scholarly journals PERBANDINGAN NILAI KEKUATAN TARIK KOMPOSIT MENGGUNAKAN METODE HAND LAY UP DAN METODE VARI

2019 ◽  
Vol 9 (2) ◽  
pp. 24-26
Author(s):  
Lega Putri Utami ◽  
Delovita Ginting ◽  
Ahmad Kafrawi Nasution ◽  
Budi Istana
Keyword(s):  
Tensile Strength ◽  
Composite Materials ◽  
Polyester Resin ◽  
Resin Composites ◽  
Resin Infusion ◽  
Palm Fronds ◽  
Palm Frond

Some Types of the method of making composite materials are the Vacuum Assited Resin Infusion (VARI) Method and the Hand Lay Up Method. The purpose of this study was to compare the tensile strength of composite materials made using the hand lay up and VARI methods. The types of fibers used as composite materials are palm frond fibers and matrices used in polyester resin. Composites reinforced with palm fronds are printed using the hand lay up and VARI methods. The results showed the value of composite tensile strength with the hand lay up method of 27.37 MPa and composite tensile strength using the VARI method of 28.40 MPa. From the results of the study, the differences in the tensile strength values of the two methods were obtained.

scholarly journals A Study on Tensile Strengths of Randomly Oriented Coir/Plantain Hybrid Fiber Reinforced Polyester (CPFRP) Composites

2020 ◽  
Vol 5 (2) ◽  
pp. 138-145
Author(s):  
Christian Ebele Chukwunyelu ◽  
A. W. Nwosu ◽  
Innocent Tochukwu Uzoghelu
Keyword(s):  
Tensile Strength ◽  
Polyester Resin ◽  
Volume Fraction ◽  
Testing Machine ◽  
Quality Characteristics ◽  
Resin Composites ◽  
Fiber Reinforced ◽  
Hybrid Fiber ◽  
Hybrid Fibers ◽  
Control Factors

This study focuses on determining the optimum tensile strengths of randomly oriented coir/plantain hybrid fiber reinforced polyester resin composites. The control factors of volume fraction, coupling agent and coir/plantain fiber ratio were used in forming the samples. Tensile test was conducted on the samples of Coir/plantain empty fruit bunch (CEFB) hybrid fibers and coir/plantain pseudo stem (CPS) hybrid fibers reinforced polyester resin composites respectively for the optimum tensile strengths. An OKH-600 Digital Display universal Testing Machine was used for conducting tensile tests in order to establish the control factor levels quality characteristics needed to optimize the mechanical properties being investigated. The highest signal-to-noise ratio (S/N ratio) for the quality characteristics was investigated by applying Taguchi robust design technique for the greater-the-better. The optimum values of the control factors were established for CEFB and CPS hybrid fibers reinforced polyester resin composites. The CEFB hybrid fibers reinforced polyester resin composites has the optimum tensile strength of while CPS hybrid fibers reinforced polyester resin composites has the optimum tensile strength of . The control factors contributed greatly to the tensile strength; and the CEFB hybrid fibers reinforced polyester resin composites are less in tension than that of CPS hybrid fiber.

scholarly journals Mineral fillers modified by shoulders from deodoration columns of oil and fat products

2021 ◽  
Vol 4 (1) ◽  
pp. 206-212
Author(s):  
M. R. Chobit ◽  
◽  
V. P. Vasylyev ◽  
Yu. V. Panchenko ◽  
◽  
...  
Keyword(s):  
Fatty Acids ◽  
Tensile Strength ◽  
Polymer Composites ◽  
Magnesium Hydroxide ◽  
Polyester Resin ◽  
Relative Elongation ◽  
Resin Composites ◽  
Maximum Increase ◽  
Mineral Fillers ◽  
First Time

The aim of the work was to investigate for the first time the possibility of modification of disperse mineral fillers (chalk and magnesium hydroxide) deodorizing shoulder straps containing fatty acids obtained by refining sunflower oil for create filled polymer composites. In the study of composites based on PVC found an increase in their tensile strength, strength reaches almost 50 % increases. Accordingly, the relative elongation of these polymer composites increases. Shown to increase toughness with increasing content of modifier, with a greater increase in toughness for chalk than magnesium hydroxide for polyester resin composites. The maximum increase of toughness is more than 50 %. Thermomechanical studies have shown that the heat resistance of composites mainly increases with modified fillers.

scholarly journals Effect of Fractal-Based Fiber Clustering on Tensile Properties of BFRP

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Jingjing He ◽  
Junping Shi ◽  
Yong Zhang ◽  
Yali Bi ◽  
Lihao Fan
Keyword(s):  
Tensile Strength ◽  
Composite Materials ◽  
Epoxy Resin ◽  
Volume Fraction ◽  
Fractal Theory ◽  
Basalt Fiber ◽  
Strength Prediction ◽  
Resin Composites ◽  
Fiber Clustering ◽  
Epoxy Resin Composites

