Journal articles: 'Composite applications (Computer science)'

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Karakostas, Bill, and Yannis Zorgios. "Model-Driven Engineering of Composite Service Oriented Applications." International Journal of Information Technologies and Systems Approach 4, no. 1 (January 2011): 23–37. http://dx.doi.org/10.4018/jitsa.2011010102.

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Composite applications integrate web services with other business applications and components to implement business processes. Model-driven approaches tackle the complexity of composite applications caused by domain and technology heterogeneity and integration requirements. The method and framework described in this paper generate all artefacts (workflow, data, user interfaces, etc.), required for a composite application from high level service oriented descriptions of the composite application, using model transformation and code generation techniques.

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Kawajiri, Yohei, Hiroshi Ikeda, Yuki Nagamatsu, Chihiro Masaki, Ryuji Hosokawa, and Hiroshi Shimizu. "PICN Nanocomposite as Dental CAD/CAM Block Comparable to Human Tooth in Terms of Hardness and Flexural Modulus." Materials 14, no. 5 (March 3, 2021): 1182. http://dx.doi.org/10.3390/ma14051182.

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Polymer infiltrated ceramic network (PICN) composites are an increasingly popular dental restorative material that offer mechanical biocompatibility with human enamel. This study aimed to develop a novel PICN composite as a computer-aided design and computer-aided manufacturing (CAD/CAM) block for dental applications. Several PICN composites were prepared under varying conditions via the sintering of a green body prepared from a silica-containing precursor solution, followed by resin infiltration. The flexural strength of the PICN composite block (107.8–153.7 MPa) was similar to a commercial resin-based composite, while the Vickers hardness (204.8–299.2) and flexural modulus (13.0–22.2 GPa) were similar to human enamel and dentin, respectively. The shear bond strength and surface free energy of the composite were higher than those of the commercial resin composites. Scanning electron microscopy and energy dispersive X-ray spectroscopic analysis revealed that the microstructure of the composite consisted of a nanosized silica skeleton and infiltrated resin. The PICN nanocomposite block was successfully used to fabricate a dental crown and core via the CAD/CAM milling process.

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Pawlak, Ryszard, Marcin Lebioda, Mariusz Tomczyk, Jacek Rymaszewski, Ewa Korzeniewska, and Maria Walczak. "Modelling and applications of conductive elements on textile materials." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 37, no. 5 (September 3, 2018): 1645–56. http://dx.doi.org/10.1108/compel-01-2018-0023.

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Purpose Passive conducting elements are the important parts of textronic systems. This paper aims to study a possibility of creating well-conducting and durable elements in textile materials by combining two technologies – physical vapour deposition (PVD) and laser patterning. Design/methodology/approach Thin conducting metallic layers on common fabrics do not provide satisfactory resistance to bending and stretching; therefore, selected textile composite materials have been proposed as a substrate. The conducting elements were produced in two stage process – deposition of thin metallic layer on textile composite and creating conducting elements by laser patterning. Laser ablation process was optimized using modelling in Comsol Multiphysics package. Properties of conducting structures were investigated experimentally and by modelling. Findings This paper confirms the correctness of the choice of the textile composite as a substrate for conducting elements. The results have shown that combining PVD deposition of thin metallic layer and controlled laser ablation allow creating passive elements such as resistors, inductive coils and heaters. Computer simulations conducted in the Comsol Multihysics environment enabled to determine the temperature distribution around the heaters and to describe the dynamics of its changes. The obtained results allow to shorten time of the optimization process of structures with different geometry and assumed temperature distribution. Originality/value The novelty of this research can be summarized as following: choosing of textile composites as substrates for conductive elements instead of textiles used so far in textronics; creating conductive structures on textile composites using combined technologies, PVD and laser patterning, for the first time; modelling of laser ablation process of thin metallic layer; and optimization of properties of conducting elements by computer modelling.

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Stiehl, Volker. "Composite Applications: Neue Verfahren für flexible Geschäftsprozesse." Informatik-Spektrum 30, no. 6 (October 12, 2007): 413–18. http://dx.doi.org/10.1007/s00287-007-0194-0.

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SCHLANGEN, ERIK, and ZHIWEI QIAN. "3D MODELING OF FRACTURE IN CEMENT-BASED MATERIALS." Journal of Multiscale Modelling 01, no. 02 (April 2009): 245–61. http://dx.doi.org/10.1142/s1756973709000116.

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In this article, a 3D lattice model is presented to simulate fracture in cement-based materials. In the paper, two applications are shown. The first application is modeling heterogeneous materials containing particle embedded in a matrix. A method is shown for coupling 3D information on the material structure obtained with CT-scanning to the material properties in the model. In the second application, fracture in fiber cement-based materials is modeled. Fibers are explicitly implemented as separate elements connected to the cement matrix via special interface elements. With the model, multiple cracking and ductile global behavior are simulated of the composite material. Variables in the model are the fiber dimensions and properties, the fiber volume in the composite, the bond behavior of fibers and matrix, and the cement matrix properties. These properties can be obtained by testing. Some examples of tests are given in the paper. The model can be used as a design tool for creating fiber (cement-based) composites with any desired mechanical behavior.

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Branscomb, David, David Beale, and Royall Broughton. "New Directions in Braiding." Journal of Engineered Fibers and Fabrics 8, no. 2 (June 2013): 155892501300800. http://dx.doi.org/10.1177/155892501300800202.

