The Influence of Sample Preparation on the Strength Results ofa Pan-based Carbon Fiber

In this work the influence of different configurations in the sample preparation process on commercial polyacrylonitrile-based carbon fibers mechanical tests were studied. Mechanical properties, such as tensile strength, Young’s modulus, elongation and Weibull modulus, were evaluated. The results showed that all sample preparation steps may have strong influence on the results.

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Evaluation of Composite Material used in the Wings of Typical Airplane based on Stress Analysis

European Journal of Engineering Research and Science ◽

10.24018/ejers.2018.3.11.921 ◽

2018 ◽

Vol 3 (11) ◽

pp. 37-41

Author(s):

Tawfeeq W. Mohammed ◽

Dalmn Yaseen Taha ◽

Rafal R. Abdul-Ilah

Keyword(s):

Experimental Data ◽

Mechanical Properties ◽

Tensile Strength ◽

Composite Material ◽

Carbon Fiber ◽

Glass Fiber ◽

Raw Materials ◽

Stress Test ◽

Mechanical Tests ◽

Bending Stress

This research has focused on the evaluation of raw materials that used in the wings of modern airplane. These materials either would be fiberglass, carbon-fiber or aramid based composites like Kevlar. These common materials have been selected and evaluated depending on experimental data obtained from mechanical tests. These tests include: hardness, tensile strength and bending stress. The tests based on ASTM standards for mechanical properties. The results show increasing in the hardness value of graphite-epoxy by 9% comparing with that of fiberglass and by 18% comparing with that of Kevlar-epoxy. The results also show an increasing in the maximum tensile strength of graphite-epoxy by 2.9 times to that of fiberglass and by 5.5 times to that of Kevlar-epoxy. Furthermore, the results of bending stress test show increasing of the maximum strength of Kevlar-epoxy by 30% comparing to that of glass fiber and by 75% comparing to that of graphite-epoxy.

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Thermo-Mechanical Properties of Geopolymer/Carbon Fiber/TiO2 Nanoparticles (NPs) Composite

Materials Science Forum ◽

10.4028/www.scientific.net/msf.967.267 ◽

2019 ◽

Vol 967 ◽

pp. 267-273

Author(s):

Subaer ◽

Abdul Haris ◽

Noor Afifah Kharisma ◽

Nur Akifah ◽

Risna Zulwiyati

Keyword(s):

Mechanical Properties ◽

Tensile Strength ◽

Thermal Properties ◽

High Temperature ◽

Carbon Fiber ◽

Carbon Fibers ◽

Experimental Results ◽

Temperature Resistance ◽

Cleaning Agent ◽

High Temperature Resistance

The main objective of this study is to investigate the thermo-mechanical properties of composite made from geopolymer/carbon fiber/TiO2 NPs. The composite was fabricated from geopolymer based on metakaolin added with carbon fibers as reinforcement and TiO2 NPs as self-cleaning agent. The thermal properties of the composite was examined by subjecting the samples to temperature up to 750OC for 4 hours. The mechanical properties of the resulting materials were measured by using flexural and tensile strength measurements. The experimental results showed that the compsite exhibited high temperature resistance and the addition of carbon fiber were increase the flexural as well as the tensile strength of the composite.

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Improvement of the Interfacial Adhesion Between Fiber and Matrix

Mechanics and Mechanical Engineering ◽

10.2478/mme-2018-0069 ◽

2020 ◽

Vol 22 (4) ◽

pp. 885-894 ◽

Cited By ~ 1

Author(s):

Benaoum Abdelhak ◽

Mahmoudi Noureddine ◽

Mahmoudi Hacen

Keyword(s):

Mechanical Properties ◽

Tensile Strength ◽

Carbon Fiber ◽

Surface Treatment ◽

Carbon Fibers ◽

Interfacial Adhesion ◽

Unsaturated Polyester ◽

Fiber Surface ◽

The Matrix ◽

Fiber Surface Treatment

AbstractIn this work, the influence of carbon fiber surface treatment on mechanical properties of unsaturated polyester was investigated. Two approaches have been used in the surface treatment; the first is the desizing of the carbon fiber by the release of the epoxy layer. The second is with the release of epoxy layer and etching the fibers. It was concluded that both methods give good results on adhesion between the matrix and the fibers. It is found that the treatment of carbon fibers is efficient and greatly improves the CFRP handress. The tensile strength of composite materials increases by 30% for etched carbon fibers compared to untreated carbon fibers.SEM images confirm the results obtained.

