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Artigos de revistas sobre o tema "Fibrous composites Testing"

Autor: Grafiati

Publicado: 4 de junho de 2021

Última modificação: 29 de janeiro de 2023

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1

Trofmovich, M. A., A. L. Yurkov, A. A. Galiguzov, L. V. Malakho, L. V. Oktyabr'skaya, and S. V. Minchuk. "High-temperature transformations in the fibrous-polymer composites at ablation testing." NOVYE OGNEUPORY (NEW REFRACTORIES), no. 8 (December 27, 2018): 43–48. http://dx.doi.org/10.17073/1683-4518-2018-8-43-48.

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The comparative investigation on the ablation transformations were carried out for the phenolformaldehyde resin composites on base of silica fabric and hollow corundum micro spheres. It was establish that the corundum micro spheres addition lead to the composite's heat conductivity reduction. As a result the temperature increased at the exposed spot, the linear erosion rate increased by the factor of 2,7 and the coking front line decreased by a factor of 2,3. In the issue the ablation gave rise to the high-temperature mechanical and chemical erosion and these last in turn triggered the number

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Trofimovich, M. A., A. L. Yurkov, A. A. Galiguzov, A. P. Malakho, L. V. Oktyabr’skaya, and S. V. Minchuk. "High-Temperature Transformations in Fibrous-Polymer Composites During Ablation Testing." Refractories and Industrial Ceramics 59, no. 4 (November 2018): 410–15. http://dx.doi.org/10.1007/s11148-018-0245-x.

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Sztuk - Sikorska, Ewa, and Leon Gradon. "Biofouling reduction for improvement of depth water filtration. Filter production and testing." Chemical and Process Engineering 37, no. 3 (September 1, 2016): 319–30. http://dx.doi.org/10.1515/cpe-2016-0026.

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AbstractWater is a strategic material. Recycling is an important component of balancing its use. Deep-bed filtration is an inexpensive purification method and seems to be very effective in spreading water recovery. Good filter designs, such as the fibrous filter, have high separation efficiency, low resistance for the up-flowing fluid and high retention capacity. However, one of the substantial problems of this process is the biofouling of the filter. Biofouling causes clogging and greatly reduces the life of the filter. Therefore, the melt-blown technique was used for the formation of novel a

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4

Zhang, Wenfu, Cuicui Wang, Shaohua Gu, Haixia Yu, Haitao Cheng, and Ge Wang. "Physical-Mechanical Properties of Bamboo Fiber Composites Using Filament Winding." Polymers 13, no. 17 (August 29, 2021): 2913. http://dx.doi.org/10.3390/polym13172913.

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In order to study the performance of the bamboo fiber composites prepared by filament winding, composites reinforced with jute fiber and glass fiber were used as control samples. The structure and mechanical properties of the composites were investigated by scanning electric microscope (SEM), tensile testing, bending testing, and dynamic mechanical analysis. The results demonstrated that the bamboo fiber composites exhibited lower density (0.974 g/cm3) and mechanical properties in comparison of to fiber composite and glass fiber composite, because the inner tissue structure of bamboo fiber was

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Lausch, J., M. Takla, and H. G. Schweiger. "Crush testing approach for flat-plate fibrous materials." Composites Part B: Engineering 200 (November 2020): 108333. http://dx.doi.org/10.1016/j.compositesb.2020.108333.

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Alireza, Amiri Asfarjani, Adibnazari Sayid, and Reza Kashyzadeh Kazem. "Experimental and Finite Element Analysis Approach for Fatigue of Unidirectional Fibrous Composites." Applied Mechanics and Materials 87 (August 2011): 106–12. http://dx.doi.org/10.4028/www.scientific.net/amm.87.106.

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Fibrous composites are finding more and more applications in aerospace, automotive, and naval industries. They have high stiffness and strength to weight ratio and good rating in regards to life time fatigue. Investigating mechanical behavior under dynamic loads to replace this material is very important. In the present article, investigate Fatigue of Unidirectional Fibrous Composites by using finite element analysis. So, to achieve this purpose Firstly, modeling fiber and matrix in separate case and simulated semi actual conditions, attained S-N curve of fiber and matrix and after that by usi

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Zolkiewski, Sławomir. "Mechanical Properties of Fibre-Metal Composites Connected by Means of Bolt Joints." Advanced Materials Research 837 (November 2013): 296–301. http://dx.doi.org/10.4028/www.scientific.net/amr.837.296.

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The fibre-metal laminates made of a steel plate and fibreglass laminate plate were tested in the special laboratory stands. Epoxy resin and polyester resin were used as matrix to fabricate the composites. The fibre-metal laminates combine advantages of metals and laminates. These materials have very good force versus displacement characteristics and overall mechanical properties. They are very popular and widely applied in technical systems. They can be put to use in connecting materials made of various fabrics, connecting high number layer laminates and most of all connecting metals and lamin

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Md Ali, Afifah, Mohd Zaidi Omar, Mohd Shukor Salleh, Hanizam Hashim, Intan Fadhlina Mohamed, and Nur Farah Bazilah Wakhi Anuar. "Mechanical Behaviour and Morphology of Thixoformed Aluminium Alloy Reinforced by Graphene." Materials 15, no. 19 (September 30, 2022): 6791. http://dx.doi.org/10.3390/ma15196791.