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It is the intent of this manuscript to provide a general treatment of braiding: past, present, and future. A history and evolution of braiding, braiding machinery, and related engineering developments is provided with emphasis on the design, manufacture, and analysis of braided fabrics and composites. Some recent developments are briefly described, including: 1. a composite braider with axial yarns which interlace with the helicals, and in which the helical yarns do not interlace with each other – a machine now under commercial development, 2. a new braided structure, called the true triaxial braid, produced by the new machine or by proper carrier loading on a conventional Maypole braider; and 3. a computer controlled take-up system using image analysis to monitor and control braid formation. Original work ongoing at Auburn University is described and involves Jacquard lace braids with open structures for use in composites, computer aided design (CAD), computer aided manufacturing (CAM), and analysis of ordinary and lace braids for composite applications. This paper is an expanded version of an invited presentation under the title “New Directions in Braiding” at a Fiber Society presentation in Bursa, Turkey, in the spring of 2010 [1].

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Burke, James V., and Tim Hoheisel. "Epi-convergent Smoothing with Applications to Convex Composite Functions." SIAM Journal on Optimization 23, no. 3 (January 2013): 1457–79. http://dx.doi.org/10.1137/120889812.

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Ramji, K., V. Ramamohana Rao, P. V. S. Ganesh Kumar, and D. Lingaraju. "Computer aided analysis of mild steel and FRP composite foundations." International Journal of Computer Aided Engineering and Technology 3, no. 2 (2011): 175. http://dx.doi.org/10.1504/ijcaet.2011.038825.

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Shivanna, Shivanna, Sameer S. Kulkarni, Samarth C, Sagar R, and Sanil K R. "Effect of Cryogenic treatment on Wear Properties of Aluminum Al356 – Zirconium Silicate Particulate Metal Matrix Composite." International Journal of Engineering and Advanced Technology 10, no. 3S (February 23, 2021): 21–24. http://dx.doi.org/10.35940/ijeat.c1006.02103s21.

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Metal matrix composite (MMC’s) are very much familiar in the field like automobile and aerospace industries owing to their excellent wear and mechanical properties . The fundamental aim of this paper is to augment cognizance amongst the researchers and to attract their consideration towards the present approach to treat with the cryogenic usage for the nonferrous metals. In this writing it is endeavor to deliver the examination findings of character of cryogenic usage on Wear Properties of Al356-ZrSiO4 Particulate Reinforced metal matrix Composites adapted by Stir Casting technique. The amount of reinforcement is changed from 0 to 12wt% in track of 3 %. The ready composites are exposed to wear testing as per ASTM standards using pin on disc machine .The hardness of the composites was found to augment with augment in reinforcement in the composite. The inference obtained discloses that as reinforcement content in the composites increment and execution of cryogenic usage to composite amended the wear resistance.

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Rasdorf, W. J. "Composite Materials Design Database and Data Retrieval System Requirements." Journal of Mechanical Design 116, no. 2 (June 1, 1994): 531–38. http://dx.doi.org/10.1115/1.2919411.

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Researchers and materials engineers require a greater understanding of the problems and solutions that emerge when integrating composite materials data with computer technology so that utilitarian composite materials databases can be developed to effectively and efficiently support analysis and design software. This paper primarily serves to analyze several of the problems facing developers of composite materials databases, evolving from the complexity of the materials themselves and from the current lack of testing and data representation standards. Without a clear understanding of the scope and nature of these problems, there is no possibility of designing concise yet comprehensive composites data models, yet we feel that such an understanding is presently lacking.

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Hijriani, Astria, and Aprillia Dewi. "Priority Determination of Application Candidate Using Ward and Peppard’s Composite Matrix Portfolio and Business Process Analysis for Customer Relationship Management (CRM)." Systemic: Information System and Informatics Journal 4, no. 1 (November 15, 2018): 30–38. http://dx.doi.org/10.29080/systemic.v4i1.322.

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By using CRM, the organization will be able to identify of what customer requires and needs, thus will improve the service. The designing of CRM the Computer Science Department using Zachman Framework is one of the approach methods that can describe a more complex and thorough system information design. Zachman Framework has not provided a method for determining the priority of the application candidates that will be designed. Even though there are several methods to determine the priority of candidates of the information system, in this research the authors use the Ward and Peppard’s composite matrix portfolio and business process analysis for priority to determine the priority of application candidates. The phase of candidates determination by using Ward and Peppard’s composite matrix and business process is the identification of information related to Computer Science Department, SWOT analysis, business process and value chain analysis, the analysis of ISO 9001:2008 quality procedure implementation related to customer, the determination of application’s candidate, and the implementation of the questionnaire mapping of application candidate. The results are in the form of mapping for each application candidate/application system into four quadrants which are provided in composite matrix for the decision-making process. The matrix consists of key operational, strategic, high potential and support. The mapping of application candidate/information system is suitable with the contribution of each information system toward the CRM in Computer Science Department, University of Lampung. The mapping on Ward and Peppard’s composite matrix is then used to separate the application candidates into two groups, the main priority of application group/information system and non-main priority of application group/information system. There are five information systems which are classified into main priority application group/information system and recommended to be developed in further research.

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Unger, Tobias, Ralph Mietzner, and Frank Leymann. "Customer-defined service level agreements for composite applications." Enterprise Information Systems 3, no. 3 (August 2009): 369–91. http://dx.doi.org/10.1080/17517570903033431.

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Nayak, Suhas Yeshwant, Srinivas Shenoy Heckadka, Anil Baby, Rashmi Samant, and K. Rajath Shenoy. "Influence of bio-filler on the mechanical properties of glass/nylon fibre reinforced epoxy based hybrid composites." Journal of Computational Methods in Sciences and Engineering 21, no. 3 (August 2, 2021): 631–39. http://dx.doi.org/10.3233/jcm-200048.

