Log in

Relevant bibliographies by topics / Thick Composites / Journal articles

To see the other types of publications on this topic, follow the link: Thick Composites.

Journal articles on the topic 'Thick Composites'

Author: Grafiati

Published: 4 June 2021

Last updated: 20 February 2023

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Thick Composites.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Hadik, N., A. Outzourhit, A. Elmansouri, A. Abouelaoualim, A. Oueriagli, and E. L. Ameziane. "Dielectric Behavior of Ceramic (BST)/Epoxy Thick Films." Active and Passive Electronic Components 2009 (2009): 1–6. http://dx.doi.org/10.1155/2009/437130.

Full text

Abstract:

Composite materials were made by mixing powders ofBa1−xSrxTiO3(x=0.2and 0.4) ceramics and epoxy resin with various volume fractions (vol%). Dielectric measurements of these composites were performed as a function of filler ratio in the range 100–360°K at 10 KHz. The dielectric constant of the composite increased with increasing volume fraction varies slightly with temperature. The 20 vol% of BST(0.4)-epoxy composite had the highest dielectric constant of 19.4 and dielectric loss tangent of 0.027. Among the dielectric mixing models presented, the model of Lichtenecker shows the best fit to the experimental data for both composites.

APA, Harvard, Vancouver, ISO, and other styles

2

Devikala, S., and P. Kamaraj. "Development of Polymethylmethacrylate Based Composite for Gas Sensing Application." E-Journal of Chemistry 8, s1 (2011): S165—S170. http://dx.doi.org/10.1155/2011/347163.

Full text

Abstract:

Gas detection instruments are increasingly needed for industrial health and safety, environmental monitoring and process control. Conductive polymer composites have various industrial applications. The composite prepared by mixing carbon black with polymethylmethacrylate (PMMA) has very good gas sensing applications. The gas sensors based on carbon nanotube/polymer, ceramic and metal oxide composites such as epoxy, polyimide, PMMA / Barium titanate and tin oxide have also been developed. In the present work, a new composite has been prepared by using PMMA and ammonium dihydrogen phosphate (ADP). The PMMA/Ammonium dihydrogen phosphate (PMADP) composites PMADP 1 and PMADP 2 were characterized by using Powder XRD. The thick films of the composite on glass plates were prepared by using a spin coating unit at 9000 rpm. The application of the thick film as gas sensor has been studied between 0 and 2000 seconds. The results reveal that the thick film of PMADP composite can function as a very good gas sensor.

APA, Harvard, Vancouver, ISO, and other styles

3

Chang, Fu-Kuo, Jose Luis Perez, and Kuo-Yen Chang. "Analysis of Thick Laminated Composites." Journal of Composite Materials 24, no. 8 (August 1990): 801–22. http://dx.doi.org/10.1177/002199839002400802.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Antonucci, Vincenza, Michele Giordano, Sabato Inserra Imparato, and Luigi Nicolais. "Autoclave manufacturing of thick composites." Polymer Composites 23, no. 5 (October 2002): 902–10. http://dx.doi.org/10.1002/pc.10487.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Harris, CE, and DH Morris. "Fracture of thick laminated composites." Experimental Mechanics 26, no. 1 (March 1986): 34–41. http://dx.doi.org/10.1007/bf02319953.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Hosur, M. V., U. K. Vaidya, A. Abraham, N. Jadhav, and S. Jeelani. "Static and High Strain Rate Compression Response of Thick Section Twill Weave S-2 Glass/Vinyl Ester Composites Manufactured by Affordable Liquid Molding Processes." Journal of Engineering Materials and Technology 121, no. 4 (October 1, 1999): 468–75. http://dx.doi.org/10.1115/1.2812403.

Full text

Abstract:

Fiber reinforced composites, due to their higher specific strength and specific stiffness, are replacing many metallic structures. Of these, thick composite laminates are of high interest in various, millitary, transportation and marine applications for their use in ballistic and shock protection. One such application is in Composite Armored Vehicle (CAV) integral armor comprising of thick section composite that serves as the primary load-bearing component. The current solution of the structural backing laminate utilizes an S2-glass/epoxy system processed using automated fiber placement method. While proven structurally suitable, this method is time consuming as well as expensive. This paper presents several alternative cost-effective manufacturing solutions for fabricating composite laminates of 20 mm (0.8 in.) nominal thickness (made of 45 layer, 2 × 2 twill weave S2-glass with 933 sizing/vinyl ester C-50 resin), consisted with them CAV application in focus. They include Vacuum Assisted Resin Transfer Molding (VARTM) and Vacuum Assisted Resin Infusion Modeling (VARIM) and their variations. The effectiveness of different affordable processing approaches adopted in fabricating the structural laminate is compared in terms of static and dynamic compression response of the laminations. Static studies have been conducted on thick composites using specimen based on Army Material Technology Laboratory’s (AMTL) recommendation for thick section composites, while dynamic response is studied on cubic specimen samples using a Split Hopkinson Pressure Bar (SHPB).

APA, Harvard, Vancouver, ISO, and other styles

7

Huang, Runzhou, Xian Zhang, Zhilin Chen, Minli Wan, and Qinglin Wu. "Thermal Stability and Flame Resistance of the Coextruded Wood-Plastic Composites Containing Talc-Filled Plastic Shells." International Journal of Polymer Science 2020 (July 1, 2020): 1–9. http://dx.doi.org/10.1155/2020/1435249.