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Thixoforming is a promising method that offers several advantages over both liquid and solid processing. This process utilizes semi-solid behaviour and reduces macrosegregation, porosity and forming forces during the shaping process. Microstructural and mechanical characterization of 0.3, 0.5 and 1.0 wt% graphene nanoplatelet (GNP) reinforced A356 aluminium alloy composite fabricated by thixoforming was investigated. Stir casting was employed to fabricate feedstocks before they were thixoformed at 50% liquid. The microstructure was characterized and evaluated by field emission scanning electro

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Mermerdaş, Kasım, Süleyman İpek, and Zana Mahmood. "Visual inspection and mechanical testing of fly ash-based fibrous geopolymer composites under freeze-thaw cycles." Construction and Building Materials 283 (May 2021): 122756. http://dx.doi.org/10.1016/j.conbuildmat.2021.122756.

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Qu, Yingying, Ping Xu, Hu Liu, Qianming Li, Ning Wang, Shuaiguo Zhao, Guoqiang Zheng, Kun Dai, Chuntai Liu, and Changyu Shen. "Tunable temperature-resistivity behaviors of carbon black/polyamide 6 /high-density polyethylene composites with conductive electrospun PA6 fibrous network." Journal of Composite Materials 53, no. 14 (December 6, 2018): 1897–906. http://dx.doi.org/10.1177/0021998318815731.

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Temperature-resistivity behaviors of carbon black/polyamide 6/high-density polyethylene conductive polymer composites containing electrospun polyamide 6 fibrous network were studied systematically. The positive temperature coefficient intensity of the conductive polymer composites increased firstly and then reduced gradually with increasing heating rate, showing a heating rate-dependent positive temperature coefficient intensity. The fascinating phenomenon was ascribed to the microstructure change of conductive network induced by the volume expansion and the thermal residual stress generated i

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Mikołajczyk, Zbigniew, Katarzyna Pieklak, and Aleksandra Roszak. "Knitted Meshes for Reinforcing Building Composites." Fibres and Textiles in Eastern Europe 27, no. 4(136) (August 31, 2019): 102–11. http://dx.doi.org/10.5604/01.3001.0013.1826.

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Modern technical textiles, including knitted fabrics, are widely used in the construction industry. Regarding textiles in concrete reinforcement, methods based on shredded fibres, meshes, reinforcing mats, woven textiles and knitted DOStapes are frequently used as underlays of concrete constructions. Textiles are also used in the reinforcement of fibrous FRP composites. The research presented focused on producing composites made of MapeiMapefill concrete mass with reinforcement in the form of three variants of knitted meshes made of 228 tex polyamide threads, polypropylene threads of 6.3 tex a

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Querido, Victor A., José Roberto M. d’Almeida, and Flávio A. Silva. "Development and analysis of sponge gourd (Luffa cylindrica L.) fiber-reinforced cement composites." BioResources 14, no. 4 (October 31, 2019): 9981–93. http://dx.doi.org/10.15376/biores.14.4.9981-9993.

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Sponge gourd (Luffa cylindrica L.) fiber-reinforced cement composites were developed and analyzed. Dried sponge gourd fruit’s fibrous vascular system forms a natural 3D network that can reinforce matrices in composite materials, diverting cracks along the complex array of 3D interfaces between the fibers and the cementitious matrix. To avoid fiber deterioration, the cement paste was modified by incorporating pozzolanic materials. The fibers were mechanically characterized by tensile testing of strips of the 3D natural fiber array and of single fibers extracted from the array. The fibers had an

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13

Jinga, Zamfirescu, Voicu, Enculescu, Evanghelidis, and Busuioc. "PCL-ZnO/TiO2/HAp Electrospun Composite Fibers with Applications in Tissue Engineering." Polymers 11, no. 11 (November 1, 2019): 1793. http://dx.doi.org/10.3390/polym11111793.

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The main objective of the tissue engineering field is to regenerate the damaged parts of the body by developing biological substitutes that maintain, restore, or improve original tissue function. In this context, by using the electrospinning technique, composite scaffolds based on polycaprolactone (PCL) and inorganic powders were successfully obtained, namely: zinc oxide (ZnO), titanium dioxide (TiO2) and hydroxyapatite (HAp). The novelty of this approach consists in the production of fibrous membranes based on a biodegradable polymer and loaded with different types of mineral powders, each of

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Pérez-Salinas, Cristian, Christian Castro, and Roberto Valencia. "The cubic regression model of thermal estimation in the flammability test of the fibrous compound used in bus bodies." MATEC Web of Conferences 264 (2019): 02004. http://dx.doi.org/10.1051/matecconf/201926402004.