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Studies on bio-fillers addition to polymer composites is gaining momentum as it is an effective substitute for core reinforcements, leading to cost reduction in manufacturing composites and enhanced composite performance. The present study utilizes plain E-glass and nylon fibre woven mats as reinforcements with treated broiler egg shell as a filler for developing the composites. Composite laminates were fabricated with varying filler contents. Composites were characterized for tensile, flexural and impact strength. Scanning electron microscopy was carried out to observe the fibre matrix interactions. Results showed a decline in tensile and flexural properties mainly due to weak interfacial bonding while an improvement in resistance to impact loading was observed in Glass Fibre (GF), Nylon Fibre(NF) and Hybrid Composites (HC) with the addition of filler material.

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Lopes, H., S. P. Silva, and J. Machado. "Simulation of Temperature Evolution of Cork Composites During Moulding Process." International Journal of Simulation Modelling 19, no. 4 (December 5, 2020): 583–94. http://dx.doi.org/10.2507/ijsimm19-4-530.

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Cork-based composites result from a combination of cork granules with different materials – like thermosets or thermoplastics – and its manufacture involves a thermal process. In order to simulate the manufacturing process, of these types of composites, a new methodology was applied. A material composed of cork and a thermoplastic served as a case study. A model for the prediction of a cork composite mixture properties and a simulation methodology were developed for studying the variation of temperature during the moulding process of cork composites. Density, thermal conductivity, and specific heat were determined based on the formulation of the composite and the properties of cork and the agglutinant agent. Numerical analyses were carried out and compared to experimental results obtained from a moulding process. Three types of simulations, according to the model of the chosen properties were developed using finite volume and finite element methods. In general, the results from the simulations were in good agreement with experimental results.

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SHEIKH, MOHAMMED A., DAVID R. HAYHURST, SARAH C. TAYLOR, and ROY TAYLOR. "EXPERIMENTAL INVESTIGATION OF THE EFFECT OF MECHANICAL LOADING ON THERMAL TRANSPORT IN CERAMIC MATRIX COMPOSITES." Journal of Multiscale Modelling 01, no. 03n04 (July 2009): 403–31. http://dx.doi.org/10.1142/s1756973709000190.

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This paper presents the results of experimental measurements of transverse thermal diffusivity for six different industrial Ceramic Matrix Composite materials under the action of in-plane uni-axial mechanical loading. Measurements have also been taken using a one-dimensional Laser Flash technique on 8 mm diameter disc specimens without mechanical load. These results have been used to benchmark data obtained using a three-dimensional Laser Flash rig developed to operate on large mechanical test specimens whilst being loaded in a test machine. The latter facility has been used to measure the degradation of transverse thermal diffusivity with uni-axial strain. For five of the composites tested the degradation of transverse thermal diffusivity was small; and the degradation of transverse thermal diffusivity was linear with strain. One composite showed evidence of fibre pullout, and a decrease of transverse thermal diffusivity to a low value. The different behaviours observed were believed to be associated with the weave type/composite lay-up, and the selection of composite constituent materials, although insufficient data is available to make general conclusions.

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SCOTT, C. H., and T. R. JEFFERSON. "Composite convex programs." International Journal of Systems Science 22, no. 12 (December 1991): 2691–96. http://dx.doi.org/10.1080/00207729108910825.

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Sancaktar, E., M. West, and K. R. Miner. "Composite Design Methodology: Design of Composite Trails for the U.S. Army’s M198 Howitzer, A Case Study." Journal of Mechanical Design 118, no. 2 (June 1, 1996): 286–93. http://dx.doi.org/10.1115/1.2826882.

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Analysis and design of a fiber reinforced organic composite trail pair for the U.S. Army M198 Howitzer is presented as a case study in composite material design methodology. For this purpose mechanics analysis is performed using the computer program: MIC-MAC composites design and ANSYS 4.4A finite element analysis. The analyses includes composite lamination, material optimization, adhesive bonding, buckling, deflection, stress and failure analysis and validates the practicability of the proposed constant cross-section graphite/epoxy trail. The use of PC based spreadsheet MIC-MAC program, initially, allows efficient and inexpensive evaluation of several alternative designs including different geometries and materials before the finite element program is employed with the few final design choices to rule out failure in stress, deflection and buckling modes. However, superposition principles need to be used to describe the complex loading configuration as a collection of mechanically equivalent individual load modes such as midspan loaded beam, cantilever beam under torsion, in-plane loaded plate etc. in order to be able to utilize the MIC-MAC program initially. Fabrication plans are also proposed for the trail pair.

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Cañas, José, Luis Távara, Antonio Blázquez, and Alejandro Estefani. "Overview of Gc Tests Used to Evaluate Composite–Composite Adhesive Joints." Journal of Multiscale Modelling 10, no. 03 (September 2019): 1842002. http://dx.doi.org/10.1142/s1756973718420027.

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The quality of composite–composite bonded joints is a very important issue for industries, especially for the aerospace sector. A deficient joint may stop the manufacturing process and its repairing may include very high costs. Nowadays, the quality of the joint is obtained by means of interlaminar fracture toughness tests, estimating the [Formula: see text] value (Energy Release Rate used to produce crack propagation) over coupons with (theoretically) the same conditions as those included in an actual part. Usually, [Formula: see text] is obtained by means of a Double Cantilever Beam (DCB) test. Although DCB is the reference test, it may present some drawbacks when a non-symmetrical coupon is used and when the adherents stiffness is low. An alternative to DCB is the Climbing Drum Peel (CDP) test which is able to address some of the DCB drawbacks. Nevertheless, both tests need the use of a universal testing machine, then they cannot be done in situ. In the present investigation, DCB and CDP main characteristics are analyzed and a new device, called Horizontal Drum Peel (HDP), which includes the advantages of previous tests and the possibility to perform the test over an actual part is presented.

