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Journal articles on the topic 'Composite materials – Quality control'

Author: Grafiati
Published: 4 June 2021
Last updated: 18 February 2022

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1

Garkina, Irina, and Alexander Danilov. "Control of Properties of Composite Materials - Quality Functional." Defect and Diffusion Forum 394 (August 2019): 15–19. http://dx.doi.org/10.4028/www.scientific.net/ddf.394.15.

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Methodological principles for the development of composite materials with the desiredstructure and properties are proposed. One of the perspective directions of development ofcomposite materials by their representation as multi-purpose systems with the corresponding systemattributes is considered. The structure of quality functional for objective assessment of quality ofkinetic processes of formation of physic-mechanical characteristics of a composite is developed.The technique of synthesis of construction material based on application of lines of equal level ofquality functional is offered.
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2

Bityukov, Yu I., and Yu I. Deniskin. "Quality Control of Structures Made of Composite Materials." Polymer Science, Series D 11, no. 2 (2018): 197–201. http://dx.doi.org/10.1134/s1995421218020041.

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3

Dmitriev, S., A. Ishkov, Vladimir Malikov, and A. Sagalakov. "Control Quality of Composite Materials by Using Subminiature Eddy Current Transducers." Materials Science Forum 945 (February 2019): 866–72. http://dx.doi.org/10.4028/www.scientific.net/msf.945.866.

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Based eddy current transducer (ECT), a probe has been designed to research composite materials. Defects inspection of composite materials is performed to determine the following standard defects: defect of the metallic and (or) polymer layer uniformity. The subminiature ECT of the original design is used as a sensor in this device, it is made according to a differential scheme of switching on of the coils of a transformer ECT and allowing to localize the control area up to 0.1-0.5 mm. The measurement procedure allowing one to detect defects in composite materials with a high accuracy is described. The sensor was tested on the composite material consisting of paper or low-density polyethylene and aluminum layers in which the model defect was placed. The dependences of the ECT signal on the defect in this structure are given. The determined dependence of electrical conductivity of composite materials on model defects make it possible to carry out defects inspection of composite materials.
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4

Afonin, Victor V., Irina V. Erofeeva, Marina M. Zotkina, Denis V. Emelyanov, and Nikolay Yu Podzhivotov. "Reference image quality assessment of composite materials exposed to positive and negative temperatures." Vestnik MGSU, no. 1 (January 2019): 83–93. http://dx.doi.org/10.22227/1997-0935.2019.1.83-93.

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ABSTRACT Introduction. The question of a comparative assessment of the quality of images obtained as a result of scanning test composite materials exposed under the cyclic effects of positive and negative temperatures is considered. The samples are sorted relative to the reference numerical metric expressed as a percentage. Materials and methods. The compared composites differ in composition relative to the control sample. Periodic scanning of the tested composites is carried out during several control points of time. A comparative analysis of the image quality of test composites was carried out both during the entire exposure time and at the control points of time. On the basis of the existing algorithm Structural Similarity Index for measuring image quality (SSIM), percentage indicators of sample quality were determined depending on the composition and exposure time. The results obtained allow the selection of composite materials in accordance with the level of structural similarity in structural color characteristics. According to the SSIM algorithm, the resulting metric values are in the range [-1; +1]. Full structural similarity corresponds to a value equal to one. It is proposed to express the SSIM metric as a percentage with the transformation that the change in the color structural difference of the relative control sample can vary from zero to 100 %. Results. For the proposed method of comparing images of scanned samples of composite materials, ten samples of composite materials of different composition were used. Numerical results of the experiment with their graphical visualization give a clear idea of the nature of the change in color characteristics relative to the control sample. Consistent evaluation at the exposure points shows the nature of changes in the properties of materials from the duration of exposure to cyclic changes in positive and negative temperatures. Conclusions. The proposed benchmark image quality assessment based on the existing SSIM algorithm allows you to quickly investigate groups of materials, the change in properties of which is caused by their exposure in adverse operating conditions.
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5

Pileckas, Eugenijus. "DYNAMIC FOCUSING OF ELECTROACOUSTIC ARRAYS IN NON‐DESRUCTIVE CONTROL COMPOSITE MATERIALS." Aviation 14, no. 2 (2010): 49–53. http://dx.doi.org/10.3846/aviation.2010.08.

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Nowadays the application possibilities for composite materials for aviation are increasing, and monitoring their quality during production and exploitation is becoming more and more relevant. Acoustic non‐destructive control technologies provide promising possibilities for monitoring and analysing the characteristics and parameters of composites. This paper discusses an acceptable modelling method based on acoustic images of composite material analysis using a dynamic beam focusing method of an acoustic antenna array. Santrauka Vis plačiau naudojant kompozitines medžiagas aviacijoje aktualeja ir ju kokybes būsenos stebejimas konstrukciju gamybos ir eksploatacijos metu. Akustines neardomosios kontroles technologijos atveria, mūsu nuomone, perspektyvias kompozitiniu medžiagu charakteristiku bei ju parametru stebejimo ir tyrimo galimybes. Straipsnyje nagrinejamas priimtinas kompozitiniu medžiagu tyrimui akustiniu vaizdu formavimo būdas, panaudojant akustines antenu gardeles dinamini spindulio fokusavimo būda.
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6

Thomas, Matthew M., Babu Joseph, and John L. Kardos. "Batch chemical process quality control applied to curing of composite materials." AIChE Journal 43, no. 10 (1997): 2535–45. http://dx.doi.org/10.1002/aic.690431015.