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The fire behavior of fiber compounds is a serious concern in automotive applications. The objective of the proposed work is to predict thermal behavior during flammability testing of the composite material of polymer matrix reinforced with fiberglass used in the interior lining of bodies. Different regression models were performed to determine the best fit. This regression analysis determines the existing correlation between the acquired parameters of burn time and temperature versus two types of fibers used for the interior decorative lining. Different regression coefficients were determined

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15

Esfandiari, Puria, João Francisco Silva, Paulo Jorge Novo, João Pedro Nunes, and Antonió Torres Marques. "Production and processing of pre-impregnated thermoplastic tapes by pultrusion and compression moulding." Journal of Composite Materials 56, no. 11 (March 25, 2022): 1667–76. http://dx.doi.org/10.1177/00219983221083841.

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Although there is no doubt that composite materials are the future of lightweight structures and components, most of composites currently produced are made from thermoset polymers, which are not able to be recycled or reprocessed. In contrast, thermoplastic polymers offer the possibility to recycle and reprocess and when combined with a fibrous reinforcement, provide interesting mechanical properties. This work reviews the production of two thermoplastic pre-impregnated materials in a tape form, one of which is produced on new prototype equipment developed in our laboratories. The method for t

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Mohsan, Ali Hasan, and Nadia A. Ali. "Electro spinning of Polycaprolactone / Hydroxyapatite Composites in Wound Dressing Application." Iraqi Journal of Physics (IJP) 20, no. 1 (March 1, 2022): 14–25. http://dx.doi.org/10.30723/ijp.v20i1.703.

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Polycaprolactone polymer is widely used in medical applications due to its biocompatibility. Electro spinning was used to create poly (ε- caprolactone) (PCL) nanocomposite fiber mats containing hydroxyapatite (HA) at concentrations ranging from 0.05 to 0.4% wt. The chemical properties of the fabricated bio composite fibers were evaluated using FTIR and morphologically using field-emission scanning-electron microscopy (FESEM), Porosity, contact angle, as well as mechanical testing(Young Modulus and Tensile strength) of the nanofibers were also studied. The FTIR results showed that all the bonds

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17

Murali, Gunasekaran, Nandhu Prasad, Sergey Klyuev, Roman Fediuk, Sallal R. Abid, Mugahed Amran, and Nikolai Vatin. "Impact Resistance of Functionally Layered Two-Stage Fibrous Concrete." Fibers 9, no. 12 (December 20, 2021): 88. http://dx.doi.org/10.3390/fib9120088.

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The impact resistance of functionally layered two-stage fibrous concrete (FLTSFC) prepared using the cement grout injection technique was examined in this study. The impact resistance of turtle shells served as the inspiration for the development of FLTSFC. Steel and polypropylene fibres are used in more significant quantities than usual in the outer layers of FLTSFC, resulting in significantly improved impact resistance. An experiment was carried out simultaneously to assess the efficacy of one-layered and two-layered concrete to assess the effectiveness of three-layered FLTSFC. When performi

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Fonteles, Carlos Alberto Lopes, Gustavo Figueiredo Brito, Laura Hecker Carvalho, Tatianny Soares Alves, and Renata Barbosa. "Composites Based on Thermoset Resin and Orbignya phalerata (Babassu Coconut): Evaluation of Mechanical Properties, Morphology and Water Sorption." Materials Science Forum 869 (August 2016): 237–42. http://dx.doi.org/10.4028/www.scientific.net/msf.869.237.

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Researches in plant fiber composites have been developed with greater frequency during the last years, especially on environmental issues. The opening of the market, especially in the automotive sector, points to the replacement of synthetic additives by natural reinforcements. Characteristics such as low density and abrasiveness, superior mechanical properties and low cost are the most sought in these composites. The aim of this study was to evaluate the behavior of composites based polyester matrix and fiber of the babassu coconut epicarp, at levels of 5, 7.5 and 10% under testing of tensile

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Prasad, Nandhu, Gunasekaran Murali, and Nikolai Vatin. "Modified Falling Mass Impact Test Performance on Functionally Graded Two Stage Aggregate Fibrous Concrete." Materials 14, no. 19 (October 6, 2021): 5833. http://dx.doi.org/10.3390/ma14195833.

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This research examined the performance of functionally graded two-stage fibrous concrete (FTSFC) against modified repeated falling-mass impacts. This study led to the concept of creating improved multiphysics model of fibre composites with better impact resistance for potential protective constructions. FTSFC was developed based on the bio-inspiring strength of turtle shells. The excellent impact resistance of FTSFC was accomplished by including a larger quantity of steel and polypropylene fibres in the outer layers. At the same time, one- and two-layered concrete were cast and compared to eva

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El-Sabbagh, A., I. Taha, and R. Taha. "Prediction of the Modulus of Elasticity of Short Fibre Reinforced Polymer Composites by Finite Element Modelling." Polymers and Polymer Composites 19, no. 9 (November 2011): 733–42. http://dx.doi.org/10.1177/096739111101900903.

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Recently, there has been increased interest in fibre-reinforced polymer composites, due to their distinctive specific strength, corrosion resistance and fatigue resistance, as well as high damping characteristics. In this paper, finite-element models for the prediction of the modulus of elasticity of short-fibre reinforced composites (SFRC) are introduced. The stiffness of a structure is of principal importance in many engineering applications and the modulus of elasticity is often one of the primary properties considered when selecting a material. In the developed models, different factors af

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21

Muangma, Rakdiaw, Supattra Wongsaenmai, and Tawat Soitong. "Numerical-Experimental Model and Polynomial Regression Method for Interpretation of G-BHN Relation of Kraft-Based Fibrous Composites Evaluated by Using Brinell Analysis." Key Engineering Materials 798 (April 2019): 370–75. http://dx.doi.org/10.4028/www.scientific.net/kem.798.370.