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Effect of Pyrolytic Carbon Interphase on Mechanical Properties of mini T800-C/SiC Composites

10.21203/rs.3.rs-46865/v1 ◽

2020 ◽

Author(s):

Donglin Zhao ◽

Tong Guo ◽

X.M. Fan ◽

Chao Chen ◽

Yue Ma

Keyword(s):

Mechanical Properties ◽

Tensile Strength ◽

Carbon Fiber ◽

Tensile Property ◽

Weibull Modulus ◽

Pyrolytic Carbon ◽

Matrix Composites ◽

Average Strength ◽

Maximum Value ◽

Sic Composites

Abstract The effect of pyrolytic carbon (PyC) thickness on the tensile property of mini T800-carbon fiber reinforced SiC matrix composites (mini-C/SiC) was studied in this work. PyC interphase was prepared by CVI process, and the PyC thickness was adjusted from 0 to 400 nm. The results showed that the tensile strength of mini-C/SiC first increased and then decreased with the increase of the PyC thickness. When the thickness of PyC was 100 nm, the average strength reached the maximum value of 393±70 MPa. Weibull modulus increased from 2.0 to 8.06 with the increase of PyC thickness, indicating that the increase of PyC thickness is conducive to reducing the dispersion of mechanical properties.

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The effects of fiber ply orientation, laminate layer and PLA content on mechanical properties of carbon fiber reinforced bioplastic composites

Modern Physics Letters B ◽

10.1142/s0217984920400138 ◽

2020 ◽

Vol 34 (07n09) ◽

pp. 2040013

Author(s):

R. Murakami ◽

A. Fajri ◽

W. Solafide

Keyword(s):

Mechanical Properties ◽

Tensile Strength ◽

Fatigue Life ◽

Fatigue Strength ◽

Carbon Fiber ◽

Carbon Fibers ◽

Corn Starch ◽

Laminate Layer ◽

The Difference ◽

Ply Orientation

In this study, two kinds of bioplastic materials, where the first consists of 10% PLA, corn starch of 80% and CaCO3 10%, and the second consists of 45% PLA content, corn starch of 45% and CaCO3 10%, were used. The composites were also reinforced by the carbon fibers, which were prepared with one and two layers of carbon fiber and then ply orientations of [0[Formula: see text]] and [45[Formula: see text]]. The maximum tensile strength was observed for PLA 45% with a [0[Formula: see text]] ply orientation of two layers of carbon fiber. For composite with two layers of carbon fiber, the tensile strength showed higher for the [0[Formula: see text]] ply orientation than for the [45[Formula: see text]] ply orientation. The fatigue strength strongly depends on the orientation of carbon fiber, but in the long fatigue life range, the difference of fatigue strength between the fiber ply orientations reduces.

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Mechanical properties of vapor-grown carbon fibers prepared from benzene in Linz–Donawitz converter gas by floating catalyst method

Journal of Materials Research ◽

10.1557/jmr.1992.3019 ◽

1992 ◽

Vol 7 (11) ◽

pp. 3019-3022 ◽

Cited By ~ 10

Author(s):

Munehiro Ishioka ◽

Toshihiko Okada ◽

Kenji Matsubara

Keyword(s):

Mechanical Properties ◽

Tensile Strength ◽

Young’S Modulus ◽

Carbon Fibers ◽

Young's Modulus ◽

Average Tensile Strength ◽

Converter Gas

Tensile strength and Young's modulus were determined for vapor-grown carbon fibers (VGCF's) prepared from benzene in Linz–Donawitz converter gas (LDG) by the floating catalyst method. The tensile strength decreased with increasing diameter and volume and depended strongly on whether the fiber was straight or crooked. The average tensile strength of straight fibers was 2.05 GPa, while that of crooked fibers was 1.09 GPa. The latter broke at bends in the fiber where they acted as defects. The average Young's modulus of straight fibers was 163 GPa, while that of crooked fibers was a little higher at 197 GPa. VGCF's prepared in LDG appeared to have comparable mechanical properties to those grown in hydrogen.