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7

Voitovich, Elena Valerievna, Natalia Ivanovna Kozhukhova, Alla Vasilievna Cherevatova, Igor Vladimirovich Zhernovsky, and Maya Sergeevna Osadchaya. "Features of Quality Control of Free of Cement Binder of Non-Hydration Type." Applied Mechanics and Materials 724 (January 2015): 39–43. http://dx.doi.org/10.4028/www.scientific.net/amm.724.39.

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Analysis of methods of quality control, applied for binding systems and based materials was curried out. Also the classification of quality control methods for nanostructured binder (NB) in the light of its adaptability to this binder and composites on its basis is developed.The scheme of quality parameter control for NB and based materials in the framework of technological process "raw→binder→final composite" is developed. The basic characteristics of NB on the basis of quartz sands of different deposits are studied as well as the norms and requirements to controlled parameters when production process, allowing supplying quality of final product are determined.
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8

Ulker, Onur. "Surface Roughness of Composite Panels as a Quality Control Tool." Materials 11, no. 3 (2018): 407. http://dx.doi.org/10.3390/ma11030407.

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9

Murashov, V. V., and S. I. Trifonova. "Quality control of polymer composite materials using ultrasonic time-of-flight velocimetric technique." «Aviation Materials and Technologies», no. 4 (2015): 86–90. http://dx.doi.org/10.18577/2071-9140-2015-0-4-86-90.

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10

Thomsen, J. J., and K. Lund. "Quality control of composite materials by neural network analysis of ultrasonic power spectra." NDT & E International 25, no. 1 (1992): 42. http://dx.doi.org/10.1016/0963-8695(92)90059-p.

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11

LeClair, Steven R., Frances L. Abrams, and Richard F. Matejka. "Qualitative process automation: self-directed manufacture of composite materials." Artificial Intelligence for Engineering Design, Analysis and Manufacturing 3, no. 2 (1989): 125–36. http://dx.doi.org/10.1017/s0890060400001153.

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This paper addresses manufacturing research involving contributions in computer science, control theory and material processing science. The research objective has been to develop intelligent, †self-directed‡ control systems which enable in situ control path generation based on †product-processing‡ feedback. A †product-directed‡ control philosophy which emphasizes product quality is described together with a generic architecture for representing process knowledge. Specific details are presented involving the development and application of a self-directed material processing system for autoclave curing of composites together with recent research results, production challenges and future research in †self-improving‡ material processing systems.
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12

Garkina, Irina, Alexander Danilov, and Vladimir Selyaev. "Principles of Optimal Control in the Synthesis of Composite Materials." Key Engineering Materials 723 (December 2016): 32–36. http://dx.doi.org/10.4028/www.scientific.net/kem.723.32.

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It is proposed to use an algorithm for synthesis of composite products with the help of classical optimal control theory, it includes: technical formulation of the problem; development the criteria for optimization; construction mathematical model of the object as a set of partial models. Optimization method is determined after a complete formalization of the problem of synthesizing. It is provided for the possibility of adjusting and simplifying of mathematical problem and its individual elements. Clarification of the formulated technical problem is realized after solving mathematical problem, and iterative process can be repeated until the specified accuracy. It is shown that the synthesis of the material is to convert the object from an initial to a final state under the assumed admissible controls and accepted quality criteria. The approach is illustrated by development of composite materials for radiation protection as multi-purpose complex systems with adjustable characteristics (confirmed the efficiency of the proposed design principles).
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13

Chisholm, J. M., and H. T. Hahn. "Diametral compression of pultruded composite rods as a quality control test." Composites 20, no. 6 (1989): 514. http://dx.doi.org/10.1016/0010-4361(89)90889-6.

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14

Chisholm, J. M., H. T. Hahn, and J. G. Williams. "Diametral compression of pultruded composite rods as a quality control test." Composites 20, no. 6 (1989): 553–58. http://dx.doi.org/10.1016/0010-4361(89)90914-2.

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15

Pileckas, Eugenijus. "THE MEASUREMENTS POSSIBILITIES OF ACOUSTIC DAMPING IN COMPOSITE MATERIALS." Aviation 8, no. 4 (2004): 16–20. http://dx.doi.org/10.3846/16487788.2004.9635884.

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With the wider use of composite materials in aviation, the observation of their quality during exploitation is becoming more topical. We are of the opinion that acoustic technologies of all in one control offer us promising possibilities to observe and research the characteristics and parameters of composite materials. The purpose of this paper is to discuss some accepted ways of tuning the damping of the acoustic signals in non‐homogeneous environments for research of composite materials.
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16

Bolf, Davor, Albert Zamarin, and Robert Basan. "Composite Material Damage Processes." Journal of Maritime & Transportation Science 3, no. 3 (2020): 307–23. http://dx.doi.org/10.18048/2020.00.23.

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Composite materials are in use in the shipbuilding industry for a long period of time. Composites appear in vast number of fibre – matrix combinations and can be produced with several different production processes. Due to the specific nature of the composite material structure, the selection of the production process and the limitations in the quality control procedures, composite materials will always be subject to defects and imperfections which may, under certain circumstances, lead to the appearance and propagation of cracks. The size and the shape of the crack, the load type and the stress field in the material surrounding the crack will be crucial for crack growth and crack propagation. This paper reviews the composite material damage processes especially relevant for shipbuilding. The basic principles of composite material fracture mechanics are briefly explained, and finally, mechanisms responsible for the development of damage and fracture of composite materials are presented. This paper has emerged from the need to summarize information about composite material fracture and failure mechanisms and modes relevant for the shipbuilding industry.
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17

Pascu, Cristina Ileana, Stefan Gheorghe, Dragos Popa, and Ovidiu Popa. "Aspects about the Quality Control at First Article Inspection (FAI) for Parts Obtained by Materials Composites Used in the Railway Sector." Advanced Engineering Forum 27 (April 2018): 262–67. http://dx.doi.org/10.4028/www.scientific.net/aef.27.262.