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This research focused on the mathematical model that could be simplified as the series function. This function used for macroscopic explanation of the relationship between shear modulus and Brinell hardness of fibrous composites. Kraft paper was used as the sample for this testing. The paper-grammage was varied as following:150, 230, and 420, whereas, the dwell time of indentation was ranging as: 10, 20, and 30 seconds, respectively. And then, the correlation between shear modulus (G) and Brinell Hardness Number (BHN) was obtained by using the simulation of experimental results. These were col

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Alyousef, Rayed, Hossein Mohammadhosseini, Ahmed Abdel Khalek Ebid, and Hisham Alabduljabbar. "An Integrated Approach to Using Sheep Wool as a Fibrous Material for Enhancing Strength and Transport Properties of Concrete Composites." Materials 15, no. 5 (February 22, 2022): 1638. http://dx.doi.org/10.3390/ma15051638.

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An important goal to achieve sustainable development is to use raw materials that are easily recyclable and renewable, locally available, and eco-friendly. Sheep wool, composed of 60% animal protein fibers, 10% fat, 15% moisture, 10% sheep sweat, and 5% contaminants on average, is an easily recyclable, easily renewable, and environmentally friendly source of raw material. In this study, slump testing, compressive and flexural strengths, ultrasonic pulse velocity, sorptivity, and chloride penetration tests were investigated to assess the influence of wool fibers on the strength and transport pr

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Pierdzig, Stefan. "Regulations Concerning Naturally Occurring Asbestos (NOA) in Germany—Testing Procedures for Asbestos." Environmental and Engineering Geoscience 26, no. 1 (February 20, 2020): 67–71. http://dx.doi.org/10.2113/eeg-2278.

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ABSTRACT In Germany, potential asbestos-containing rocks are used as raw materials for a number of engineering applications. These rocks are ultrabasites (dunite, harzburgite), igneous rocks (basalt, gabbro, norite), and metasomatic or metamorphic rocks like talcum, greenschist and amphibolite. Based on the German Gefahrstoffverordung (Hazardous Substances Ordinance), regulatory statutes exist for operations using these rocks and resultant composites and products. The authorities state that in Germany no natural rocks exist with more than 0.1 mass-% of one of the six regulated asbestos mineral

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Laurent, Christian M., Colin Palmer, Richard P. Boardman, Gareth Dyke, and Richard B. Cook. "Nanomechanical properties of bird feather rachises: exploring naturally occurring fibre reinforced laminar composites." Journal of The Royal Society Interface 11, no. 101 (December 6, 2014): 20140961. http://dx.doi.org/10.1098/rsif.2014.0961.

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Flight feathers have evolved under selective pressures to be sufficiently light and strong enough to cope with the stresses of flight. The feather shaft (rachis) must resist these stresses and is fundamental to this mode of locomotion. Relatively little work has been done on rachis morphology, especially from a mechanical perspective and never at the nanoscale. Nano-indentation is a cornerstone technique in materials testing. Here we use this technique to make use of differentially oriented fibres and their resulting mechanical anisotropy. The rachis is established as a multi-layered fibrous c

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Prabhakaran, S., V. Krishnaraj, Hemashree Golla, and M. Senthilkumar. "Biodegradation behaviour of green composite sandwich made of flax and agglomerated cork." Polymers and Polymer Composites 30 (January 2022): 096739112211036. http://dx.doi.org/10.1177/09673911221103602.

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Material experts are striving to use natural resources as skin and core in composite sandwiches to achieve light weight, biodegradability, and cost benefits. This paper reports one such newly developed green composite sandwich and its biodegradable behavior. The skin and core of newly developed sandwich are flax fiber and agglomerated cork respectively. This composite sandwich is manufactured by vacuum bagging technique in order to get higher volume fraction of fiber. The biodegradability testing of the composite sandwich has been executed by soil burial test. The verification of the same has

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Krampikowska, Aleksandra, and Anna Adamczak – Bugno. "Evaluation of destructive processes in FRC composites using time-frequency analysis of AE signals." MATEC Web of Conferences 262 (2019): 06006. http://dx.doi.org/10.1051/matecconf/201926206006.

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Modern fiber-cement boards currently used in construction are made of natural raw materials such as cement, cellulose fibers and of polyvinyl alcohol (PVA) and water. They replaced the eternitic plates, which were harmful to health, originated by Ludwig Hatschek. Materials made of fiber-cement are used in construction industry as a building and finishing material for facades, internal walls and roofs. Therefore, they are exposed to environmental conditions including rainfall and temperature changes, and in particular to frequent temperature transition through 0°C in a 24-hour cycle (cyclic fre

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Mani, Mohan Prasath, and Saravana Kumar Jaganathan. "Fabrication and characterization of electrospun polyurethane blended with dietary grapes for skin tissue engineering." Journal of Industrial Textiles 50, no. 5 (April 3, 2019): 655–74. http://dx.doi.org/10.1177/1528083719840628.