Full text

Abstract:

Talc is a popular filler for the fabrication of plastic composites. The presence of talc helps improve mechanical, thermal, and flame resistance properties of the composite. In this work, we report the influence of a talc-filled plastic shell layer on thermal stability and fire flammability of the core-shell structured wood high-density polyethylene (HDPE) composites manufactured through coextrusion. The result showed that morphological analysis of the char layer after combustion confirmed the formation of a continuous surface char layer with talc addition in the composites, helping block fire penetration and enhance overall fire resistance of the composites. The shell thickness averaged at 1.0±0.2 mm, which represents a fair thick shell over a 10 mm thick WPC core layer. The surface of regular wood-filled HDPE showed large cracks, allowing more rapid fire penetration and reducing its fire resistance. At 800°C, average residual weight for all composite was 21.5±13.8%, most of which was attributed to the inorganic nonvolatile talc components. With the increase of talc level, THR values of coextruded WPC decreased from 302.47 MJ/m2 (5 wt% of talc) to 262.96 kW/m2 (50 wt% of talc). When talc content in the shell layer was less than 25 wt%, the flame resistance properties were slightly enhanced compared with the composites containing unmodified HDPE shells. When talc content in the shell exceeded 25 wt%, the composite’s total heat release and its rate substantially decreased.

APA, Harvard, Vancouver, ISO, and other styles

8

Alkan, Ümit, Yaşar Karabul, Ayşe Evrim Bulgurcuoğlu, Mehmet Kılıç, Zeynep Güven Özdemir, and Orhan İçelli. "Polypropylene/basalt thick film composites: structural, mechanical and dielectric properties." e-Polymers 17, no. 5 (August 28, 2017): 417–25. http://dx.doi.org/10.1515/epoly-2017-0035.

Full text

Abstract:

AbstractIn this work, polypropylene/volcanic basalt rock (PP/VBR) thick film composites with different VBR powder mass ratio varying from 0.5 wt.% to 20.0 wt.% were prepared by using the hot press technique. The effects of VBR powder doping on mechanical, structural and dielectric properties of PP were investigated by stress-strain measurements, Fourier transform infrared analysis, thermal gravimetric analysis, scanning electron microscopy and dielectric spectroscopy methods. The highest tensile strength, percentage strain and energy at break were achieved for 0.5 wt.% VBR powder doped PP composite. According to the stress-percentage strain curves of the samples, it was observed that 0.5 wt.% VBR powder doping increases the mechanical performance of PP polymer. In addition, regardless of the doping concentration level of basalt powder, the real part of complex dielectric function (ε′) of all PP composites display approximately frequency independent behavior between 100 Hz and 1 MHz. On the other hand, 0.5 wt.% VBR powder doped PP composite has also the lowest dielectric constant at the vicinity of 2.7 between 100 Hz and 1 MHz. The composite also has considerably low dielectric loss which has a crucial importance for technological applications. For these reasons, PP/0.5 wt.% VBR composite with the highest tensile strength can be considered as a suitable candidate for microelectronic devices. Furthermore, the alternative current conductivity mechanism was determined as nearly constant loss due to approximately constant dielectric loss between 10 Hz and 1 MHz.

APA, Harvard, Vancouver, ISO, and other styles

9

Hojjati, M., and S. V. Hoa. "Curing simulation of thick thermosetting composites." Composites Manufacturing 5, no. 3 (September 1994): 159–69. http://dx.doi.org/10.1016/0956-7143(94)90025-6.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Guo, Zhan-Sheng, Shanyi Du, and Boming Zhang. "Temperature distribution of thick thermoset composites." Modelling and Simulation in Materials Science and Engineering 12, no. 3 (February 25, 2004): 443–52. http://dx.doi.org/10.1088/0965-0393/12/3/006.

Full text

APA, Harvard, Vancouver, ISO, and other styles

11

Cheng, Wing L., Scott Langlie, and Shigeru Itoh. "High velocity impact of thick composites." International Journal of Impact Engineering 29, no. 1-10 (December 2003): 167–84. http://dx.doi.org/10.1016/j.ijimpeng.2003.09.015.

Full text

APA, Harvard, Vancouver, ISO, and other styles

12

Park, Shin Young, Simyub Yook, Sooim Goo, Wanhee Im, and Hye Jung Youn. "Preparation of Transparent and Thick CNF/Epoxy Composites by Controlling the Properties of Cellulose Nanofibrils." Nanomaterials 10, no. 4 (March 28, 2020): 625. http://dx.doi.org/10.3390/nano10040625.