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In the railway sector, on the prototyping phase of product made by composite materials, it is necessary the implementation of a strict quality control using the instrument First Article Inpection (FAI). In this paper some of the most important steps in quality control implementation of FAI for composite parts at the prototyping parts made of composite materials in the railway field are presented. Thus, the necessary steps for developing FAI and the process diagram are given. Also, the method FMEA process is presented in order to eliminate the risks of errors and defects during the development of the technological process for obtaining the composite piece.
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18

Kulyk, A. V., P. N. Zheltov, S. V. Klymenko, and V. V. Chabanov. "Automated system of contactless ultrasound nondestructive quality control of solid fuel rocket engines from composite materials." Kosmìčna nauka ì tehnologìâ 27, no. 3 (2021): 76–84. http://dx.doi.org/10.15407/knit2021.03.076.

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Currently, in various industries (engineering, aircraft, energy, etc.) the issue of product quality assurance and control is particularly acute. This is due primarily to the ever-increasing requirements for increasing reliability with increasing loads on products, which entails the strengthening of technical standards. The issue of quality control for rocket and space technology products is especially relevant. Modern power structures of rocket and spacecraft made of polymer composite materials, and especially the body of solid fuel rocket engines (SFRЕ), are multilayer packages of various polymer-composite materials (PKM), obtained and interconnected in the process of manufacturing the body. The efficiency of SFRЕ depends on the quality of the formation of PKM in production conditions. The most important issues are the implementation of production quality control of composite structures, the reliability of control results and the ability to automate the control process. The article presents an automated system of non-contact ultrasonic non-destructive testing, which allows to control the stability of the technological process of forming the composite material of the wall of the SFRЕ body and, if necessary, to adjust it. The probability of detecting zones of anomalous violation of the integrity of the wall material of the SFRЕ housing is carried out due to adaptive algorithms, digital systems of multilevel matrix processing and optimal filtering of the received signals. The automated system of contactless ultrasonic non-destructive quality control of SFRЕ cases allows to register conditions of scanning and control for more visual representation of the defectogram in the expanded look of the case of a product in the course of control and at documentation of its results. The presented results of work on the development of an automated system of non-destructive testing of the integrity of the buildings of the SFRЕ type "cocoon" confirm the possibilities of practical implementation in production.
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19

Szymański, Rafał, and Mateusz Zięba. "Manufacturing and Testing of Carbon Composite Samples Intended for Aviation." Transactions on Aerospace Research 2017, no. 3 (2017): 107–16. http://dx.doi.org/10.2478/tar-2017-0024.

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Abstract The paper presents the manufacturing technology and quality control of samples made of composite materials intended, inter alia, for aircraft elements. The samples are made from carbon fiber reinforced prepreg in a polymer matrix which is commonly used in the aerospace industry. The authors described the dimensional requirements for samples made of composite materials for strength testing, and the main stages of production which have a direct impact on the quality of composite samples. Also presented is the technological process of producing flat carbon composite panels for composite samples, cutting the produced panels with a CNC plotter, cutting the samples on a conventional milling machine, and surface treatment of the samples on a surface grinder. The machining parameters that were experientially found to be optimal for the milling and grinding of carbon samples are specified as well. Finally, the method of quality control of the ready composite samples is described and solutions are presented to improve the production of high-quality samples.
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20

Steele, D., and T. Malis. "Characterizing AEM sections: Ultramicrotomy ‘quality control’." Proceedings, annual meeting, Electron Microscopy Society of America 49 (August 1991): 1110–11. http://dx.doi.org/10.1017/s042482010008986x.

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The wide variety of modern materials (alloys, ceramics, composites, layered structures) and the strict demands of microanalytical techniques (energy dispersive and energy loss spectroscopies) has resulted in a growing use of mechanically-based techniques for preparation of AEM specimens. One of these techniques is ultramicrotomy or diamond knife sectioning, which is seeing increasing usage in the materials science community. A recent review of the field has pointed out a number of significant factors affecting section quality such as knife wear and uniformity when sectioning ‘hard’ materials. As materials ultramicrotomy diversifies and matures, more information is required concerning the detailed nature of such factors in order to understand the artifacts peculiar to the technique and ultimately produce sections of suitable AEM quality in a consistent fashion.
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21

Ahn, Jung Ho, Yan Li Wang, Yong Jin Kim, Sung Jin Kim, and Hyung Sik Chung. "Synthesis of Carbon Nanotube-Reinforced Al Matrix Composites." Materials Science Forum 539-543 (March 2007): 860–65. http://dx.doi.org/10.4028/www.scientific.net/msf.539-543.860.

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We have synthesized multi-wall carbon nanotube (MWCNT)-reinforced Al matrix composites. The Al/MWCNT composite powders were prepared by ball milling using pristine Al or ball-milled Al powders as starting materials. The composite powders were consolidated by a conventional cold-compaction, followed by sintering. Uniform dispersion of individual MWCNTs within the matrix was in particular a critical factor for obtaining high density and high quality Al/MWCNT composites. Compared to pristine Al powders as starting materials, the Al powders previously attrition-ball-milled with carbon-based PCA (process control agent) in an ammonia atmosphere resulted in a better distribution of carbon nanotubes within the Al matrix and a higher density after sintering.
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22

Kryvanos, A. K., A. Ph Ilyushchanka, and Ya Ya Piatsiushyk. "Quality control of mixing components of energy-saturated heterogeneous composite material." Proceedings of the National Academy of Sciences of Belarus, Physical-Technical Series 65, no. 3 (2020): 263–71. http://dx.doi.org/10.29235/1561-8358-2020-65-3-263-271.