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The tissue-engineered skin has emerged as a plausible alternative approach to the traditional wound dressing owing to its inherent advantages. Further, in tissue engineering applications, fibrous scaffold obtained through textile technologies is widely attractive. The present study focused on the fabrication of electrospun textile polyurethane wound dressing scaffold incorporated with grape extract. The fabricated composites showed smooth as well as reduced fiber (730 ± 127 nm) and pore (873 ± 51 nm) diameter than the control polyurethane (fiber diameter –890 ± 117 and pore diameter –1064 ± 74

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Kapsalis, Panagiotis, Tine Tysmans, Danny Van Hemelrijck, and Thanasis Triantafillou. "State-of-the-Art Review on Experimental Investigations of Textile-Reinforced Concrete Exposed to High Temperatures." Journal of Composites Science 5, no. 11 (November 5, 2021): 290. http://dx.doi.org/10.3390/jcs5110290.

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Textile-reinforced concrete (TRC) is a promising composite material with enormous potential in structural applications because it offers the possibility to construct slender, lightweight, and robust elements. However, despite the good heat resistance of the inorganic matrices and the well-established knowledge on the high-temperature performance of the commonly used fibrous reinforcements, their application in TRC elements with very small thicknesses makes their effectiveness against thermal loads questionable. This paper presents a state-of-the-art review on the thermomechanical behavior of T

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Tan, Qiaoyin, Cuicui Wu, Lei Li, Weide Shao, and Min Luo. "Nanomaterial-Based Prosthetic Limbs for Disability Mobility Assistance: A Review of Recent Advances." Journal of Nanomaterials 2022 (March 31, 2022): 1–10. http://dx.doi.org/10.1155/2022/3425297.

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The emergence of new hybrid nanomaterial has enabled prosthetic devices to have more performance and significantly improved the quality of life of the disabled. Due to the biosensing properties of prosthetic limbs made of nanomaterials, a large number of nanocomposites have been designed, developed, and evaluated for various prosthetic limbs, such as e-skin, e-skin’s neurotactility sensing, human prosthetic interface tissue engineering, bones, and biosensors. Nano-based materials are also considered to be the new generation of scientific and technological materials for the preparation of vario

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Łandwijt, Marcin, Marcin H. Struszczyk, Wiesława Urbaniak-Domagała, Adam K. Puszkarz, Bożena Wilbik-Hałgas, Magdalena Cichecka, and Izabella Krucinska. "Ballistic Behaviour of PACVD-Modified Textiles." Fibres and Textiles in Eastern Europe 27, no. 1(133) (February 28, 2019): 85–90. http://dx.doi.org/10.5604/01.3001.0012.7512.

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A comprehensive study was performed using the Plasma Assisted Chemical Vapour Deposition (PACVD) modification of ultrahigh molecular weight polyethylene (UHMWPE) fibrous composites and paramid fabrics with the deposition of fluoro-or silane-like-polymer onto their surface. Research on the resistance to fragments was performed on the basis of our own testing procedure elaborated on the basis of the STANAG 2920 Ballistic Test Method For Personal Armour Materials And Combat Clothing, revision 2. The model insert systems made of the modified or unmodified unwoven sheets of UHMWPE fibres exhibited

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Santulli, Carlo, Marco Rallini, Debora Puglia, Serena Gabrielli, Luigi Torre, and Enrico Marcantoni. "Characterization of Licorice Root Waste for Prospective Use as Filler in more Eco-Friendly Composite Materials." Processes 8, no. 6 (June 24, 2020): 733. http://dx.doi.org/10.3390/pr8060733.

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The extraction of glycyrrhizin from licorice root and stolon with ethanol/water solutions leaves a lignocellulosic residue, which could be potentially applied in biocomposites. This process proved difficult in principle, given the considerable hardness of this material as received, which impedes its use in polymer resins in large amounts. After ball milling, up to 10% of this fibrous residue, which shows very variable aspect ratio, was introduced into an epoxy matrix, to investigate its possible future application in sustainable polymers. Of the three composites investigated, containing 1, 5 a

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Wang, Biao, Rui Juan Xie, and Yang Yang Huang. "Preparation and Characterization of Silk Fibroin/Calcium Phosphate Composite." Advanced Materials Research 332-334 (September 2011): 1655–58. http://dx.doi.org/10.4028/www.scientific.net/amr.332-334.1655.

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In this paper, calcium phosphate cement (CPC) was prepared with tetracalcium phosphate (TTCP)/dicalcium phosphate anhydrous (DCPA) system as solid phase and phosphate buffered solution (PBS) as liquid phase, then silk fibroin (SF) was added into CPC to form silk fibroin/calcium phosphate composite. To study the effect of SF on the properties of composite, different mass fraction of SF was added into the composite. The surface morphology was observed by Scanning Electron Microscope. The setting time was investigated by ISO Cement Standard Consistency Instrument. The structure of the composite w

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Almudaihesh, Faisel, Stephen Grigg, Karen Holford, Rhys Pullin, and Mark Eaton. "An Assessment of the Effect of Progressive Water Absorption on the Interlaminar Strength of Unidirectional Carbon/Epoxy Composites Using Acoustic Emission." Sensors 21, no. 13 (June 25, 2021): 4351. http://dx.doi.org/10.3390/s21134351.