Full text

Abstract:

Cellulose nanofibrils (CNFs) have been used as reinforcing elements in optically transparent composites by combination with polymer matrices. In this study, strong, optically transparent, and thick CNF/epoxy composites were prepared by immersing two or four layers of CNF sheets in epoxy resin. The morphology of the CNF, the preparation conditions of the CNF sheet, and the grammage and layer numbers of the CNF sheets were controlled. The solvent-exchanged CNF sheets resulted in the production of a composite with high transparency and low haze. The CNF with smaller width and less aggregated fibrils, which are achieved by carboxymethylation, and a high number of grinding passes are beneficial in the production of optically transparent CNF/epoxy composites. Both the grammage and number of stacked layers of sheets in a composite affected the optical and mechanical properties of the composite. A composite with a thickness of 450–800 μm was prepared by stacking two or four layers of CNF sheets in epoxy resin. As the number of stacked sheets increased, light transmittance was reduced and the haze increased. The CNF/epoxy composites with two layers of low grammage (20 g/m2) sheets exhibited high light transmittance (>90%) and low haze (<5%). In addition, the composites with the low grammage sheet had higher tensile strength and elastic modulus compared with neat epoxy and those with high grammage sheets.

APA, Harvard, Vancouver, ISO, and other styles

13

Mataram, Agung, and Narwi Panggar Besi. "Effect of Thickness Layer of Kenaf Fibre Reinfoeced Fibre Glass, Against Impact of Hybrid Composite Sandwich with Core Sengon." Journal of Mechanical Science and Engineering 6, no. 1 (July 7, 2020): 013–17. http://dx.doi.org/10.36706/jmse.v6i1.30.

Full text

Abstract:

The purpose of this research is to know the impact strength of composite structures of sengon laut sawdust. Experimental results show that the impact toughness of sandwich composite will increase as the thickness of composite sandwich skin increases. The impact failure is due mostly to the shear failure of the core. Brittle specimen failure occurs on the sandwich composites structured with skin and core manufactured with the same thickness of 5 mm. This brittle sandwich composite has a flat cross section on both sides of the fault. The shear failure of the cores occurs in samples with 2 mm thick, 3 mm, 4 mm thick, and 10 mm thick core. In some samples, the shear failure of the cores is accompanied by cracks on the core so that the sandwich composite is broken in several parts. The highest value of absorption energy and the highest impact strength is found on thick composite sandwich variation of 10 mm thick with 4 mm thickness of 2,7860 J and 0,01032 J/mm2.

APA, Harvard, Vancouver, ISO, and other styles

14

Zhang, Guowei, Ling Luo, Ting Lin, Boming Zhang, He Wang, Yuao Qu, and Bangke Meng. "Multi-Objective Optimisation of Curing Cycle of Thick Aramid Fibre/Epoxy Composite Laminates." Polymers 13, no. 23 (November 23, 2021): 4070. http://dx.doi.org/10.3390/polym13234070.

Full text

Abstract:

Aramid fibre-reinforced epoxy composites (AF/EP) are promising materials in the aerospace, transportation, and civil fields owing to their high strength, high modulus, and light weight. Thick composite laminates are gradually being applied to large composite structures such as wind turbine blades. During curing, temperature overheating is a common problem in thick composites, which leads to matrix degradation, thermal residual stresses, and uneven curing. This paper proposes a signal-to-noise ratio (SNR) method to optimise the curing cycle of thick AF/EP laminates and reduce the overheating temperature. During curing, the temperature and strain evolution in a thick AF/EP laminate were monitored using fibre Bragg grating sensors. The effects of the curing factors on the overheating temperature of the thick AF/EP laminate were evaluated using the Taguchi method and predicted via the SNR method and analysis of variance. The results indicate that the dwelling temperature is the main factor affecting the overheating temperature. The optimal curing cycle involves an overheating temperature of 192.72 °C, which constitutes an error of 2.58% compared to the SNR method predictions. Additionally, in comparison to the initial curing cycle, the overshoot temperature in the optimised curing cycle was reduced by 58.48 °C, representing a reduction ratio of 23.28%.

APA, Harvard, Vancouver, ISO, and other styles

15

Nunes, Stephanie Gonçalves, Wanderley Ferreira de Amorim, Andrea Manes, and Sandro Campos Amico. "The effect of thickness on vacuum infusion processing of aramid/epoxy composites for ballistic application." Journal of Composite Materials 53, no. 3 (July 2, 2018): 383–91. http://dx.doi.org/10.1177/0021998318785702.

Full text

Abstract:

This work addresses the effect of thickness on the vacuum infusion processing of thick aramid/epoxy composites for impact applications. Composites were produced with 5, 8, 13, 18, and 23 plain-weave fiber layers and characterized using ultrasonic C-scan inspections, optical microscopy, density and constituent content analyses, as well as mechanical tests (flexural and short beam). All composite plates presented good reinforcement-matrix homogeneity, with an overall fiber content of about 60%. A reasonable void content was identified by optical microscopy and density analysis, and they were homogeneously distributed. The composites presented high short beam strength values compared with typical aramid/epoxy laminates for impact applications, and ballistic characteristics comparable to those of composites manufactured by compression or autoclave molding. In summary, optimized vacuum infusion processing was shown to be a suitable alternative to produce thick aramid/epoxy plate composites (up to 12 mm), substituting more costly processing routes.

APA, Harvard, Vancouver, ISO, and other styles

16

Kambale, Rahul C., Dae-Yong Jeong, and Jungho Ryu. "Current Status of Magnetoelectric Composite Thin/Thick Films." Advances in Condensed Matter Physics 2012 (2012): 1–15. http://dx.doi.org/10.1155/2012/824643.