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Methods of direct and indirect assessment of the quality of mixing dispersed solid-phase components in a liquid polymer binder are considered. It is shown that a number of methods for the quantitative estimation of mixing (associated with the extraction of solid-phase components), which have been developed in other areas of the technology of materials, are not suitable for controlling an energy-saturated heterogeneous composite material (EHCM). An experimental method revealed the criteria values (a range) of the EHCM density and determined the main groups of the EHCM characteristics, ensuring their acceptable operational properties. By means of modern research equipment using proven methods, a series of studies was carried out to establish the uniformity of the distribution of particles of solid-phase components in the EHCM, the presence, the shape, sizes and distribution in the volume of defects in the structure of the material, the physicomechanical properties of the EHCM after polymerization. According to a comparison of the results of instrumental determination of the main characteristics of the EHCM (structural, physical) with the operational properties of the material, depending on the duration of the mixing process on a specific equipment under otherwise equal conditions, it was found that for the successful solution of technological tasks it is acceptable to assess indirectly the quality of mixing according to the results of density determination of the EHCM after its polymerization. This can provide operational output quality control of the final product that does not require significant material and time costs during the development of technological processes and during the production of the EHCM.
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23

Klymenko, Svitlana, Pavlo Kiselyov, and Oleksii Kulyk. "Ultrasonic non-destructive quality control of products made of polymeric composite materials rocket and space equipment." System technologies 3, no. 134 (2021): 135–48. http://dx.doi.org/10.34185/1562-9945-3-134-2021-15.

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The development of modern rocket and space technology (RST) is characterized by constant improvement: increasing speed, range and altitude. Improving these characteristics, through modernization, has led to a significant complication of the design of RST and its equipment. Among the most promising materials for the manufacture of RST structures are more often used polymer composite materials (PCM), which are increasingly used in modern RST engineering, especially in cases where no other material meets the new requirements. Quality control of RST products depends on determining the condition of materials in these facilities, both in production and in operating conditions, which must be carried out both in the production process (with the deviation of production processes may form different types of structure heterogeneity: porosity, foreign inclusions, stratification and cracks) and during operation. In polymer composite materials RST, namely to detect defects such as delamination and cracks using ultrasonic non-destructive testing. An analysis of the use of traditional ultrasonic non-destructive testing using a portable ultrasonic flaw detector using high-frequency transducers. It has been determined that it is sufficient to use portable ultrasonic flaw detectors to detect longitudinal cracks or stratifications, but for more reliable detection and detection of defects, completeness of control should use automated ultrasonic control systems that have greater sensitivity and scanning speed. defective zones with the possibility of constructing a qualitative image of the defective zone for further assessment of the performance of the entire structure with PCM.
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24

Kasharina, Tatiana P. "Creating new technically stable building structures from composite materials." MATEC Web of Conferences 226 (2018): 03001. http://dx.doi.org/10.1051/matecconf/201822603001.

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This article discusses the creation of sustainable “viable” structure and facility construction from composite nanomaterials that have the properties of preserving original forms and recovering when internal and external loads are applied to them. The necessary requirements for the manufacture and operation of the composite nanomaterials are also presented. Modern design and construction in a cramped urban environment, the creation of territorial planning for a “vial” sustainable complex implies a paradigm of attitude towards nature, which introduces a system of new problems that were not always considered in the past: the quality of the environment; conservation of resources; social equity; control over emissions of pollutants; health of the population, etc. All of this requires a deliberate development of public consciousness and new ideas, which is emphasized by.
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25

Chi, Xinfu, Qiyang Li, Hongxia Yan, and Sun Yize. "Robot trajectory optimization control of braiding for three-dimensional complex preforms." Journal of Engineered Fibers and Fabrics 16 (January 2021): 155892502110432. http://dx.doi.org/10.1177/15589250211043226.

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The quality of composite preform has great influence on its mechanical properties. Aiming at the problems of difficulty in robot teaching and unstable braiding angle in the process of braiding three-dimensional complex component, a control method of robot is proposed. Firstly, the mandrel is discretized to ensure that the axis of each discrete mandrel is perpendicular to the braiding point plane, and the orientation and direction of the tool center are calculated. Then, the take-up speed of the robot is calculated, so that the self-adjustment of the braiding angle can be realized in the braiding process. The experimental results show that the control method can effectively reduce the braiding angle error of variable cross-section mandrel within 2°, and can improve the quality of composite products in actual production.
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26

Pileckas, Eugenijus. "THE FORMATION OF FRONTAL ACOUSTIC SCENERY IN ECHOSCOPY." Aviation 9, no. 1 (2005): 32–33. http://dx.doi.org/10.3846/16487788.2005.9635894.

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With the wider use of composite materials in aviation, the observation of their quality during production and exploitation is becoming more topical. We are of the opinion that acoustic technologies of all‐in‐one control give us promising possibilities to watch and research the characteristics and parameters of composite materials. The acceptable way to form acoustic scenery for composite material research is discussed in this paper.
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27

Sorathia, U., C. Beck, and T. Dapp. "Residual Strength of Composites during and after Fire Exposure." Journal of Fire Sciences 11, no. 3 (1993): 255–70. http://dx.doi.org/10.1177/073490419301100305.

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The flammability characteristics of conventional and advanced composite materials have been extensively studied within the DOD. However, the structural performance of composite materials, the residual strength of composite structures, and the consequences of composite usage on ship sur vivability and damage control during and after fire have not yet been fully assessed. Residual flexural strength retained (%RSR) after exposure to 25 kW/m2 for a duration of 20 minutes (ASTM E-662) for selected conventional and advanced composite materials is presented. A methodology is presented for the assess ment of the residual strength of composite materials during fire exposure by inter-relationship of mechanical property, temperature, thickness and time.
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28

Lytkina, Daria N., Dmitriy A. Fedorishin, Polina M. Kalachikova, Anastasiya A. Plyaskina, Aleksandr R. Babeshin, and Irina A. Kurzina. "Cryo-Structured Materials Based on Polyvinyl Alcohol and Hydroxyapatite for Osteogenesis." Journal of Functional Biomaterials 12, no. 1 (2021): 18. http://dx.doi.org/10.3390/jfb12010018.