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Carbon Fibre-Reinforced Polymers (CFRPs) in aerospace applications are expected to operate in moist environments where carbon fibres have high resistance to water absorption; however, polymers do not. To develop a truly optimised structure, it is important to understand this degradation process. This study aims to expand the understanding of the role of water absorption on fibrous/polymeric structures, particularly in a matrix-dominant property, namely interlaminar strength. This work used Acoustic Emission (AE), which could be integrated into any Structural Health Monitoring System for aerosp

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Abbass, Ahmmad A., Sallal R. Abid, Ali I. Abed, and Sajjad H. Ali. "Experimental and Statistical Study of the Effect of Steel Fibers and Design Strength on the Variability in Repeated Impact Test Results." Fibers 11, no. 1 (December 30, 2022): 4. http://dx.doi.org/10.3390/fib11010004.

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The ACI 544-2R repeated impact test is known as a low-cost and simple qualitative test to evaluate the impact strength of concrete. However, the test’s main deficiency is the high variability in its results. The effect of steel fibers and the compressive strength of concrete on the variability in repeated impact test results was investigated experimentally and statically in this study. Two batches from four mixtures were prepared and tested for this purpose. Hooked-end steel fibers were utilized in the fibrous mixtures. The mixtures NC, NC-SF0.5 and NC-SF1.0 were normal strength mixtures with

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Dhandayuthapani, Brahatheeswaran, Saino Hanna Varghese, Ravindran Girija Aswathy, Yasuhiko Yoshida, Toru Maekawa, and D. Sakthikumar. "Evaluation of Antithrombogenicity and Hydrophilicity on Zein-SWCNT Electrospun Fibrous Nanocomposite Scaffolds." International Journal of Biomaterials 2012 (2012): 1–10. http://dx.doi.org/10.1155/2012/345029.

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Design of blood compatible surfaces is required to minimize platelet surface interactions and increase the thromboresistance of foreign surfaces when they are used as biomaterials especially for artificial blood prostheses. In this study, single wall carbon nanotubes (SWCNTs) and Zein fibrous nanocomposite scaffolds were fabricated by electrospinning and evaluated its antithrombogenicity and hydrophilicity. The uniform and highly smooth nanofibers of Zein composited with different SWCNTs content (ranging from 0.2 wt% to 1 wt%) were successfully prepared by electrospinning method without the oc

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Sarkar, Lisa, Mudigunda V. Sushma, Bhavani Prasad Yalagala, Aravind Kumar Rengan, Shiv Govind Singh, and Siva Rama Krishna Vanjari. "ZnO nanoparticles embedded silk fibroin—a piezoelectric composite for nanogenerator applications." Nanotechnology 33, no. 26 (April 8, 2022): 265403. http://dx.doi.org/10.1088/1361-6528/ac5d9f.

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Abstract This paper demonstrates a flexible nanogenerator (NG) using Silk-Zinc Oxide (ZnO) composite by exploiting the inherent piezoelectric properties of silk and ZnO. A direct precipitation method was employed to synthesize Zinc Oxide nanoparticles (NPs). Silk-ZnO composite film was then prepared by spin-coating the homogenous silk-ZnO solution. The composition and morphology of silk-ZnO composite were analyzed using various standard characterization procedures. The biocompatibility study of the composite film was also performed through cell viability testing. The utility of as prepared com

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Kamal, Tahseen, Mazhar Ul-Islam, Sher Bahadar Khan, Esraa M. Bakhsh, and Muhammad Tariq Saeed Chani. "Preparation, Characterization, and Biological Features of Cactus Coated Bacterial Cellulose Hydrogels." Gels 8, no. 2 (January 30, 2022): 88. http://dx.doi.org/10.3390/gels8020088.

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The current study was aimed at developing BC-Cactus (BCC) composite hydrogels with impressive mechanical features for their potential applications in medical and environmental sectors. BCC composites hydrogels were developed through cactus gel coating on a never dried BC matrix. The FE-SEM micrographs confirmed the saturation of BC fibrils with cactus gel. Additionally, the presence of various functional groups and alteration in crystalline behavior was confirmed through FTIR and XRD analysis. Mechanical testing illustrated a three-times increase in the strain failure and an increase of 1.6 ti

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Xiong, Jie, Pengfei Huo, and Frank K. Ko. "Fabrication of ultrafine fibrous polytetrafluoroethylene porous membranes by electrospinning." Journal of Materials Research 24, no. 9 (September 2009): 2755–61. http://dx.doi.org/10.1557/jmr.2009.0347.