To explore the clustering phenomenon of discontinuous fibers in composite materials, this paper deduces the fiber uniform distribution coefficient and analytical expressions of fiber clustering content based on fractal theory and establishes a tensile strength prediction model of fiber/epoxy resin composite materials containing cluster fibers. With basalt fiber/epoxy resin composites (BFRP) as an example, this paper analyzes the tensile strength law of BFRP under fiber clustering effect. The results show that when the fiber volume fraction is constant, the tensile strength of the composite in the presence of agglomerated fibers is only related to the fractal dimension of the circumference and cross-sectional area of the inner fiber agglomerate. The calculated value of the composite tensile strength based on fractal theory is lower than the experimental value, but closer to the experimental value than the approximate method. The research conclusions can provide theoretical support for strength prediction of fiber/epoxy resin composites.

scholarly journals The Effect of Fiber Length on Tensile Properties of Polyester Resin Composites Reinforced by the Fibers of Sansevieria trifasciata

2014 ◽  
Vol 8 ◽  
pp. 7-13 ◽  
Author(s):  
Palla Hari Sankar ◽  
Y.V. Mohana Reddy ◽  
K. Hemachandra Reddy ◽  
M. Ashok Kumar ◽  
A. Ramesh
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Tensile Properties ◽  
Tensile Testing ◽  
Fiber Length ◽  
Polyester Resin ◽  
Resin Composites ◽  
Elongation At Break ◽  
Polyester Composites ◽  
Scanning Electron

This paper presents the study of the tensile properties of Sansevieria trifasciata – fiber (here after called STF) reinforced polyester composites. The composite sample was fabricated with five different fiber lengths of STF (2, 4, 6, 8 and 10 mm). The fabrication was made by hand lay-up technique. Mechanical properties were determined using tensile testing. An interact between fiber and matrix was observed from the SEM (scanning electron microscope) micrographs. The study reveals that the tensile strength increased with fiber length without effecting the elongation at break of the composite.

scholarly journals Analisa Pengaruh Absorpsi Air Laut Terhadap Kekuatan Tarik Komposit Serat Pelepah Sawit

2017 ◽  
Vol 4 (2) ◽  
pp. 73
Author(s):  
Zulkifli Zulkifli ◽  
Hadi Hermansyah ◽  
Syahruddin Syahruddin
Keyword(s):  
Tensile Strength ◽  
Sea Water ◽  
Fiber Composite ◽  
Water Immersion ◽  
Composite Plates ◽  
Test Results ◽  
Test Procedures ◽  
The Third ◽  
Palm Fronds ◽  
Palm Frond

This study aims to analyze the absorption of sea water on Composite Materials palm frond fibers per 24 hours for 9 days and analyze the effect of immersion for 3, 6, and 9 days of the tensile strength fiber-reinforced composite material of palm fronds. The polymers used type of epoxy resin. Palm frond fibers arranged randomly, then fiber treated alkali 5% for 2 hours, and then molded with a size of 200 x 200x 5 mm with a ratio between matrix and fiber is 90:10 to press molding tool. Composite plates immersed in a container filled with sea water aquarium for 3, 6, and 9 days and every 24 hours of material in weigh, test procedures seawater absorption refers to the ASTM D 570 - 98. As well as every 3, 6, and 9 days plate removed and cut into a polymer composite beam according to the standard ASTM D638-02 (type 1). Each variable will be tested for 3 times. Based on the test results get soaking in the absorption rate reached its peak in the first day, namely 0.26% for the first specimen testing three-day, 0.5% for the second specimen testing 6 days and 0.25% for the third specimen testing nine days. Then it will go on steadily and decreases until it reaches saturation point. Where for the first specimen in the third day of absorption of 0.49%, a second specimen in the sixth day of absorption of 1.71%, and the third specimen in the esembilan absorption 0.93%. And the influence of sea water immersion tensile strength fiber Composite palm fronds have a dynamic effect on the test results before immersion up to 9 days of immersion that is power up and down. With a value of 15.468 MPa before immersion, 17.046 MPa 3 days of immersion, 15.107 MPa 6 day immersion, and 21.137 MPa 9 days of immersion.

scholarly journals Development of Detailed FE Numerical Models for Assessing the Replacement of Metal with Composite Materials Applied to an Executive Aircraft Wing

Aerospace ◽  
2021 ◽  
Vol 8 (7) ◽  
pp. 178
Author(s):  
Valerio Acanfora ◽  
Roberto Petillo ◽  
Salvatore Incognito ◽  
Gerardo Mario Mirra ◽  
Aniello Riccio
Keyword(s):  
Composite Material ◽  
Composite Materials ◽  
Numerical Model ◽  
Numerical Models ◽  
Structural Performance ◽  
Aircraft Wing ◽  
Resin Infusion ◽  
Effectiveness Analysis ◽  
Liquid Resin Infusion ◽  
Process Constraints