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Clérico, Paul, Xavier Mininger, Laurent Prévond, Thierry Baudin, and Anne-Laure Helbert. "Magnetic shielding of a thin Al/steel/Al composite." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 39, no. 3 (April 13, 2020): 595–609. http://dx.doi.org/10.1108/compel-09-2019-0374.

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Purpose This paper aims to investigate the efficiency of a laminated composite for shielding applications. The solution has to be efficient not only for the shield against static magnetic fields but also “for low-frequency ones, in order to be well-suited for applications with electromagnetic perturbations in the frequency range DC to 100 kHz.” Design/methodology/approach The composite constituted of a steel sheet taken in a sandwich between two aluminum (Al) sheets is produced by cold roll bonding. A good adherence between Al and steel sheets, ensuring a good mechanical resistance, is obtained with a specific process. A previous study has shown that the optimal trade-off between adherence and magnetic shielding effectiveness (SEH) is obtained with a 230 µm composite produced with an initial thickness of Al and steel sheets, respectively, of 250 and 100 µm. In this paper, the 230 µm Al/steel/Al composite is used in three applications modelized by two-dimensional numerical simulations. To obtain reasonable computation time for the simulations, a homogenization method is applied to the composite. Studied applications are a cylindrical box containing a coil, a square box under an external magnetic field and a high voltage cable. Findings In each application, SEH is calculated at low frequency and different materials (Al/steel/Al, Al, steel and copper) are compared. It is observed that, in each application, the composite presents higher SEH at equal mass, especially for frequencies between 5 and 100 kHz. Originality/value The proposed approach, from the material point of view to the system consideration, shows that the thin bimetallic composite is an innovative and promising solution for magnetic shielding in the case of applications with both DC and low-frequency perturbations.

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Walczyk, Daniel F., Jean F. Hosford, and John M. Papazian. "Using Reconfigurable Tooling and Surface Heating for Incremental Forming of Composite Aircraft Parts." Journal of Manufacturing Science and Engineering 125, no. 2 (April 15, 2003): 333–43. http://dx.doi.org/10.1115/1.1561456.

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The application of composites in the aircraft industry has increased significantly over the past few decades. With traditional composite laminate shaping, each layer is made to conform to the mold surface by hand before subsequent layers are added. This is a very labor- and time-intensive process. There is a great deal of interest in developing an automated process for forming composite parts with compound curvatures. The proposed composite forming process utilizes a computer-controlled, reconfigurable discrete element mold to incrementally form a compound curvature part shape from a flat lay-up, thereby facilitating process automation. An elastomeric interpolating layer, called an interpolator, is placed on top of the hemispherical forming ends of the die elements to prevent dimpling of the composite lay-up. The process employs vacuum to pull a single diaphragm (top), composite, and interpolator into contact with the mold surface. Through an experimental investigation, this new composites forming process with “active” tooling has been successfully demonstrated. Heating of the composite is accomplished by uncontained, forced convection using a matrix of heated air jets mounted above the composite. However, low-powered conduction is shown to be the best heating method in terms of both composite heating time and minimization of through-thickness temperature. Using vacuum to conform both the composite and the interpolator to the mold, and choosing sufficiently stiff diaphragm and interpolator materials, undimpled and wrinkle-free composite parts have been formed in an incremental fashion.

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Lambright, J. P., and C. Ume. "A Flat Composite Panel Design Advisory System Using Knowledge Based and Case Based Reasoning." Journal of Mechanical Design 118, no. 4 (December 1, 1996): 461–69. http://dx.doi.org/10.1115/1.2826913.

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A method of cooperatively using Knowledge Based and Case Based Reasoning is proposed to assist designers in the design of flat composite panel structures. A Prototype Design Advisory system is constructed of heuristic and experiential rules which are acquired from composites design experts, and published text which is implemented in the CLIPS Knowledge Based System shell. The system includes design cases of previous composites design scenarios implemented in a Case Based Reasoning System using DesignMUSE. The cases all depict design of composites applied to commercial and military aircraft. The application of heuristic rules and prior similar design cases is focused upon the early stages of the design process. It is believed that such a design advisory system can aid in preventing unforeseen mistakes during the design and manufacture of composite structures, can assist in predicting the results of candidate designs, and can ultimately reduce the design cycle time.

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Anjaneyulu, U., B. Priyadarshini, and U. Vijayalakshmi. "Preparation of Ag Doped Hydroxyapatite- Fe3O4-Chitosan Composites: In Vitro Biocompatibility Study on MG-63 Cells for Orthopedic Applications." Advanced Science Letters 24, no. 8 (August 1, 2018): 5901–6. http://dx.doi.org/10.1166/asl.2018.12217.

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Present paper deals with the development of hybrid nanocomposites which combination of Ag doped Hydroxyapatite (Ag:HAP)-Magnetite nanoparticles (Fe3O4NPs) and Chitosan. In this present investigation, we have employed sol–gel method to synthesize Ag:HAP using 5% of Ag concentrations. Furthermore, co-precipitation technique was employed to prepare Fe3O4 NPs and Ag doped HAP was mixed with it to develop hybrid composites. The planetary ball milling technique was used to incorporate the fabricated Ag:HAP-Fe3O4 composite material into the biopolymer chitosan at wt% of 50:25:25 respectively. In Vitro biocompatibility of Ag:HAP-Fe3O4 CS hybrid composites were evaluated by MTT assay using MG-63 cell lines for 24–48 h at 200–1000 μg/ml concentrations. Further, these hybrid composites were characterized by using ATR-FTIR, XRD and SEM techniques. The fabricated hybrid composite was found to be biologically compatible with MG-63 osteoblast cell lines to use in biomedical applications.