Full text

Abstract:

Here we review the current status of magnetoelectric (ME) multiferroics and ME composite thin/thick films. The magnitude of ME coupling in the composite systems is dependent upon the elastic coupling occurring at the interface of piezoelectric and magnetostrictive phases. The multiferroic ME films in comparison with bulk ME composites have some unique advantages and show higher magnitude of ME response. In ME composite films, thickness of the films is one of the important factors to have enough signal. However, most of all reported ME nanocomposite structured films in literature are limited in overall thickness which might be related to interface strain resulting from difference in thermal expansion mismatch between individual phases and the substrate. We introduced noble ME composite film fabrication technique, aerosol deposition (AD) to overcome these problems. The success in AD fabrication and characterization of ME composite films with various microstructure such as 3-2, 2-2 connectivity are discussed.

APA, Harvard, Vancouver, ISO, and other styles

17

Ahmad Sobri, Sharizal, Robert Heinemann, and David Whitehead. "Development of Laser Drilling Strategy for Thick Carbon Fibre Reinforced Polymer Composites (CFRP)." Polymers 12, no. 11 (November 12, 2020): 2674. http://dx.doi.org/10.3390/polym12112674.

Full text

Abstract:

Composites from carbon fibre reinforced polymers (CFRPs) play a significant role in modern manufacturing. They are typically used in aerospace and other industries that require high strength-to-weight ratios. Composite machining, however, remains a challenging job and sometimes is hampered by poor efficiency. Despite considerable research being conducted over the past few years on the machining of composite materials, the material nevertheless suffers from delamination, fibre loss, and imperfect finishing of the fuselage. Laser technology is becoming increasingly popular as an alternative approach to cutting and drilling composites. Experiments have been conducted with a CFRP thickness of 25.4 mm using fibre laser to test the effect of the machining parameters on the primary performance measurements. In this study, different machining criteria are used to assess the fibre laser ability of thick CFRP composites for drilling operation. The experimental findings revealed that a fibre laser is capable of penetrating a thick CFRP to a depth of 22 mm by using a novel drilling procedure.

APA, Harvard, Vancouver, ISO, and other styles

18

Kang, Bo, Ho Kim, Phil Oh, Jung Lee, Hyung Lee, and Seong Hong. "Characteristics of ZrC Barrier Coating on SiC-Coated Carbon/Carbon Composite Developed by Thermal Spray Process." Materials 12, no. 5 (March 5, 2019): 747. http://dx.doi.org/10.3390/ma12050747.

Full text

Abstract:

A thick ZrC layer was successfully coated on top of a SiC buffer layer on carbon/carbon (C/C) composites by vacuum plasma spray (VPS) technology to improve the ablation resistance of the C/C composites. An optimal ZrC coating condition was determined by controlling the discharge current. The ZrC layers were more than 70 µm thick and were rapidly coated under all spraying conditions. The ablation resistance and the oxidation resistance of the coated layer were evaluated in supersonic flames at a temperature exceeding 2000 °C. The mass and linear ablation rate of the ZrC-coated C/C composites increased by 2.7% and 0.4%, respectively. During flame exposure, no recession was observed in the C/C composite. It was demonstrated that the ZrC coating layer can fully protect the C/C composites from oxidation and ablation.

APA, Harvard, Vancouver, ISO, and other styles

19

Colomban, Philippe. "Sol-gel control of the micro/nanostructure of functional ceramic-ceramic and metal-ceramic composites." Journal of Materials Research 13, no. 4 (April 1998): 803–11. http://dx.doi.org/10.1557/jmr.1998.0102.

Full text

Abstract:

The problems encountered to tailor simultaneously various specific chemical or physical properties are discussed. Selected polymeric precursors used in association with fine powders allow the control of the nano/microstructure of composites and hence the preparation of functional (FGM) and hierarchical reinforced (HRC) composites, making it possible to combine several kinds of fibers, interphases, and matrices in the same composite (hot microwave absorbent), to control the fiber/matrix interface (long life times composites), to achieve net-shape sintering of 3D composite matrices, and to prepare thick films of metal-ceramic composites with tailored microwave absorption (radar stealthiness).

APA, Harvard, Vancouver, ISO, and other styles

20

Sakuma, Wataru, Shuji Fujisawa, Lars A. Berglund, and Tsuguyuki Saito. "Nanocellulose Xerogel as Template for Transparent, Thick, Flame-Retardant Polymer Nanocomposites." Nanomaterials 11, no. 11 (November 12, 2021): 3032. http://dx.doi.org/10.3390/nano11113032.

Full text

Abstract:

Cellulose nanofibers (CNFs) have excellent properties, such as high strength, high specific surface areas (SSA), and low coefficients of thermal expansion (CTE), making them a promising candidate for bio-based reinforcing fillers of polymers. A challenge in the field of CNF-reinforced composite research is to produce strong and transparent CNF/polymer composites that are sufficiently thick for use as load-bearing structural materials. In this study, we successfully prepared millimeter-thick, transparent CNF/polymer composites using CNF xerogels, with high porosity (~70%) and high SSA (~350 m2 g−1), as a template for monomer impregnation. A methacrylate was used as the monomer and was cured by UV irradiation after impregnation into the CNF xerogels. The CNF xerogels effectively reinforced the methacrylate polymer matrix, resulting in an improvement in the flexural modulus (up to 546%) and a reduction in the CTE value (up to 78%) while maintaining the optical transparency of the matrix polymer. Interestingly, the composites exhibited flame retardancy at high CNF loading. These unique features highlight the applicability of CNF xerogels as a reinforcing template for producing multifunctional and load-bearing polymer composites.

