacuum port, flexural strength and modulus values of the composites produced by membrane added vacuum infusion process (MAVIP) were found to be, respectively, 11 and 8 % higher than those of the composites produced by conventional vacuum infusion process (CVIP). On the other hand, at the inlet port, composites produced by MAVIP exhibited 12 and 9 % high flexural strength and modulus values compared to those produced by CVIP. Moreover, the load-deflection response (P/) of the samples taken from different zones along the parts was correlated with respect to their length-to-width aspect ratio (L/b) based on the plane strain analytical approach. Once L/b aspect ratio was greater than 6.5, plane strain approach was found to converge to more definite beam modulus values, regardless of the process used.
Tensile and compression tests are a part of the qualification process for composite parts in aircraft structures. With each new material, a new set of tests is required. To reduce costs, it is advantageous to develop analysis tools for the prediction of damages and failure in such tests, so that the amount of testing can be reduced and predictions about material behavior can be made early in the design process. In this paper, an experimental and numerical study is presented on the tensile and compression strength of composite material developed by Alenia Aeronautica for aerospace applications and produced by means of the resin film infusion (RFI) and stitching process. Tensile and compression tests have been performed on specimens with three different lay-ups: 33/33/33, 40/40/20 and 100/0/0. They refer to the percentage of oriented fibres for each layer along three directions (0°/±45°/90°). The data observed are being used to develop a method for predicting the tensile and compression strength, and the numerical results are compared with the experimental ones.
2012 •
The scope of the study is to evaluate the behaviour of exemplary glass fibre preforms during the vacuum infusion process. The reinforcing preforms were prepared from: plain weave crimp fabric, chopped strand mat (with two alternative binders polyester-appropriate and universal), a unidirectional (UD) fabric and a 3 mm PARABEAM® 3D rising fabric. ESTROMAL 14 polyester resin was used as the matrix. All the laminates showed a fibre volume fraction in the range of 49÷52%. The permeability analysis was conducted with the use of PAM-RTM software by the ESI GROUP. As the base for the analysis, measured experimental saturation times were used. It is probably the simplest method to determine the permeability of fibrous preforms. The plain weave fabric showed a satisfactory saturation time (less than 9 min for 250 mm preform section) and permeability (5.66·10 m). The infusion process proceeded in a stable way and the resin front ran uniformly along the whole width of the preform. The chopped ...
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