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RAIMONDO, L., and M. H. ALIABADI. "MULTISCALE PROGRESSIVE FAILURE ANALYSIS OF PLAIN-WOVEN COMPOSITE MATERIALS." Journal of Multiscale Modelling 01, no. 02 (April 2009): 263–301. http://dx.doi.org/10.1142/s1756973709000141.

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The paper presents an overview of multiscale modeling of advanced fibrous composite materials. Following the review, a nonlinear, fully three-dimensional, numerical model is proposed which is suitable for multiscale elastic and progressive failure analysis of plain-woven composite materials. The proposed model is developed for implementation into the Finite Element code ABAQUS/Explicit as a user-defined subroutine for constant stress (one integration point) solid elements. The multiscale strategy applied in this paper uses a closed-form solution approach for homogenization of the mesoscale properties of a woven composite. A mosaic model of the woven composite's Representative Volume Element (RVE) is used for deriving the micromechanical relations used for homogenization. The composite RVE model used herein is composed of UD interlacing yarns (fill and warp yarns) and matrix-rich regions. For failure and damage analysis, the following features are implemented in this work: material nonlinearity for pure in-plane shear deformation; physically-based failure criteria for matrix failure in the UD yarns; maximum stress failure criteria for failure of fibers in the UD yarns and of the pure matrix in the resin-rich regions and energy-based damage mechanics. The proposed strategy, which has been implemented and tested for a special case of an in-plane damage, has some evident advantages compared to the other approaches, especially for application to full-scale simulations, i.e., component and structural scales. A comparison of the proposed model with experimental data shows a good correlation can be achieved.

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Pritchard, David A., and Yufeng Liu. "Composite quantile‐based classifiers." Statistical Analysis and Data Mining: The ASA Data Science Journal 13, no. 4 (May 5, 2020): 337–53. http://dx.doi.org/10.1002/sam.11460.

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Budiselić, Ivan, Klemo Vladimir, and Siniša Srbljić. "Component recommendation for composite application development." Expert Systems with Applications 42, no. 22 (December 2015): 8573–87. http://dx.doi.org/10.1016/j.eswa.2015.07.012.

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Katsaros, Panagiotis, Nantia Iakovidou, and Theodoros Soldatos. "Evaluation of composite object replication schemes for dependable server applications." Information and Software Technology 48, no. 9 (September 2006): 795–806. http://dx.doi.org/10.1016/j.infsof.2005.10.004.

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Marin, Marin, Dumitru Băleanu, and Sorin Vlase. "Composite Structures with Symmetry." Symmetry 13, no. 5 (May 3, 2021): 792. http://dx.doi.org/10.3390/sym13050792.

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In recent years, the use of composite materials in structural applications has been observed. The composites have revolutionized the field of materials and allow for interesting and new developments in different engineering branches. At the same time, in all areas of engineering, there are some products or parts of products or components that contain repetitive or identical elements. Here, different types of symmetry can occur. Such systems have been studied by various researchers in the last few decades. In civil engineering, for example, most buildings, works of art, halls, etc. have, in their structure, identical parts and symmetries. This has happened since antiquity, for different reasons. First, because of their easier, faster, and cheaper design, and second, because of their easy manufacturing and (less important for engineers, but important to the beneficiaries) for aesthetic reasons. The symmetry in the field of composite materials manifests itself in two different ways, at two levels—one due to the symmetries that appear in the composition of the composite materials and that determine the properties of the materials, and second in the structures manufactured with composites. The study of the obvious importance of the existence of symmetries in the design of composite materials or composite structures of a sandwich type, for example (but also other types), and of the existence of symmetries in structures constructed also using composite materials will be highlighted within this Special Issue. With this Issue, we want to disseminate knowledge among researchers, designers, manufacturers, and users in this exciting field.

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Ataman, Osman. "Integrating Digital and Building Technologies: Towards a New Architectural Composite." International Journal of Architectural Computing 3, no. 2 (June 2005): 181–89. http://dx.doi.org/10.1260/1478077054214442.

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This paper presents an ongoing research project about the development of the materials and fabrication techniques for a fundamentally new class of architectural composite. This type of composite, which is a representative example of an even broader class of smart architectural material, has the potential to change the design and function of an architectural structure or living environment. As of today, this kind of composite does not exist. Once completed, this will be the first technology on its own. We believe this study will lay the fundamental groundwork for a new paradigm in surface engineering that may be of considerable significance in architecture, building and construction industry, and materials science.

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Bealer, Elizabeth J., Kyril Kavetsky, Sierra Dutko, Samuel Lofland, and Xiao Hu. "Protein and Polysaccharide-Based Magnetic Composite Materials for Medical Applications." International Journal of Molecular Sciences 21, no. 1 (December 26, 2019): 186. http://dx.doi.org/10.3390/ijms21010186.