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Poly(vinyl alcohol) (PVA) and poly(tetrafluoroethylene) (PTFE) emulsion were blended with different mass concentrations and the blended spinning solutions were electrospun into composite nanofibers. The influence of the blend ratio of PVA to PTFE and electrospinning technical parameters on the morphology and diameter of the composite nanofibers were investigated. According to the result of thermogravimetric analyzer analysis, the composite membrane was sintered at 390 °C. The membranes were then characterized by differential scanning calorimetry, attenuated total reflection-Fourier transform i

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Syafri, Rahmadini, Chairil Chairil, Muhammad Rizqi Pratama, Muhammad Alfayed, Kardina Febriani, and Hardi Rahayu Saputra. "Utilization of Rubber seed shell and Palm Oil Fronds as Composite Materials for Automotive Industry." Jurnal Kimia Sains dan Aplikasi 23, no. 4 (March 20, 2020): 102–8. http://dx.doi.org/10.14710/jksa.23.4.102-108.

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Rubber seed shell (RSS) and Palm Oil Fronds (POF) are types of solid waste produced from rubber and palm oil plantation that has not been fully utilized. Meanwhile, in the automotive industry, composites have been the material of choice in some of its components. For example, composite body panels have been widely used in sports cars and passenger cars. This study aimed to utilize RSS powder and POF fiber waste as reinforcing fillers for the composite matrix. The matrix used was liquid polyester resin with the addition of catalyst as a hardener. RSS, which has been carbonized, was then activat

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Gilat, Amos, and Jeremy D. Seidt. "Compression, Tension and Shear Testing of Fibrous Composite with the Split Hopkinson Bar Technique." EPJ Web of Conferences 183 (2018): 02006. http://dx.doi.org/10.1051/epjconf/201818302006.

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The Split Hopkinson Bar (SHB) technique is used for high strain rate testing of T800/F3900 composite in compression, tension and shear. Digital Image Correlation (DIC) is used for measuring the full-field deformation on the surface of the specimen by using Shimadzu HPV-X2 high-speed video camera. Compression tests have been done on specimens machined from a unidirectional laminate in the 0°and 90° directions. Tensile tests were done in the 90° direction. Shear tests were done by using a notched specimen in a compression SHB apparatus. To study the effect of strain rate, quasi-static testing wa

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Zhou, Zhiya. "Garment Digital Design Method Oriented to the Production Process of Graphene-Modified Nylon Knitted Fabric." Journal of Nanomaterials 2022 (March 18, 2022): 1–13. http://dx.doi.org/10.1155/2022/6114483.

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Graphene is a single-atom-thick layer of carbon atoms, the thinnest material ever discovered. The special single atomic layer structure of graphene makes it have many unique physical and chemical properties, and these excellent properties make graphene have a bright application prospect in the field of composite materials. The use of modern digital production technology to coordinate the management of various production departments of an enterprise can greatly reduce the input of human resources and improve the utilization of materials and equipment resources. In the process of caprolactam mon

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Dessalegn, Yalew, Balkeshwar Singh, Aart W. van Vuure, Irfan Anjum Badruddin, Habtamu Beri, Mohamed Hussien, Gulam Mohammed Sayeed Ahmed, and Nazia Hossain. "Investigation of Bamboo Fibrous Tensile Strength Using Modified Weibull Distribution." Materials 15, no. 14 (July 19, 2022): 5016. http://dx.doi.org/10.3390/ma15145016.

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Ethiopia has a large coverage of bamboo plants that are used for furniture making and house building. So far, researchers have not studied the strength of Ethiopian bamboo fibers, which are utilized for composite applications. The current study measured the strength of bamboo fibers based on various testing lengths and calculated the predictive tensile strength using a modified Weibull distribution. Moreover, the quality of the extraction machine is evaluated based on shape and sensitivity parameters. This research paper incorporates the coefficient of variation of the fiber diameters, conside

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Anoshkin, A. N., V. Yu Zuiko, A. V. Tchugaynova, and E. N. Shustova. "Experimental-Theoretical Research of Mechanical Properties of Perforated Composite Sandwich Panels." Solid State Phenomena 243 (October 2015): 1–10. http://dx.doi.org/10.4028/www.scientific.net/ssp.243.1.

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This work is devoted to experimental-theoretical analysis of mechanical properties of sandwich panels made of fibrous polymer composite materials. The structures with tubular core were considered. Numerical simulations of the mechanical behaviour and tensile testing of full-scale samples of sandwich panels were done. The analysis of influence of perforation on mechanical properties of fiberglass laminates and sandwich panels was alsoperformed.

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Wang, Biao, Rui Juan Xie, Qiong Wan, Yang Wang, and Yang Yang Huang. "Effect of Silk Fibroin on the Properties of Calcium Phosphate Cement." Advanced Materials Research 175-176 (January 2011): 100–104. http://dx.doi.org/10.4028/www.scientific.net/amr.175-176.100.

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To improve the physicochemical properties of calcium phosphate cement (CPC), silk fibroin (SF) in the different forms were added into CPC. The structure of the composites was studied by X-ray diffraction. The setting time was investigated by ISO Cement Standard Consistency Instrument. Scanning Electron Microscope was used to observe the surface morphology. Mechanical properties of samples were tested by Instron Universal Testing Machine. The results indicated that acicular crystal of hydroxyapatite (HA) was formed in the hardening body of both CPC with SF and the pure CPC. Addition of SF had n

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Hamad, Sameer F., Nicola Stehling, Simon A. Hayes, Joel P. Foreman, and C. Rodenburg. "Exploiting Plasma Exposed, Natural Surface Nanostructures in Ramie Fibers for Polymer Composite Applications." Materials 12, no. 10 (May 18, 2019): 1631. http://dx.doi.org/10.3390/ma12101631.