APA, Harvard, Vancouver, ISO, and other styles

21

Hwang, B. S., S. B. Park, B. H. Kim, I. S. Park, Heung Sub Song, and Jong K. Lee. "Fracture and Strength of Notched Thick Composites." Key Engineering Materials 183-187 (April 2000): 791–96. http://dx.doi.org/10.4028/www.scientific.net/kem.183-187.791.

Full text

APA, Harvard, Vancouver, ISO, and other styles

22

Michaud, D. J., A. N. Beris, and P. S. Dhurjati. "Curing Behavior of Thick-Sectioned RTM Composites." Journal of Composite Materials 32, no. 14 (July 1998): 1273–96. http://dx.doi.org/10.1177/002199839803201402.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

Zimmermann, K., D. Zenkert, and M. Siemetzki. "Testing and analysis of ultra thick composites." Composites Part B: Engineering 41, no. 4 (June 2010): 326–36. http://dx.doi.org/10.1016/j.compositesb.2009.12.004.

Full text

APA, Harvard, Vancouver, ISO, and other styles

24

Shin, Daniel D., and H. Thomas Hahn. "Compaction of thick composites: Simulation and experiment." Polymer Composites 25, no. 1 (2004): 49–59. http://dx.doi.org/10.1002/pc.20004.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Lin, Yung-Kun, Hsien-Kuang Liu, Wen-Shyong Kuo, and Yu-Der Chen. "Fracture evolution in thick composites under compression." Polymer Composites 28, no. 4 (2007): 425–36. http://dx.doi.org/10.1002/pc.20352.

Full text

APA, Harvard, Vancouver, ISO, and other styles

26

Jiang, F., Z. B. Zhang, L. He, J. Sun, H. Zhang, and Z. F. Zhang. "The effect of primary crystallizing phases on mechanical properties of Cu46Zr47Al7 bulk metallic glass composites." Journal of Materials Research 21, no. 10 (October 2006): 2638–45. http://dx.doi.org/10.1557/jmr.2006.0315.

Full text

Abstract:

Cu46Zr47Al7 bulk metallic glass (BMG) and its composites in plate with different thicknesses up to 6 mm were prepared by copper mold casting. Primary crystallizing phases with different microstructures and volume fractions could be obtained under different cooling rates, forming some composites with different mechanical properties. Under compression tests, the 2-mm-thick monolithic BMG has a yield strength of 1894 MPa and a high fracture strength of up to 2250 MPa at plastic strain up to 6%, exhibiting apparent “work-hardening” behavior. The 4-mm-thick Cu46Zr47Al7 BMG composite containing martensite phase yields at 1733 MPa and finally fails at 1964 MPa with a plastic strain of 3.7%.

APA, Harvard, Vancouver, ISO, and other styles

27

Fronza, BM, APA Ayres, RR Pacheco, FA Rueggeberg, CTS Dias, and M. Giannini. "Characterization of Inorganic Filler Content, Mechanical Properties, and Light Transmission of Bulk-fill Resin Composites." Operative Dentistry 42, no. 4 (July 1, 2017): 445–55. http://dx.doi.org/10.2341/16-024-l.

Full text

Abstract:

SUMMARY Objectives: The aims of this study were to characterize inorganic content (IC), light transmission (LT), biaxial flexural strength (BFS), and flexural modulus (FM) of one conventional (layered) and four bulk-fill composites at different depths. Methods: Bulk-fill composites tested were Surefil SDR flow (SDR), Filtek Bulk Fill (FBF), Tetric EvoCeram Bulk Fill (TEC), and EverX Posterior (EXP). Herculite Classic (HER) was used as a control. Energy dispersive x-ray analysis and scanning electron microscopy were used to characterize filler particle composition and morphology. The LT through different composite thicknesses (1, 2, 3, and 4 mm) was measured using a laboratory-grade spectral radiometer system (n=5). For the BFS and FM tests, sets of eight stacked composite discs (0.5-mm thick) were prepared simulating bulk filling of a 4-mm-thick increment (n=8). Results: SDR demonstrated larger, irregular particles than those observed in TEC or HER. Filler particles in FBF were spherical, while those in EXP were composed of fiberglass strands. The LT decreased with increased composite thickness for all materials. Bulk-fill composites allowed higher LT than the HER. Furthermore, HER proved to be the unique material, having lower BFS values at deeper regions. SDR, FBF, and TEC bulk-fill composites presented reduced FM with increasing composite depth. Conclusions: The bulk-fill composites investigated exhibited higher LT, independent of different filler content and characteristics. Although an increase in composite thickness reduced LT, the BFS of bulk-fill composites at deeper layers was not compromised.