This work provides a feasibility and effectiveness analysis, through numerical investigation, of metal replacement of primary components with composite material for an executive aircraft wing. In particular, benefits and disadvantages of replacing metal, usually adopted to manufacture this structural component, with composite material are explored. To accomplish this task, a detailed FEM numerical model of the composite aircraft wing was deployed by taking into account process constraints related to Liquid Resin Infusion, which was selected as the preferred manufacturing technique to fabricate the wing. We obtained a geometric and material layup definition for the CFRP components of the wing, which demonstrated that the replacement of the metal elements with composite materials did not affect the structural performance and can guarantee a substantial advantage for the structure in terms of weight reduction when compared to the equivalent metallic configuration, even for existing executive wing configurations.

scholarly journals Synthesis, Characterization and Testing of Antimicrobial Activity of Composites of Unsaturated Polyester Resins with Wood Flour and Silver Nanoparticles

Materials ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1122
Author(s):  
Przemysław Pączkowski ◽  
Andrzej Puszka ◽  
Malgorzata Miazga-Karska ◽  
Grażyna Ginalska ◽  
Barbara Gawdzik
Keyword(s):  
Silver Nanoparticles ◽  
Staphylococcus Epidermidis ◽  
Polyester Resin ◽  
Wood Flour ◽  
Unsaturated Polyester ◽  
Thermomechanical Properties ◽  
Resin Composites ◽  
Polyester Resins ◽  
Before And After

This paper presents the properties of the wood-resin composites. For improving their antibacterial character, silver nanoparticles were incorporated into their structures. The properties of the obtained materials were analyzed in vitro for their anti-biofilm potency in contact with aerobic Gram-positive Staphylococcus aureus and Staphylococcus epidermidis; and aerobic Gram-negative Escherichia coli and Pseudomonas aeruginosa. These pathogens are responsible for various infections, including those associated with healthcare. The effect of silver nanoparticles incorporation on mechanical and thermomechanical properties as well as gloss were investigated for the samples of composites before and after accelerating aging tests. The results show that bacteria can colonize in various wrinkles and cracks on the composites with wood flour but also the surface of the cross-linked unsaturated polyester resin. The addition of nanosilver causes the death of bacteria. It also positively influences mechanical and thermomechanical properties as well as gloss of the resin.

scholarly journals A novel h-BN–RGO hybrids for epoxy resin composites achieving enhanced high thermal conductivity and energy density

RSC Advances ◽  
2017 ◽  
Vol 7 (38) ◽  
pp. 23355-23362 ◽  
Author(s):  
Tao Huang ◽  
Xiaoliang Zeng ◽  
Yimin Yao ◽  
Rong Sun ◽  
Fanling Meng ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Composite Materials ◽  
Energy Density ◽  
Epoxy Resin ◽  
High Thermal Conductivity ◽  
Resin Composites ◽  
Epoxy Resin Composites ◽  
Significant Attention

In recent decades, significant attention has been focused on developing composite materials with high thermal conductivity utilizing h-BN, which has outstanding thermal conductivity.

scholarly journals High Mechanic Enhancement of Chopped Carbon Fiber Reinforced-Low-Density Unsaturated Polyester Resin Composite at Low Preparation Temperature with Facile Polymerization

Materials ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4273
Author(s):  
Jian Zhang ◽  
Xiaojun Wang ◽  
Xinjun Fu
Keyword(s):  
Composite Materials ◽  
Carbon Fiber ◽  
Low Temperature ◽  
Surface Defect ◽  
Polyester Resin ◽  
Unsaturated Polyester ◽  
Unsaturated Polyester Resin ◽  
Low Density ◽  
Fiber Reinforced ◽  
Preparation Temperature

Chopped carbon fiber-reinforced low-density unsaturated polyester resin (CCFR-LDUPR) composite materials with light weight and high mechanical properties were prepared at low temperature and under the synergistic action of methyl ethyl ketone peroxide (MEKP-II) and cobalt naphthenate. Optimal preparation conditions were obtained through an orthogonal experiment, which were preparation temperature at 58.0 °C, 2.00 parts per hundred of resin (phr) of NH4HCO3, 4.00 phr of chopped carbon fibers (CCFs) in a length of 6.0 mm, 1.25 phr of initiator and 0.08 phr of cobalt naphthenate. CCFR-LDUPR composite sample presented its optimal properties for which the density (ρ) was 0.58 ± 0.02 g·cm−3 and the specific compressive strength (Ps) was 53.56 ± 0.83 MPa·g−1·cm3, which is 38.9% higher than that of chopped glass fiber-reinforced low-density unsaturated polyester resin (CGFR-LDUPR) composite materials. Synergistic effects of initiator and accelerator accelerated the specific polymerization of resin in facile preparation at low temperature. Unique “dimples”, “plate microstructure” and “surface defect” fabricated the specific microstructure of the matrix of CCFR-LDUPR composite samples, which was different from that of cured unsaturated polyester resin (UPR) with “body defect” or that of CGFR-LDUPR with coexistence of “surface defect” and “body defect”.

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