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The combination of protein and polysaccharides with magnetic materials has been implemented in biomedical applications for decades. Proteins such as silk, collagen, and elastin and polysaccharides such as chitosan, cellulose, and alginate have been heavily used in composite biomaterials. The wide diversity in the structure of the materials including their primary monomer/amino acid sequences allow for tunable properties. Various types of these composites are highly regarded due to their biocompatible, thermal, and mechanical properties while retaining their biological characteristics. This review provides information on protein and polysaccharide materials combined with magnetic elements in the biomedical space showcasing the materials used, fabrication methods, and their subsequent applications in biomedical research.

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YING, Y. Q., Y. X. SUN, and M. RAO. "Bilinear state-disturbance composite observer and its application." International Journal of Systems Science 22, no. 12 (December 1991): 2489–98. http://dx.doi.org/10.1080/00207729108910809.

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Silva, Mariana M., Paulo E. Lopes, Yilong Li, Petra Pötschke, Fernando N. Ferreira, and Maria C. Paiva. "Polylactic Acid/Carbon Nanoparticle Composite Filaments for Sensing." Applied Sciences 11, no. 6 (March 15, 2021): 2580. http://dx.doi.org/10.3390/app11062580.

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Polylactic acid (PLA) is a bio-based, biodegradable polymer that presents high potential for biomedical and sensing applications. Ongoing works reported in the literature concern mainly applications based on 3D printing, while textile applications are hindered by the limited flexibility of PLA and its composite filaments. In the present work, PLA/multiwall carbon nanotube (MWCNT) composite filaments were produced with enhanced flexibility and electrical conductivity, which may be applied on a textile structure. A biodegradable plasticizer was incorporated in the nanocomposites, aiming at improving MWCNT dispersion and increasing the flexibility of the filaments. Filaments were produced with a range of compositions and their morphology was characterized as well as their thermal, thermomechanical, and electrical properties. Selected compositions were tested for sensing activity using saturated acetone vapor, demonstrating a suitable response and potential for the application in fabrics with sensing capacity.

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WEN, P. H., and M. H. ALIABADI. "MESH-FREE MICROMECHANICAL MODEL FOR WOVEN FABRIC COMPOSITE ELASTIC MODULI." Journal of Multiscale Modelling 01, no. 02 (April 2009): 303–19. http://dx.doi.org/10.1142/s175697370900013x.

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In this paper, a mesh-free micromechanical material model for evaluation of woven fabric composite elastic moduli is developed. A new and realistic material model based on repeated unit approach with smooth fiber modes is presented. The mesh-free formulation is achieved through consideration of variation of potential energy in a similar manner to the finite element method. Radial basis functions are used as the approximation function in the mesh-free method developed. As no formal element mesh is used to model the matrix, fill and wrap in this approach, the simplicity in meshing is particularly notable. The results obtained for elastic moduli of woven fabric composites are shown to be accurate and in agreement to other available solutions.

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Smith, P., and S. Torquato. "Computer simulation results for the two-point probability function of composite media." Journal of Computational Physics 76, no. 1 (May 1988): 176–91. http://dx.doi.org/10.1016/0021-9991(88)90136-2.

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Zhu, Lvtao, Mahfuz Bin Rahman, and Zhenxing Wang. "Effect of Structural Differences on the Mechanical Properties of 3D Integrated Woven Spacer Sandwich Composites." Materials 14, no. 15 (July 31, 2021): 4284. http://dx.doi.org/10.3390/ma14154284.

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Three-dimensional integrated woven spacer sandwich composites have been widely used as industrial textiles for many applications due to their superior physical and mechanical properties. In this research, 3D integrated woven spacer sandwich composites of five different specifications were produced, and the mechanical properties and performance were investigated under different load conditions. XR-CT (X-ray computed tomography) images were employed to visualize the microstructural details and analyze the fracture morphologies of fractured specimens under different load conditions. In addition, the effects of warp and weft direction, face sheet thickness, and core pile height on the mechanical properties and performance of the composite materials were analyzed. This investigation can provide significant guidance to help determine the structure of composite materials and design new products according to the required mechanical properties.

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Jiang, Yuan, Ke Lu, Chenglong Gong, and Hao Liang. "Robust composite nonlinear feedback control for uncertain robot manipulators." International Journal of Advanced Robotic Systems 17, no. 2 (March 1, 2020): 172988142091480. http://dx.doi.org/10.1177/1729881420914805.

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On the basis of the classical computed torque control method, a new composite nonlinear feedback design method for robot manipulators with uncertainty is presented. The resulting controller consists of the composite nonlinear feedback control and robust control. The core is to use the robust control for online approximation of the system’s uncertainty as a compensation term for the composite nonlinear feedback controller. The design method of the new controller is given, and the convergence of the closed-loop system is proved. The simulation results show that the proposed scheme can make the uncertain robot system have strong robustness and anti-interference ability.

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Padmanbham, K. C. Anantha, Mruthenjaya M, and Darshan B.G. "Effect of Reinforcement, Load and sliding distance on Al-4.5%wt Copper Matrix Hybrid Composites." International Journal of Engineering and Advanced Technology 10, no. 3S (February 23, 2021): 1–6. http://dx.doi.org/10.35940/ijeat.c1001.02103s21.

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Aluminum is prospectively a significant material for tribological appliances for the reason that of its less density and superior thermal conductivity. However, aluminium by itself displays deprived tribological properties. Hence, the investigation of the tribological performance of aluminium based composite materials is flattering increasingly significant. Hence in the present research tribological behavior of Al-4.5%wt copper reinforced with varying percentage of zircon sand (2% -8% in increments of 2 %) with and without 2%wt graphite of hybrid composite samples prepared by friction stir casting technique.. To know the allocation of particles and bonding flanked by reinforcement with matrix, microstructure of the composites and base alloy were premeditated by means of “Optical and Scanning Electron Microscopy”. The wear loss was computed employing pin on disc apparatus at room temp underneath dry sliding state. The investigation reveals that the wear rate of Al-4.5%wtCu alloy effected by composition, load and speed..