APA, Harvard, Vancouver, ISO, and other styles

28

MIZUUCHI, KIYOSHI, MASAMI SUGIOKA, MASAO ITAMI, KANRYU INOUE, JUN-HEE LEE, MASAKAZU KAWAHARA, and YUKIO MAKINO. "HIGH SPEED PROCESSING OF NI-ALUMINIDES-REINFORCED NI-MATRIX COMPOSITES BY PULSED-CURRENT HOT PRESSING (PCHP)." International Journal of Modern Physics B 22, no. 09n11 (April 30, 2008): 1672–79. http://dx.doi.org/10.1142/s0217979208047249.

Full text

Abstract:

Nickel-aluminides-reinforced nickel-matrix composites were fabricated from 0.05mm-thick nickel foils and 0.012mm-thick aluminum foils, in a process using a pulsed-current hot pressing (PCHP) equipment, and the effect of reaction temperature on mechanical properties of the composites was investigated. The composites were of laminated structure and composed of Ni and reacted layers containing Ni -aluminides. The chemical composition of the reacted layers was dependent on reaction temperature in the temperature range employed. Tensile testing at room temperature revealed that the reaction temperature evidently influences mechanical properties, including tensile strength, elongation and fracture mode, of the composites. The tensile strength and elongation of composites fabricated at 1373K were 500MPa and 3.8%, respectively. Microstructure observations of fractured specimens revealed that Ni layers of the composite played a significant role in prohibiting the growth of numerous cracks emanating from Ni -aluminides. In the case of composites fabricated at 1373K, in addition, crack propagation between Ni -rich Al -solid-solution layers and cellular Ni 3 Al in the Ni -aluminides were prevented by mutual interaction.

APA, Harvard, Vancouver, ISO, and other styles

29

Gaval, Vivek Ramdas. "Mechanical Properties Evaluation for Cotton/Glass/Epoxy Hybrid Composite." ASM Science Journal 17 (October 17, 2022): 1–9. http://dx.doi.org/10.32802/asmscj.2022.1031.

Full text

Abstract:

Natural fibre reinforced composites of any group are essential to satisfy the current demand and to keep the environment-friendly approach. In the present work, an attempt has been made to replace glass fibres partially by cotton fabric so as to reduce weight and cost of the resultant composite Here, cotton fabric 0.4 mm thick (125 GSM) and fibreglass woven roving 0.15 mm thick (180 GSM) were used with epoxy resin in different weight fractions to prepare hybrid composites. The composites were prepared using hand lay-up method. The Tensile strength, flexural strength, impact strength and hardness tests were performed as per ASTM standards and results are reported for each sample. The specimens were characterised using scanning electron microscope (SEM). The mechanical properties of composites with 80% glass fibre and 20% cotton fabric are found to be closer to glass/epoxy composites. Hence it is concluded that 20% glass fibres can be replaced by cotton fabric in the existing glass/epoxy products in which mechanical properties are important.

APA, Harvard, Vancouver, ISO, and other styles

30

Sujuan, Ye, Yu Quan, Li Kunquan, Tan Feng, Fan Qing, Tan Guibin, and Huang Xing. "The Tribological and Sealing Properties of PFA Composites." International Journal of Polymer Science 2018 (2018): 1–6. http://dx.doi.org/10.1155/2018/2302407.

Full text

Abstract:

The polytetrafluoroethylene (PTFE) and perfluoroalkoxyperfluoropropyl vinyl ether (PFA) composites were prepared using carbon fiber (CF) and glass fiber (GF) as fillers. The effects of these fillers on the tribological and sealing properties were investigated. The tribological and sealing properties of the composites were evaluated by a wear tester and a seal test rig. Results showed that the incorporation of CF and GF both improved the wear resistance with composites, approaching wear rates as low as 10−6 mm3/N·m and lowered the seal’s leakage of the PTFE/PFA composites. As described here, CF was more effective than GF in improving the wear rate. Notably, the wear rate of the PFA/CF composite is much less than that of the PTFE composites as the transfer film on the couple ring is much more unique, thick, smooth, and compact. The leakage of carbon fiber-filled PFA composite seal was lowered to 66% less than the traditional PTFE composite seals, which indicates better sealing properties.

APA, Harvard, Vancouver, ISO, and other styles

31

Zoughi, R., S. Ganchev, and G. W. Carriveau. "Overview of Microwave NDE Applied to Thick Composites." Materials Science Forum 210-213 (May 1996): 69–76. http://dx.doi.org/10.4028/www.scientific.net/msf.210-213.69.

Full text

APA, Harvard, Vancouver, ISO, and other styles

32

Naik, N. K., and A. V. Doshi. "Ballistic Impact Behavior of Thick Composites: Analytical Formulation." AIAA Journal 43, no. 7 (July 2005): 1525–36. http://dx.doi.org/10.2514/1.11993.

Full text

APA, Harvard, Vancouver, ISO, and other styles

33

Dietze, M., J. Krause, C. H. Solterbeck, and M. Es-Souni. "Thick film polymer-ceramic composites for pyroelectric applications." Journal of Applied Physics 101, no. 5 (March 2007): 054113. http://dx.doi.org/10.1063/1.2653978.

Full text

APA, Harvard, Vancouver, ISO, and other styles

34

Fahr,, A., Β. Roge,, Μ. Brothers,, and D. G. Zimcik,. "Inspection of Thick Composites for Near Surface Flaws." Science and Engineering of Composite Materials 11, no. 2-3 (September 2004): 177–84. http://dx.doi.org/10.1515/secm.2004.11.2-3.177.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

TODOROKI, Akira. "Electric Current Analysis for Thick Laminated CFRP Composites." TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES 55, no. 4 (2012): 237–43. http://dx.doi.org/10.2322/tjsass.55.237.