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Quality of Surface Texture and Mechanical Properties of PLA and PA-Based Material Reinforced with Carbon Fibers Manufactured by FDM and CFF 3D Printing Technologies

Polymers ◽

10.3390/polym13111671 ◽

2021 ◽

Vol 13 (11) ◽

pp. 1671

Author(s):

Mohd Shahneel Saharudin ◽

Jiri Hajnys ◽

Tomasz Kozior ◽

Damian Gogolewski ◽

Paweł Zmarzły

Keyword(s):

Mechanical Properties ◽

Tensile Strength ◽

Surface Layer ◽

3D Printing ◽

Carbon Fibers ◽

Tensile Tests ◽

Mechanical Tests ◽

Uniaxial Tensile ◽

Test Results

The paper presents the results of mechanical tests of models manufactured with two 3D printing technologies, FDM and CFF. Both technologies use PLA or PA-based materials reinforced with carbon fibers. The work includes both uniaxial tensile tests of the tested materials and metrological measurements of surfaces produced with two 3D printing technologies. The test results showed a significant influence of the type of technology on the strength of the models built and on the quality of the technological surface layer. After the analysis of the parameters of the primary profile, roughness and waviness, it can be clearly stated that the quality of the technological surface layer is much better for the models made with the CFF technology compared to the FDM technology. Furthermore, the tensile strength of the models manufactured of carbon fiber-enriched material is much higher for samples made with CFF technology compared to FDM.

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Effect of silver nitrate on some mechanical properties of heat polymerizing acrylic resins

Mustansiria Dental Journal ◽

10.32828/mdj.v14i1.768 ◽

2019 ◽

Vol 14 (1) ◽

pp. 110

Author(s):

Assiss. Prof. Dr. Sabiha Mahdi Mahdi ◽

Dr. Firas Abd K. Abd K.

Keyword(s):

Mechanical Properties ◽

Tensile Strength ◽

Silver Nitrate ◽

Surface Hardness ◽

Mechanical Tests ◽

Hardness Tester ◽

Acrylic Resins ◽

The Difference

Aim: The aimed study was to evaluate the influence of silver nitrate on surfacehardness and tensile strength of acrylic resins.Materials and methods: A total of 60 specimens were made from heat polymerizingresins. Two mechanical tests were utilized (surface hardness and tensile strength)and 4 experimental groups according to the concentration of silver nitrate used.The specimens without the use of silver nitrate were considered as control. Fortensile strength, all specimens were subjected to force till fracture. For surfacehardness, the specimens were tested via a durometer hardness tester. Allspecimens data were analyzed via ANOVA and Tukey tests.Results: The addition of silver nitrate to acrylic resins reduced significantly thetensile strength. Statistically, highly significant differences were found among allgroups (P≤0.001). Also, the difference between control and experimental groupswas highly significant (P≤0.001). For surface hardness, the silver nitrate improvedthe surface hardness of acrylics. Highly significant differences were statisticallyobserved between control and 900 ppm group (P≤0.001); and among all groups(P≤0.001)with exception that no significant differences between control and150ppm; and between 150ppm and 900ppm groups(P>0.05).Conclusion: The addition of silver nitrate to acrylics reduced significantly the tensilestrength and improved slightly the surface hardness.

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Melt- vs. Non-Melt Blending of Complexly Processable Ultra-High Molecular Weight Polyethylene/Cellulose Nanofiber Bionanocomposite

Polymers ◽

10.3390/polym13030404 ◽

2021 ◽

Vol 13 (3) ◽

pp. 404

Author(s):

Nur Sharmila Sharip ◽

Hidayah Ariffin ◽

Tengku Arisyah Tengku Yasim-Anuar ◽

Yoshito Andou ◽

Yuki Shirosaki ◽

...