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Nanoscale surface morphology of plant fibers has important implications for the interfacial bonding in fiber-polymer composites. In this study, we investigated and quantified the effect of plasma-surface modification on ramie plant fibers as a potential tool for simple and efficient surface modification. The extensive investigation of the effects of plasma treatment of the fiber surface nano-morphology and its effect on the fiber-polymer interface was performed by Low-Voltages Scanning Electron Microscopy (LV-SEM), infrared spectroscopy (FT-IR) analysis, fiber-resin angle measurements and mech

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Hu, Zhanao, Wasim Akram, Shixian Chen, Shuqin Yan, and Qiang Zhang. "Facile Fabrication of Silk Fibroin/Konjac Glucomannan Composite Membranes." AATCC Journal of Research 8, no. 2_suppl (December 2021): 23–27. http://dx.doi.org/10.14504/ajr.8.s2.5.

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Silk fibroin (SF)-based biocomposites have attracted considerable attention for several decades, due to excellent biocompatibility and mechanical toughness. However, insufficient hydrophilicity and mechanical brittleness limit its practical application, especially in tissue engineering. In this study, by blending konjac glucomannan (KGM) with SF, along with the water-insoluble treatment of ethanol and ammonia, SF/KGM composite membranes were generated with good flexibility and water adsorption capacity. Scanning electron microscopy (SEM) showed that KGM/SF membrane surfaces were uniform and de

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Si, Yi, and D. S. Kevluzov. "Research on the Long-Lasting and Remelting Properties of Nd Modification Effect on Cast Al-Mg₂Si Metal Matrix Composite." Materials Science Forum 1001 (July 2020): 196–201. http://dx.doi.org/10.4028/www.scientific.net/msf.1001.196.

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The cast Al-Mg2Si metal matrix composite was prepared by metal model casting process with rare earth element Nd as the modificator. The effects of modification duration and remelting times on microstructure and mechanical properties of the composite were investicated by optical microscope (OM) and electronic universal testing machine. The results show that, after introducing a proper amount of Nd, both primary and eutectic Mg2Si in the Al-18 wt.%Mg2Si composite were well modified. The morphology of primary Mg2Si is changed from irregular or dendritic to polyhedral shape and the morphology of t

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Smirnov, Maksim M., and Andrey R. Korabelnikov. "OBTAINING COMPOSITE FIBROUS MATERIALS BY ELECTROSPINNING FROM SOLUTIONS OF POLYMETHYL METHACRYLATE WITH THE ADDITION OF CARBON NANOTUBES." Technologies & Quality 52, no. 2 (July 2, 2021): 56–61. http://dx.doi.org/10.34216/2587-6147-2021-2-52-56-61.

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The article is devoted to the research and testing of a method for producing nonwoven material from nano- and microfibres saturated with carbon nanotubes by the method of electrospinning, the study of the effect of ultrasonic treatment of a polymer solution and the addition of carbon nanotubes on the properties of the solution and the morphology of the resulting material. As a result of the study, samples of materials were obtained from solutions of polymethylmethacrylate, treated and not treated with ultrasound, organoleptic and microscopic studies of the obtained samples were carried out. A

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Alifanov, O. M., S. A. Budnik, A. V. Nenarokomov, and D. M. Titov. "Experimental testing of heat flux sensors based on the inverse problem technique." VESTNIK of Samara University. Aerospace and Mechanical Engineering 18, no. 4 (January 21, 2020): 7–17. http://dx.doi.org/10.18287/2541-7533-2019-18-4-7-17.

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In final adjustment of thermally-loaded elements of space structures information on thermal loads (heat fluxes and surface temperatures) for the whole period of flight in the atmosphere is of primary importance. The level of temperature and the processes taking place on the surface of the heat shield do not always allow using conventional methods of measuring thermal loads. In this case determining thermal loads by the results of measuring the temperature at several points of elements of the heat shield structure is an alternative to direct measurements. The aim of this work is to develop and

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Doench, Ingo, Tuan Tran, Laurent David, Alexandra Montembault, Eric Viguier, Christian Gorzelanny, Guillaume Sudre, et al. "Cellulose Nanofiber-Reinforced Chitosan Hydrogel Composites for Intervertebral Disc Tissue Repair." Biomimetics 4, no. 1 (February 20, 2019): 19. http://dx.doi.org/10.3390/biomimetics4010019.

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The development of non-cellularized composites of chitosan (CHI) hydrogels, filled with cellulose nanofibers (CNFs) of the type nanofibrillated cellulose, was proposed for the repair and regeneration of the intervertebral disc (IVD) annulus fibrosus (AF) tissue. With the achievement of CNF-filled CHI hydrogels, biomaterial-based implants were designed to restore damaged/degenerated discs. The structural, mechanical and biological properties of the developed hydrogel composites were investigated. The neutralization of weakly acidic aqueous CNF/CHI viscous suspensions in NaOH yielded composites

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