Full text

APA, Harvard, Vancouver, ISO, and other styles

36

Bogetti, Travis A., and John W. Gillespie. "Two-Dimensional Cure Simulation of Thick Thermosetting Composites." Journal of Composite Materials 25, no. 3 (March 1991): 239–73. http://dx.doi.org/10.1177/002199839102500302.

Full text

APA, Harvard, Vancouver, ISO, and other styles

37

Hsiao, H. M., I. M. Daniel, and S. C. Wooh. "A New Compression Test Method for Thick Composites." Journal of Composite Materials 29, no. 13 (September 1995): 1789–806. http://dx.doi.org/10.1177/002199839502901307.

Full text

APA, Harvard, Vancouver, ISO, and other styles

38

Bhalerao, Manoj S., and Tess J. Moon. "Micromechanics of local viscoelastic buckling in thick composites." Composites Part B: Engineering 27, no. 6 (January 1996): 561–68. http://dx.doi.org/10.1016/s1359-8368(96)00013-3.

Full text

APA, Harvard, Vancouver, ISO, and other styles

39

Pecknold, D. A., and S. Rahman. "Micromechanics-based structural analysis of thick laminated composites." Computers & Structures 51, no. 2 (April 1994): 163–79. http://dx.doi.org/10.1016/0045-7949(94)90047-7.

Full text

APA, Harvard, Vancouver, ISO, and other styles

40

Britton, David T., and M. Härting. "Printed nanoparticulate composites for silicon thick-film electronics." Pure and Applied Chemistry 78, no. 9 (January 1, 2006): 1723–39. http://dx.doi.org/10.1351/pac200678091723.

Full text

Abstract:

The production of active semiconductor thick-film components typically involves the deposition of precursor materials and subsequent thermal processing to produce a massive semiconductor layer. In this paper, we present electronic materials, based on nanoparticulate silicon, to produce the active semiconducting layer, which can simply be printed onto low-temperature substrates such as paper. Particular emphasis will be given to the structure, morphology, and composition of the nanoparticles, which are produced by either gas-phase decomposition of silane or mechanical attrition of bulk silicon. Of further importance are the electrical characteristics of the composite materials, in which the active semiconductor is formed from an interconnecting backbone of silicon particles. These will be discussed for example structures, including junction field effect transistors (FETs), insulated-gate FETs, and photodiodes.

APA, Harvard, Vancouver, ISO, and other styles

41

Aleksendrić, Dragan, Costanzo Bellini, Pierpaolo Carlone, Velimir Ćirović, Felice Rubino, and Luca Sorrentino. "Neural-fuzzy optimization of thick composites curing process." Materials and Manufacturing Processes 34, no. 3 (September 5, 2018): 262–73. http://dx.doi.org/10.1080/10426914.2018.1512116.

Full text

APA, Harvard, Vancouver, ISO, and other styles

42

Daniel, Isaac M., Hao-Ming Hsiao, and Shi-Chang Wooh. "Failure mechanisms in thick composites under compressive loading." Composites Part B: Engineering 27, no. 6 (January 1996): 543–52. http://dx.doi.org/10.1016/1359-8368(95)00010-0.

Full text

APA, Harvard, Vancouver, ISO, and other styles

43

Martinez, Gregory M. "Fast cures for thick laminated organic matrix composites." Chemical Engineering Science 46, no. 2 (1991): 439–50. http://dx.doi.org/10.1016/0009-2509(91)80005-j.

Full text

APA, Harvard, Vancouver, ISO, and other styles

44

Salekeen, Sirajus, and Douglas L. Jones. "Fatigue response of thick section fiberglass/epoxy composites." Composite Structures 79, no. 1 (June 2007): 119–24. http://dx.doi.org/10.1016/j.compstruct.2005.11.040.

Full text

APA, Harvard, Vancouver, ISO, and other styles

45

Naik, N. K., and A. V. Doshi. "Ballistic impact behaviour of thick composites: Parametric studies." Composite Structures 82, no. 3 (February 2008): 447–64. http://dx.doi.org/10.1016/j.compstruct.2007.01.025.

Full text

APA, Harvard, Vancouver, ISO, and other styles

46

Abetew, AD, TC Truong, SC Hong, JR Lee, and JB Ihn. "Parametric optimization of pulse-echo laser ultrasonic system for inspection of thick polymer matrix composites." Structural Health Monitoring 19, no. 2 (January 28, 2020): 443–53. http://dx.doi.org/10.1177/1475921719852891.