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Tennison, S. R., K. Arnott, and H. Richter. "Carbon ceramic composite membranes for catalytic membrane reactor applications." Kinetics and Catalysis 48, no. 6 (November 2007): 864–76. http://dx.doi.org/10.1134/s002315840706016x.

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COCKS, A. C. F., and F. A. LECKIE. "PERFORMANCE DIAGRAMS FOR CERAMIC MATRIX COMPOSITE COMPONENTS SUBJECTED TO CYCLIC THERMO-MECHANICAL LOADING." Journal of Multiscale Modelling 01, no. 03n04 (July 2009): 433–50. http://dx.doi.org/10.1142/s1756973709000165.

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Ceramic matrix composites (CMCs) are candidates for pressurized tubes which operate under conditions of severe cyclic thermal loading. Simple models describing the properties of CMCs are used to estimate the behaviour of a pressurized tube subjected to cyclic thermal loading and to establish shakedown and failure conditions. Analytical procedures are described which evaluate the component response in the cyclic state. The approach is illustrated by analysing the classical Bree problem assuming material properties which are representative of a SiC/SiC composite. Performance diagrams are presented which identify safe operating conditions and the extent of damage in the component.

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ALDAJAH, S., J. CHATTERJEE, M. ALRAWADEH, A. KOSURI, and Y. HAIK. "ALIGNMENT OF CARBON NANOTUBES USING MAGNETIC NANOPARTICLES." International Journal of Nanoscience 08, no. 03 (June 2009): 251–59. http://dx.doi.org/10.1142/s0219581x09006067.

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Carbon nanotubes are driving scientific research nowadays. This field has several important directions in basic research, including chemistry, electronic transport, mechanical, and field emission properties. The most eye-catching features of carbon nanotubes are their electronic, mechanical, optical, and chemical characteristics, which open a way to future applications. One of the most important applications of nanotubes based on their properties will be as reinforcements in composite materials. One of the biggest concerns to nanotube industry is the alignment problem which has limited the usage and utilizations of carbon nanotubes in composites. The ability to impose a preferred alignment of carbon nanotubes in a composite will increase the effectiveness of utilizing nanotubes in composite applications. The alignment of nanotubes will maximize the interfacial bonding across the nanotube matrix interface. In this research, we developed a methodology and a process to align nanotubes in polymer nanocomposites by means of a magnetic field. By doing so, we will get a very strong nanocomposite that can be used in the composites industry. The proposed mechanism aims at aligning the carbon nanotubes by means of nanomagnetic particles that are adsorbed on the nanotube surfaces and by applying an external magnetic field. SEM analysis have shown that nanomagnetic particles with the assistance of the magnetic field were able to align the carbon nanotubes in the desired direction.

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NANDA, MANGALA GOWRI, and NEERAN KARNIK. "SYNCHRONIZATION ANALYSIS FOR DECENTRALIZING COMPOSITE WEB SERVICES." International Journal of Cooperative Information Systems 13, no. 01 (March 2004): 91–119. http://dx.doi.org/10.1142/s0218843004000900.

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Web Services are emerging as the standard mechanism for making information and software available programmatically via the Internet, and as building blocks for applications. A composite web service may be built using multiple component web services. Once its specification has been developed, the composite service may be orchestrated either using a centralized engine or in a decentralized fashion. Decentralized orchestration brings performance benefits, and improves scalability and concurrency. Dynamic binding coupled with decentralized orchestration adds high availability and fault tolerance to the system. However in such systems, the coordination between components needs to be carefully designed to ensure correct execution of the composite and to limit the synchronization overheads. In this paper, we categorize different forms of concurrency and provide an algorithm to identify these forms in a composite service specification. We explore different mechanisms for transferring data between the components in the presence of different forms of concurrency. Then we experimentally evaluate the efficiency and scalability of each mechanism. We also analyze the coordination requirements of a decentralized orchestration in the presence of dynamic binding and fault propagation.

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Vlădoiu, Monica, and Zoran Constantinescu. "Development Journey of QADPZ - A Desktop Grid Computing Platform." International Journal of Computers Communications & Control 4, no. 1 (March 1, 2009): 82. http://dx.doi.org/10.15837/ijccc.2009.1.2416.

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In this paper we present QADPZ, an open source system for desktop grid computing, which enables users of a local network or Internet to share resources. QADPZ allows a centralized management and use of the computational resources of idle computers from a network of desktop computers. QADPZ users can submit compute-intensive applications to the system, which are then automatically scheduled for execution. The scheduling is performed according to the hardware and software requirements of the application. Users can later monitor and control the execution of the applications. Each application consists of one or more tasks. Applications can be independent, when the composing tasks do not require any interaction, or parallel, when the tasks communicate with each other during the computation. The paper describes both QADPZ functionality and the process of design and implementation, with focus on requirements, architecture, user interface and security. Some future work ideas are also presented.

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Kanaka Durga, Ikkurthi, S. Srinivasa Rao, Jin-Woo Ahn, Tae-Yong Park, Bak Jin-Soo, Cho-In Ho, K. Prabakar, and Hee-Je Kim. "Dice-Like Nanostructure of a CuS@PbS Composite for High-Performance Supercapacitor Electrode Applications." Energies 11, no. 7 (June 21, 2018): 1624. http://dx.doi.org/10.3390/en11071624.