Keyword(s):

Mechanical Properties ◽

Molecular Weight ◽

Tensile Strength ◽

Yield Strength ◽

Young’S Modulus ◽

High Molecular Weight ◽

Melt Processing ◽

Cellulose Nanofiber ◽

Melt Blending ◽

Ultra High Molecular Weight

The major hurdle in melt-processing of ultra-high molecular weight polyethylene (UHMWPE) nanocomposite lies on the high melt viscosity of the UHMWPE, which may contribute to poor dispersion and distribution of the nanofiller. In this study, UHMWPE/cellulose nanofiber (UHMWPE/CNF) bionanocomposites were prepared by two different blending methods: (i) melt blending at 150 °C in a triple screw kneading extruder, and (ii) non-melt blending by ethanol mixing at room temperature. Results showed that melt-processing of UHMWPE without CNF (MB-UHMWPE/0) exhibited an increment in yield strength and Young’s modulus by 15% and 25%, respectively, compared to the Neat-UHMWPE. Tensile strength was however reduced by almost half. Ethanol mixed sample without CNF (EM-UHMWPE/0) on the other hand showed slight decrement in all mechanical properties tested. At 0.5% CNF inclusion, the mechanical properties of melt-blended bionanocomposites (MB-UHMWPE/0.5) were improved as compared to Neat-UHMWPE. It was also found that the yield strength, elongation at break, Young’s modulus, toughness and crystallinity of MB-UHMWPE/0.5 were higher by 28%, 61%, 47%, 45% and 11%, respectively, as compared to the ethanol mixing sample (EM-UHMWPE/0.5). Despite the reduction in tensile strength of MB-UHMWPE/0.5, the value i.e., 28.4 ± 1.0 MPa surpassed the minimum requirement of standard specification for fabricated UHMWPE in surgical implant application. Overall, melt-blending processing is more suitable for the preparation of UHMWPE/CNF bionanocomposites as exhibited by their characteristics presented herein. A better mechanical interlocking between UHMWPE and CNF at high temperature mixing with kneading was evident through FE-SEM observation, explains the higher mechanical properties of MB-UHMWPE/0.5 as compared to EM-UHMWPE/0.5.

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Absorption and Strength Properties of Short Carbon Fiber Reinforced Mortar Composite

Buildings ◽

10.3390/buildings11070300 ◽

2021 ◽

Vol 11 (7) ◽

pp. 300

Author(s):

Md. Safiuddin ◽

George Abdel-Sayed ◽

Nataliya Hearn

Keyword(s):

Tensile Strength ◽

Carbon Fiber ◽

Water Absorption ◽

Carbon Fibers ◽

Strength Properties ◽

Fiber Content ◽

Test Results ◽

Air Content ◽

Entrapped Air ◽

Short Carbon

This paper presents the water absorption and strength properties of short carbon fiber reinforced mortar (CFRM) composite. Four CFRM composites with 1%, 2%, 3%, and 4% short pitch-based carbon fibers were produced in this study. Normal Portland cement mortar (NCPM) was also prepared for use as the control mortar. The freshly mixed mortar composites were tested for workability, wet density, and entrapped air content. In addition, the hardened mortar composites were examined for compressive strength, splitting tensile strength, flexural strength, and water absorption at the ages of 7 and 28 days. The effects of different carbon fiber contents on the tested properties were observed. Test results showed that the incorporation of carbon fibers decreased the workability and wet density, but increased the entrapped air content in mortar composite. Most interestingly, the compressive strength of CFRM composite increased up to 3% carbon fiber content and then it declined significantly for 4% fiber content, depending on the workability and compaction of the mortar. In contrast, the splitting tensile strength and flexural strength of the CFRM composite increased for all fiber contents due to the greater cracking resistance and improved bond strength of the carbon fibers in the mortar. The presence of short pitch-based carbon fibers significantly strengthened the mortar by bridging the microcracks, resisting the propagation of these minute cracks, and impeding the growth of macrocracks. Furthermore, the water absorption of CFRM composite decreased up to 3% carbon fiber content and then it increased substantially for 4% fiber content, depending on the entrapped air content of the mortar. The overall test results suggest that the mortar with 3% carbon fibers is the optimum CFRM composite based on the tested properties.

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