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The application of various materials in biomedical procedures has recently experienced rapid growth. One of the areas is the treatment of many of different types of bone-related diseases and disorders by using biodegradable polymer-ceramic composites. We have developed a material based on cryogel polyvinyl alcohol, mineralized with calcium phosphate. Composites were obtained by cyclic freezing-thawing, the synthesis of calcium phosphates was carried out in situ under the influence of microwave radiation with heating and stirring. The components of the composites were determined using the methods of IR-spectroscopy and scanning electron microscopy and electron probe microanalyzer, as well as their morphology and surface properties. The biological compatibility of the material was investigated in vivo for a Wistar rat. The assessment of the quality of bone formation between the cryogel-based implant and the damaged bone was carried out by computed tomography. An improvement in the consolidation of the bone defect is observed in the bone with the composite in comparison with the control bone.
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29

KROLL, Lothar, Adam CZECH, and Rainer WALLASCH. "MANUFACTURING AND QUALITY ASSURANCE OF LIGHTWEIGHT PARTS IN MASS PRODUCTION." Journal of Machine Engineering 18, no. 3 (2018): 42–56. http://dx.doi.org/10.5604/01.3001.0012.4606.

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Production-related preliminary damage and residual stresses have significant effects on the functions and the damage development in fiber composite components. For this reason, it is important, especially for the safety-relevant components, to check each item. This task becomes a challenge in the context of serial production, with its growing importance in the field of lightweight components. The demand for continuous-reinforced thermoplastic composites increases in various industrial areas. According to this, an innovative Continuous Orbital Winding (COW) process was carried out within the framework of the Federal Cluster of Excellence EXC 1075 “MERGE Technologies for Multifunctional Lightweight Structures”. COW is aiming for mass-production-suited processing of special semi-finished fiber reinforced thermoplastic materials. This resource-efficient and function-integrated manufacturing process contains a combination of thermoplastic tape-winding with automated thermoplastic tape-laying technology. The process has a modular concept, which allows implementing other special applications and technologies, e.g. integration of different sensor types and high-speed automated quality inspection. The results show how to control quality and improve the stability of the COW process for large-scale production. This was realized by developing concepts of a fully integrated quality-testing unit for automatic damage assessment of composite structures. For this purpose, the components produced in the COW method have been examined for imperfections. This was performed based on obtained results of non-destructive or destructive materials testing.
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30

Kemalov, Alim Feizrakhmanovich, Ruslan Alimovich Kemalov, Dinar Zinnurovich Valiev, and Ilmira Maratovna Abdrafikova. "Structural Dynamic Study of Roof Waterproofing Materials." Modern Applied Science 8, no. 5 (2014): 115. http://dx.doi.org/10.5539/mas.v8n5p115.

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The present research was aimed to develop the scientific applied principles and technologies of composite bituminous materials for civil engineering based on the investigation of the structures of polymer modifier and bitumen-polymer binder (BPB) on its basis with the use of nuclear magnetic resonance (NMR). The method of pulsed NMR was chosen as one of the rapid analysis methods that can be used for the analysis of bitumen-polymer systems, especially when assessing the group chemical composition of residual oil feedstock (ROF), bitumens and composite materials based on them. Using the method of pulsed NMR the regularities of the impact of modifier component composition on the changes of structural-group composition of the original and modified products were specified. Based on the results of research the optimal ratio of bitumen-polymer binder components was investigated, the manufacturability of the process for obtaining of composite bituminous materials for civil engineering with the aim of optimizing the quality of the final products was evaluated. Pulsed NMR - spectroscopy is suggested as input and output quality control of bituminous products. The regularities of redistribution of the phases with different molecular mobility and their relationship with the binder components were investigated. Rapid technique for quantifying the content of polymer in the solvent was developed.
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31

Rapoport, Yu M., and V. G. Sloushch. "Nondestructive quality control of refractories." Refractories 35, no. 1-2 (1994): 26–31. http://dx.doi.org/10.1007/bf02226839.

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32

Pang, Ping. "Crack and Condensation Problem Countermeasures of External Thermal Insulation Composite Wall." Applied Mechanics and Materials 405-408 (September 2013): 1032–35. http://dx.doi.org/10.4028/www.scientific.net/amm.405-408.1032.

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Through studying cracks and dewing problems of the energy-saving composite thermal insulation wall, we hope to attract enough attention to the construction technology and quality inspection, strengthen quality management and guarantee the engineering quality. This article has carried on the reason analysis and summarized the project construction commonly used methods from wall stiffness, indoor and outdoor temperature differences, materials and construction technology. The control problems of crack and dewing of energy-saving composite thermal insulation wall has more value in practice.
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Tao, N., X. Li, and Jin Ping Lu. "Recent Development and Application of Polymers in Concrete Technology in Singapore." Advanced Materials Research 1129 (November 2015): 102–12. http://dx.doi.org/10.4028/www.scientific.net/amr.1129.102.