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Mohammadi, Ashkan, and M. Ebrahim Sarabi. "Twice Epi-Differentiability of Extended-Real-Valued Functions with Applications in Composite Optimization." SIAM Journal on Optimization 30, no. 3 (January 2020): 2379–409. http://dx.doi.org/10.1137/19m1300066.

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Roelse, Peter. "The design of composite permutations with applications to DES-like S-boxes." Designs, Codes and Cryptography 42, no. 1 (December 1, 2006): 21–42. http://dx.doi.org/10.1007/s10623-006-9012-y.

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Paganini, Alina, Thomas Attin, and Tobias T. Tauböck. "Margin Integrity of Bulk-Fill Composite Restorations in Primary Teeth." Materials 13, no. 17 (August 28, 2020): 3802. http://dx.doi.org/10.3390/ma13173802.

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This in vitro study examined the margin integrity of sculptable and flowable bulk-fill resin composites in Class II cavities of primary molars. Standardized Class II cavities were prepared in human primary molars and restored with the following resin composite materials after application of a universal adhesive: a sculptable bulk-fill composite (Tetric EvoCeram Bulk Fill (TEC) or Admira Fusion x-tra (AFX)), a flowable bulk-fill composite (Venus Bulk Fill (VBF) or SDR), or a conventional composite (Filtek Supreme XTE (FS)). The bulk-fill materials were applied in 4 mm layers, while the conventional composite was applied in either 2 mm (FS2, positive control) or 4 mm layers (FS4, negative control). The specimens were exposed to thermo-mechanical loading (TML) in a computer-controlled masticator. A quantitative margin analysis was performed both before and after TML using scanning electron microscopy, and the percentage of continuous margins (margin integrity) was statistically analyzed (α = 0.05). All composites showed a significant decline in margin integrity after TML. AFX exhibited the significantly highest margin integrity of all materials after TML (97.5 ± 2.3%), followed by FS2 (79.2 ± 10.8%), TEC (73.0 ± 9.1%), and FS4 (71.3 ± 14.6%). SDR (43.6 ± 22.3%) and VBF (25.0 ± 8.5%) revealed the lowest margin integrity. In conclusion, the tested sculptable bulk-fill materials show similar or better margin integrity in primary molars than the conventional resin composite placed in 2 mm increments.

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Hariprasad, T., K. Varatharajan, and S. Ravi. "Investigation of Microstructural and Mechanical Properties of Al 5083-ZrSiO4-Gr Hybrid Composite." International Journal of Nanoscience 17, no. 04 (July 8, 2018): 1760029. http://dx.doi.org/10.1142/s0219581x17600298.

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In this present work, an attempt is made to compare the microstructural, mechanical and tribological properties of Al 5083-5% and 10% Gr, Al 5083-5% and 10% ZrSiO4 composite with Al 5083-5, 10% Gr-5 and 10% ZrSiO4 hybrid composite. The samples were prepared by using the stir casting technique, and the characterizations of composites and hybrid composite were observed by using SEM, EDAX and X-ray diffraction (XRD). The mechanical properties such as hardness, tensile, compressive strength of hybrid composite were found to be better than those of composites. The wear test was carried out by using a pin-on-disc wear tribometer by varying parameters like normal load (5, 10[Formula: see text]N), sliding speed (1, 1.5, 2[Formula: see text]m/s) with constant sliding distance (2000[Formula: see text]m). The worn surface of the samples is examined by using SEM, and the wear properties of the hybrid composite are found to exhibit superior wear resistance properties than composites.

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Liu, Tian, Jiongzhi Zheng, Zhenting Wang, Zhengdong Huang, and Yongfu Chen. "Composite clustering normal distribution transform algorithm." International Journal of Advanced Robotic Systems 17, no. 3 (May 1, 2020): 172988142091214. http://dx.doi.org/10.1177/1729881420912142.

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Scan registration is a fundamental step for the simultaneous localization and mapping of mobile robot. The accuracy of scan registration is critical for the quality of mapping and the accuracy of robot navigation. During all of the scan registration methods, normal distribution transform is an efficient and wild-using one. But normal distribution transform will lead to the unreasonable interruption when splitting the grid and can’t express the points’ local geometric feature by prefixed grid. In this article, we propose a novel method, composite clustering normal distribution transform, which comprises the density-based clustering and k-means clustering to aggregate the points with similar local distributing feature. It takes singular value decomposition to judge the suitable degree of one cluster for further division. Meanwhile, to avoid the radiating phenomenon of LIDAR in measuring the points’ distance, we propose a method based on trigonometric to measure the internal distance. The clustering method in composite clustering normal distribution transform could ensure the expression of LIDAR’s local distribution and matching accuracy. The experimental result demonstrates that our method is more accurate and more stable than the normal distribution transform and iterative closest point methods.

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Maamar, Zakaria. "On coordinating personalized composite web services." Information and Software Technology 48, no. 7 (July 2006): 540–48. http://dx.doi.org/10.1016/j.infsof.2005.05.011.

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Li, Jun, Shunyi Zhang, Cuilian Li, and Junrong Yan. "Composite lightweight traffic classification system for network management." International Journal of Network Management 20, no. 2 (February 22, 2010): 85–105. http://dx.doi.org/10.1002/nem.735.

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Long, Xi, W. Louis Cleveland, and Y. Lawrence Yao. "Multiclass detection of cells in multicontrast composite images." Computers in Biology and Medicine 40, no. 2 (February 2010): 168–78. http://dx.doi.org/10.1016/j.compbiomed.2009.11.013.

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Journal articles on the topic 'Composite applications (Computer science)'

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