Full text

Abstract:

One of the main challenges of using laser ultrasonic techniques for non-destructive testing applications is the typically low signal-to-noise ratio of the laser ultrasonic signals. In the case of thick composite structures, this is even more problematic since composite materials have very strong sound attenuation. This article investigates the effects of laser beam size and profile to the amplitude of pulse-echo laser ultrasonic signals with the constraint that the peak energy density (fluence) must be kept constant under the thermal damage threshold of material like polymer matrix composites. Such constraint is very important for the non-destructive feature of non-destructive testing, yet in a number of the existing parameter studies of laser ultrasonics, it was not fully investigated. In this article, a series of A-scan and C-scan experiments on thick composite specimens shows that the amplitude of the direct waves and the reflected waves increases with the increase in laser beam size with constant peak energy density. This amplitude enhancement significantly improves the propagation depth, thereby optimizing the system for inspection of thick composite structures. The validity of experimental results is verified theoretically by solving the thermoelastic model of epicenter displacement using Laplace–Hankel transformation.

APA, Harvard, Vancouver, ISO, and other styles

47

Wu, Chuan-Gui, Guang-Qiang Cai, Wen-Bo Luo, Qiang-Xiang Peng, Xiang-Yu Sun, and Wan-Li Zhang. "Enhanced pyroelectric properties of PZT/PVDF-TrFE composites using calcined PZT ceramic powders." Journal of Advanced Dielectrics 03, no. 01 (January 2013): 1350004. http://dx.doi.org/10.1142/s2010135x13500045.

Full text

Abstract:

The effects of calcined lead–zirconate–titanate (PZT) powders on the electric properties of PZT/polyvinylidene-trifluorethylene copolymer (PVDF-TrFE) composites thick films were studied in this paper. Firstly, the PZT powders synthesized by hydrothermal method were calcined at different temperatures ranging from 300°C to 900°C, and then the PZT/PVDF-TrFE composites films were produced by casting PZT/PVDF-TrFE suspension onto the indium-tin-oxide (ITO)-coated glass substrates. Electric properties, including dielectric and pyroelectric performances of thick films consisting of PZT powders calcined at different temperatures were tested. The highest pyroelectric coefficient obtained in the sample using 700°C calcined PZT powders was 96 μCm-2K-1, which was 20% higher than the composites made of uncalcined powders. Additionally, the highest detectivity figure-of-merit (FOM) (F D ) of the composite was 1.36 × 10-5Pa-1/2, which increased about 13.5% compared to the one using uncalcined powders.

APA, Harvard, Vancouver, ISO, and other styles

48

Braski, D. N., and K. B. Alexander. "Auger electron spectroscopy analysis of SiC-whisker surfaces and SiC-whisker/alumina interfaces." Journal of Materials Research 10, no. 4 (April 1995): 1016–23. http://dx.doi.org/10.1557/jmr.1995.1016.

Full text

Abstract:

Auger Electron Spectroscopy (AES) has been used to examine as-received and oxidized silicon carbide whiskers and their respective whisker/matrix interfaces after fabrication into SiC-whisker-reinforced alumina composites. As-received whisker surfaces exhibited a 2–3 nm-thick near-surface region that was C-rich. Oxygen was detected at the outer surface, but diminished to near zero within 25 nm of the surface. Oxidized whiskers had 60 nm-thick SiO2 surface layers, which was in agreement with the transmission electron microscopy observations. The whisker/matrix interfaces in both composites consisted of thin (<0.5 nm) layers of a C-Si-O noncrystalline material. The thick SiO2 layers on the oxidized whiskers were ejected from the interfaces during hot-pressing. It was concluded that (i) the higher toughness of the composite fabricated with as-received SiC whiskers may be related to the higher C and lower O in its SiCw/Al2O3 interfaces, and (ii) interface composition cannot be reliably predicted using the surface composition of free whiskers prior to fabrication.

APA, Harvard, Vancouver, ISO, and other styles

49

Ibrahim, Matthew E., Andrew W. Phillips, Robert J. Ditchburn, and Chun H. Wang. "Nondestructive Evaluation of Mechanically Loaded Advanced Marine Composite Structures." Advanced Materials Research 891-892 (March 2014): 594–99. http://dx.doi.org/10.4028/www.scientific.net/amr.891-892.594.

Full text

Abstract:

Marine composite structures subject to dynamic loading typically incorporate more than one material type, and consist of laminate sections up to hundreds of millimetres in thickness. These solid hybrid laminates exhibit different behaviour in static and fatigue loading from thin aerospace composite laminates and sandwich structures. There is therefore a need to better understand the likely damage and degradation mechanisms that will occur in these thick structures and to concurrently develop nondestructive evaluation (NDE) technology to meet the consequent inspection problems. In this paper we present details of an ongoing fatigue program on marine composite blades. The challenges for ultrasonic NDE of thick composites, and emerging inspection methods using state-of-the-art inspection systems and analysis tools will be discussed.

APA, Harvard, Vancouver, ISO, and other styles

50

Oh, Je Hoon. "Prediction of Temperature Distribution during Curing Thick Thermoset Composite Laminates." Materials Science Forum 544-545 (May 2007): 427–30. http://dx.doi.org/10.4028/www.scientific.net/msf.544-545.427.

Full text

Abstract:

A 3-D transient heat transfer finite element (FE) analysis was performed to simulate the curing process of thick thermoset composites. The simulated temperature was compared with the available experimental data to check the validity of the analysis. The influence of thickness of composite laminates on the temperature distribution was investigated, and how the size of laminates affects the inside temperature was also discussed. The results indicate that the laminate thickness rather than the laminate size has a significant influence on temperature distribution, and the 3-D analysis offers more accurate predictions than the 1-D analysis.

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!