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Polymer has been extensively used in construction in Singapore during the past few decades and has become a necessary component of some building materials including polymer modified cement mortar, epoxy or Polyurethane (PU) floor screed and injection materials, and fiber-reinforced plastic (FRP) materials. Compare with conventional concrete, polymer concrete composites may achieve remarkable advantages, such as high tension, high flexural strength, high ductility, ability to absorb energy, and high resistance to chemical attack, corrosion, freezing and thawing, and consequently gain more research interest for the scientific community. There are numerous possibilities for incorporation of these materials, such as latex, natural resources, fibers, nanomaterials and laminates. The presence of polymer makes it suitable for wide applications. The various categories of polymer concrete composites are widely used in Singapore’s public and private projects. To ensure and maintain the high standards of the building quality, independent testing and inspection plays a very important role. The present paper reviews recent research and development activities, and applications of polymer concrete composites in Singapore. The innovations and new approaches are reviewed. The development of the requirements and specifications for various polymer concrete composite products are described and discussed. The effect of different factors on the polymer concrete composite and material selection are also described. In addition, the paper also outlines the methods and measures used to inspect and control the quality of application.
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Zainal Abidin Sham, Nurul Wahida, and Md Supar Rohani. "Ultrasonic Bulk Waves Measurements for Defect Detection of Composite Materials." Solid State Phenomena 268 (October 2017): 401–6. http://dx.doi.org/10.4028/www.scientific.net/ssp.268.401.

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The defect detection in composite material is important for its quality control where the hidden defect such as crack, corrosion, notch, holes, void and porosity can develop. In this paper, the ultrasonic bulk wave measurements of longitudinal and shear waves are used to identify defect in the multilayered composite material. This study employs pulse echo technique and utilized angle beam transducer. The composite material model investigated in this contribution are made of 24 mm and 12 mm thick Aluminium plates with a width of 100 mm and a length of 203 mm which are separated with an approximately 1 mm thick oil layer. A simulated defect is created in the composite test material by drilling a hole with 2.5 mm diameter and 3 mm depth on the bottom surface of the third layer material. Finding indicates that the defect is located at 53.39 mm from transducer and the percentage difference of the defect location compared to the calculation method is 7%. It indicates that the proposed method can be use to detect defect in multilayered composite material within 10% accuracy compared to the calculation method.
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Berdov, G. I., P. M. Pletnev, A. M. Kiselev, S. A. Stepanova, and V. N. Nikiforova. "Nondestructive optical quality-control for ceramics." Glass and Ceramics 45, no. 8 (1988): 292–94. http://dx.doi.org/10.1007/bf00677810.

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Lin, Tianquan, Fuqiang Huang, Dongyun Wan, Hui Bi, Xiaoming Xie, and Mianheng Jiang. "Self-regulating homogenous growth of high-quality graphene on Co–Cu composite substrate for layer control." Nanoscale 5, no. 13 (2013): 5847. http://dx.doi.org/10.1039/c3nr33124e.

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Wang, Bo, Weimin Long, Mengfan Wang, et al. "Research Progress in Relation to Composite Brazing Materials with Flux." Crystals 11, no. 9 (2021): 1045. http://dx.doi.org/10.3390/cryst11091045.

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Brazing was one of the earliest material-joining methods to be invented and widely used by humans. In the past 30 years, the technology and materials employed for brazing have developed rapidly and continuously. With the rise of the international new industrial revolution, the manufacturing industry is moving towards diversification, and brazing filler metals are also evolving in the direction of eco-friendliness, compounding and diversification. In the “carbon neutral” environment of 2021, green composite brazing materials will become mainstream. In this paper, the classification and characteristics of flux-containing brazing materials are summarized, and the preparation technology, composition design and typical application of composite brazing materials such as flux-cored brazing filler metal, flux-coated brazing filler metal and powder metallurgy brazing filler metal are analyzed. The article highlights the problems encountered in the research and development of composite brazing materials and proposes future development directions, such as with low-silver and cadmium-free brazing filler metals, the creation of new powder brazing filler metal-forming technology and improvements to the quality of brazing filler metals by shape control and performance optimization, to accelerate the process of brazing automation.
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Stanislavovich, Lesovik Valery, Tolstoy Aleksandr Dmitrievich, Glagolev Evgeniy Sergeevich, et al. "Realization of the Similarity Law in the Building Material Science." Oriental Journal of Chemistry 35, no. 3 (2019): 1067–72. http://dx.doi.org/10.13005/ojc/350320.

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The need for high quality of building products and structures determines the urgency of creating new ways to control the processes of forming the internal structure of modern composite building materials. This article discusses some aspects and problems on designing high-powder composites based on the law of similarity. The results showed that the determination of the compositions of these materisls and high adhesion property to each other and a low deformation characteristic. The results demonstrated that this less deformation characteristics is due to the similarity of the thermai expansion coefficients of the concrete components.
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Luzhansky, Dmitry M. "Quality Control in Manufacturing of Electrospun Nanofiber Composites." International Nonwovens Journal os-12, no. 4 (2003): 1558925003os—12. http://dx.doi.org/10.1177/1558925003os-1200411.

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Nieciąg, Halina, Rafał Kudelski, Piotr Dudek, and Jacek Cieślik. "An Exploratory Study on the Accuracy of Parts Printed in FDM Processes from Novel Materials." Acta Mechanica et Automatica 14, no. 1 (2020): 59–68. http://dx.doi.org/10.2478/ama-2020-0009.

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AbstractThe paper describes the experiment of assessing the chosen geometric characteristics of test models with simple geometry, shaped by the FDM (fused deposition modelling) method of different materials. The influence of the material grade and the degree of infill density on the shrinkage affecting their dimensional deviations and selected surface topography parameters of printed parts was examined and compared. Three different types of materials were used to fabricate the test models, namely HDGLASS and NANOCARBON, two new fibre reinforced composites available in the market and, additionally ABS, a popular monoplastic material. An infill density ratio of 10, 50 and 90% was assumed for each material. Three specimens were made on the same printer for each infill density, which allowed to assess the repeatability of the analysed characteristics. From among many possible shapes of models, a cube was chosen as representing the simplest geometry, facilitating the measurements themselves and the interpretation of the results. New fibre-reinforced materials are more attractive in industrial applications than pure plastics (ABS) due to their mechanical properties or appearance. They are characterized by a relatively low melting point and short cooling time, after which they can return to their original geometry; however, there is a lack of detailed data on the geometric accuracy of parts made of used composite materials. The presented work was to explanatorily broaden the knowledge about the properties of composite made parts. The practical purpose of the research was that on the basis of measurements, it would be possible to indicate among the materials used that particular material whose properties and method of application would allow obtaining the best quality surface and would be the most resistant to thermal loads. An attempt was also made to explain the possible causes of the differences in the observed characteristics of the tested materials.
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Hu, Yu’an, Mei He, Kate Semple, et al. "Characterizing Mat Formation of Bamboo Fiber Composites: Horizontal Density Distribution." Materials 14, no. 5 (2021): 1198. http://dx.doi.org/10.3390/ma14051198.

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Bamboo fiber composite (BFC) is a unidirectional and continuous bamboo fiber composite manufactured by consolidation and gluing of flattened, partially separated bamboo culm strips into thick and dense panels. The composite mechanical properties are primarily influenced by panel density, its variation and uniformity. This paper characterized the horizontal density distribution (HDD) within BFC panels and its controlling factors. It revealed that HDD follows a normal distribution, with its standard deviation (SD) strongly affected by sampling specimen size, panel thickness and panel locations. SD was lowest in the thickest (40 mm) panel and largest-size (150 × 150-mm2) specimens. There was also a systematic variation along the length of the BFC due to the tapering effect of bamboo culm thickness. Density was higher along panel edges due to restraint from the mold edges during hot pressing. The manual BFC mat forming process is presented and found to effectively minimize the density variation compared to machine-formed wood composites. This study provides a basic understanding of and a quality control guide to the formation uniformity of BFC products.
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Mikhailyuk, G. M., N. V. Negutorov, and M. Yu Babkin. "Ultrasonic quality control of gate plate bases." Refractories and Industrial Ceramics 38, no. 3-4 (1997): 152–53. http://dx.doi.org/10.1007/bf02767927.

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43

Lobach, O. I., Natalya V. Lapina, L. A. Skorikova, T. V. Gayvoronskaya, E. V. Kochurova, and L. V. Gavryushova. "OPTIMIZATION OF THE ROUTINE WORK OF A DENTIST QUALITY CONTROL PHOTOCOMPOSITE RESTORATIONS OF ANTERIOR TEETH." Russian Journal of Dentistry 23, no. 1 (2019): 24–31. http://dx.doi.org/10.18821/1728-2802-2019-23-1-24-31.

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The aim of the study is to optimize the routine work of a dentist to control the quality of photocomposite restorations of the frontal group of teeth. Materials and methods. 30 people with violation of aesthetics of hard tissues of the anterior group of vital teeth (n = 166) were examined and treated. The quality of the produced restorations was assessed according to the generally accepted Ryge criteria by the classical method and using the “Intraoral optical microscope” [1] immediately after the restoration, 6 and 12 months later. Results and discussion. There were no significant differences in the stability of restorations according to the Ryge criteria when using foreign and domestic composites (p > 0.05). After 6 months, color stability, edge fit and roughness decreased in both cases (p > 0.05). When comparing the restorations immediately after the filling, 6 and 12 months after the Ryge criteria by the classical method of quality assessment and using the “Intraoral optical microscope”, statistically significant (p < 0.05) differences were found in terms of “edge adaptation”, “secondary caries”, “surface roughness”, “change in the color of the edges of the cavity”; at the same time, such criteria as “color matching” and “preservation of anatomical shape” when using both methods had minor differences. Summary. Stability in the quality of the restorations according to the criteria Ryge both photocomposite materials (Estelux NK and Filtek Z550), no significant differences were found. Therefore, the domestic material Estelux NK, taking into account its financial availability can be recommended as a composite of choice in aesthetic dental rehabilitation. To control the results of treatment with the use of restoration photocomposites, it is possible to recommend the generally recognized Ryge criteria with the use of an “Intraoral optical microscope” due to greater objectivity and simplicity in application.
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Cawley, P., A. M. Woolfrey, and R. D. Adams. "Natural frequency measurements for production quality control of fibre composites." Composites 16, no. 1 (1985): 23–27. http://dx.doi.org/10.1016/0010-4361(85)90654-8.

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45

Kutyaeva, K. M., E. G. Cheblakova, Yu A. Malinina, A. A. Shvetsov, and N. Yu Beylina. "Analytical control of silicified graphite SG-P." Industrial laboratory. Diagnostics of materials 87, no. 8 (2021): 69–75. http://dx.doi.org/10.26896/1028-6861-2021-87-8-69-75.

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An analytical scheme for the analysis of silicified graphite SG-P, a four-phase composite material consisting of silicon, carbon, silicon carbide and silicon dioxide, has been developed. The procedure can be successfully used in the quality control of raw materials and in the study of the phase composition of finished products The porosity and density of the graphite base, as well as the impurities contained in the base and silicon change the course of silicification and the properties of the finished product as well. The impurities are the main reason for the formation of delamination, swelling, cracking and light spots on the treated surfaces. It should be noted that the iron content 0.023 – 0.17 wt.% in the carbon material intended for silicification, leads to catalytic graphitization of the artificial graphite and dispersion in the silicon melt. Methods of rapid assessment of the quality of raw materials are to be used to provide quick understanding of their suitability for manufacturing final products on their base. Quality control of the silicified graphite produced at the JSC «Research Institute Graphite» is carried out by determination of the phase composition of the finished product by chemical and X-ray diffraction methods of analysis. The content of silicon carbide (not less than 45%), unbound silicon and carbon (not more than 20 and 35%, respectively) affects the corrosion resistance and thermal expansion of silicified graphite.
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Umma, Abdullah, Md Abdul Maleque, Idris Yaacob Iskandar, and Mohammad Yeakub Ali. "Effect of Ball Milling Parameters on the Synthesization of Carbon Nanotube Aluminium Nano Composite." Advanced Materials Research 626 (December 2012): 537–41. http://dx.doi.org/10.4028/www.scientific.net/amr.626.537.

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Recently, carbon nanotubes (CNTs) are attracting much interest as fibrous materials for reinforcing aluminium matrix composites due to unique properties such as high strength, elastic modulus, flexibility and high aspect ratios. However, the quality of the dispersion is the major concern factor which determines the homogeneity of the enhanced mechanical and tribological properties of the composite. This work study and characterized the nanocomposite prepared with different weight percentage of CNT in aluminium matrix using powder metallurgy route under high energy planetary ball milling operations. The ball milling was performed for three hours at different milling speeds and under controlled atmosphere. The experimental results showed homogeneous dispersion of CNTs in aluminium matrix at 300 rpm. The preliminary mixing of CNTs and aluminium powder in a tube via manual shaking could be the main contributing factor in achieving uniform dispersion of CNT in aluminium matrix after ball milling. The addition of ethanol as a process control agent reduced the agglomeration of CNTs in the matrix. Control atmosphere during milling also prevented the formation of inter metallic compounds such as aluminium carbide in the composite.
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Motovilov, K., S. Volonchuk, I. Naumenko, and A. Rezepin. "Quality and safety of dry protein and carbohydrate composite based on HACCP principles." Kormlenie sel'skohozjajstvennyh zhivotnyh i kormoproizvodstvo (Feeding of agricultural animals and feed production), no. 9 (September 1, 2020): 47–56. http://dx.doi.org/10.33920/sel-05-2009-05.

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Creating complete feed for cattle especially during the period of indoor housing is an important task of feed production. This determines the increase in milk yield and live weight, and the profitability of all production. Biotechnology of obtaining a combined feed additive in the form of a dry protein and carbohydrate composite for animals from plant raw materials and secondary raw materials allows us to solve this problem. At the same time, the quality and safety of the composite is an extremely relevant topic. In the course of research the influence of technological factors control, based on the principles of HACCP, on the quality and safety indicators of the combined feed additive has been established. The resulting product according to organoleptic indicators is a loose mixture of no more than 5–8 mm in size, without solid inclusions, foreign impurities and fumes; color is from gray to brown; smell is characteristic of the set of components included in the recipe, without musty, mold and other odors. Physical and chemical parameters are as follows: mass fraction of moisture no more than 14 %; mass fraction of sugars is at least 27–30 %; mass fraction of protein is 17,6–18,4 %, fiber content is 7,0–7,3 %. Safety indicators: total number of fungi (CFU/g) no more than 5×10[sup]4[/sup] ; total microbial number (CFU/g) no more than 5×10[sup]5[/sup] . The presence of Salmonella in 25 g is not allowed; the presence of pathogenic Escherichia in 1,0 g is not allowed. The remaining safety indicators, due to their invariability in the process of technological operations, must comply with the indicators provided for in the normative documents for raw materials. Five control critical points in the technology of proteincarbohydrate composite production that pose a threat to its quality and safety have been identified. It has been shown that the preliminary assessment and proposed corrective actions for managing hazards at all stages of the production process, which significantly affect the safety of products, can prevent the appearance of a danger of deviations from the parameters of the technological process at each stage of production.
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Wu, Edward M., and John L. Kardos. "Fiber Composite Strength Modeling With Extension to Life Prediction." Journal of Engineering Materials and Technology 128, no. 1 (2005): 41–49. http://dx.doi.org/10.1115/1.2128424.

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This paper focuses on the probability modeling of fiber composite strength, wherein the failure modes are dominated by fiber tensile failures. The probability model is the tri-modal local load-sharing model, which is the Phoenix-Harlow local load-sharing model with the filament failure model extended from one mode to three modes. This model results in increased efficiency in the determination of fiber statistical parameters and in lower cost when applied to (i) quality control in materials (fiber) manufacturing, (ii) materials (fiber) selection and comparison, (iii) accounting for the effect of size scaling in design, and (iv) qualification and certification of critical composite structures that are too large and expensive to test statistically. In addition, possible extensions to proof testing and time-dependent life prediction are discussed and preliminary data are presented.
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Fauster, Ewald, Patrick Hergan, Steffen Stelzer, et al. "HybridRTM - Quality Controlled Manufacturing of Hybrid Material Composites through Resin Transfer Moulding." Key Engineering Materials 742 (July 2017): 527–34. http://dx.doi.org/10.4028/www.scientific.net/kem.742.527.

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HybridRTM terms a publicly funded project, which aims at the development of a processing technique for manufacturing of light weight structural components from hybrid materials. In particular, components involving metal as well as fibre-reinforced polymer composite materials are manufactured in a single processing step by means of the resin transfer moulding (RTM) technique. Project activities include material development and characterization, modelling of thermally induced residual stresses, process simulation, mould development as well as model-based process control in order to ensure consistently high component quality. This paper outlines the fundamental idea of the project and summarizes the most important results gained during the first two years of project activities.
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Bezymannyi, Yu G. "Use of acoustic methods to control the quality of layered materials." Powder Metallurgy and Metal Ceramics 38, no. 5-6 (1999): 236–39. http://dx.doi.org/10.1007/bf02675768.

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