Готові списки джерел за темами / Biaxial media

Добірка наукової літератури з теми "Biaxial media"

Автор: Grafiati

Опубліковано: 10 грудня 2022

Оновлено: 28 січня 2023

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Статті в журналах з теми "Biaxial media"

New, G. H. C. "Biaxial media revisited." European Journal of Physics 34, no. 5 (July 31, 2013): 1263–76. http://dx.doi.org/10.1088/0143-0807/34/5/1263.

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Weiglhofer, Werner S., and Akhlesh Lakhtakia. "On Electromagnetic Waves in Biaxial Bianisotropic Media." Electromagnetics 19, no. 4 (July 1999): 351–62. http://dx.doi.org/10.1080/02726349908908652.

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Wang, Yanyang, Peng Shi, Hong Xin, and Lei Wu. "Complex ray tracing in biaxial anisotropic absorbing media." Journal of Optics A: Pure and Applied Optics 10, no. 7 (June 2, 2008): 075009. http://dx.doi.org/10.1088/1464-4258/10/7/075009.

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Mitchell, A., J. T. Aberle, D. M. Kokotoff, and M. W. Austin. "An anisotropic PML for use with biaxial media." IEEE Transactions on Microwave Theory and Techniques 47, no. 3 (March 1999): 374–77. http://dx.doi.org/10.1109/22.750246.

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Damaskos, N. J., A. L. Maffett, and P. L. E. Uslenghi. "Reflection and transmission for gyroelectromagnetic biaxial layered media." Journal of the Optical Society of America A 2, no. 3 (March 1, 1985): 454. http://dx.doi.org/10.1364/josaa.2.000454.

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Moskvin, D. N., V. P. Romanov, and A. Yu Val’kov. "Green’s function of the electromagnetic field in biaxial media." Physical Review E 48, no. 2 (August 1, 1993): 1436–46. http://dx.doi.org/10.1103/physreve.48.1436.

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Lakhtakia, Akhlesh. "On the Motohiro-Taga interface for biaxial columnar media." Optical Engineering 37, no. 12 (December 1, 1998): 3268. http://dx.doi.org/10.1117/1.602001.

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Hodgkinson, Ian, Qi Hong Wu, and Simon Collett. "Dispersion equations for vacuum-deposited tilted-columnar biaxial media." Applied Optics 40, no. 4 (February 1, 2001): 452. http://dx.doi.org/10.1364/ao.40.000452.

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Pandit, Aditya, Xiao Lu, Chong Wang, and Ghassan S. Kassab. "Biaxial elastic material properties of porcine coronary media and adventitia." American Journal of Physiology-Heart and Circulatory Physiology 288, no. 6 (June 2005): H2581—H2587. http://dx.doi.org/10.1152/ajpheart.00648.2004.

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Анотація:

The importance of mechanical stresses and strains has become well recognized in vascular physiology and pathology. To compute the stress and strain on the various components of the vessel wall, we must know the constitutive equations for the different layers of the vessel wall. The objective of the present study is to determine the constitutive equation of the coronary artery treated as a two-layer composite: intima-media and adventitial layers. Twelve hearts were obtained from a local slaughterhouse, and the right coronary artery and left anterior descending artery were dissected free from the myocardium. The vessel wall was initially mechanically tested biaxially (inflation and axial extension) as a whole (intact wall) and subsequently as intima-media or adventitial layer. A Fung-type exponential strain energy function was used to curve fit the experimental data for the intact wall and individual layers for the right coronary artery and left anterior descending artery. Two methods were used for the determination of material constants, including the Marquardt-Levenberg nonlinear least squares method and the genetic algorithm method. Our results show that there were no statistically significant differences in the material constants obtained from the two methods and that either set of elastic constants results in good fit of the data. Furthermore, at an in vivo value of axial stretch ratio, we find that the stiffness is as follows: intima-media > intact > adventitia. These results underscore the composite nature of coronary arteries with different material properties in each layer. The present results are necessary for analysis of coronary artery mechanics and to provide a fundamental understanding of vessel physiology.

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Cojocaru, E. "Dyakonov hybrid surface waves at the isotropic–biaxial media interface." Journal of the Optical Society of America A 32, no. 5 (April 16, 2015): 782. http://dx.doi.org/10.1364/josaa.32.000782.

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Дисертації з теми "Biaxial media"

Macêdo, Jorge Andrey da Silva. "Formalismo FDTD para a modelagem de meios dispersivos apresentando anisotropia biaxial." Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/18/18155/tde-15102008-135510/.

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Este trabalho apresenta um novo formalismo bi-dimensional em diferenças finitas no domínio do tempo (2D-FDTD) para a simulação de estruturas baseadas em metamateriais. A natureza dispersiva destes meios é levada em consideração de forma precisa pela inclusão dos modelos materiais de Drude para os tensores permissividade elétrica e permeabilidade magnética. Todos os elementos dos tensores são considerados neste formalismo, o que o torna muito atraente para a modelagem de uma classe geral de estruturas eletromagnéticas. Dois efeitos de enorme impacto são analisados em detalhes, sendo eles a cobertura de invisibilidade e o rotacionamento de campo. Ambos os efeitos requerem a utilização de técnicas de transformação de coordenadas a qual deve ser aplicada apenas na região onde os campos eletromagnéticos precisam ser manipulados, tirando vantagem da invariância das equações de Maxwell quanto a estas operações. Esta técnica redefine localmente os parâmetros de permissividade e permeabilidade do meio transformado. O formalismo implementado apresentou grande estabilidade e precisão, uma conseqüência direta da natureza dispersiva dos modelos materiais de Drude, o que o caracteriza como uma boa contribuição para uma completa compreensão da fenomenologia por trás destes efeitos fascinantes. Os resultados numéricos apresentaram boa concordância com os disponíveis na literatura. Foi também observado que ambas estruturas são muito sensíveis a variações de freqüência do campo de excitação.
This work introduces an extended two-dimensional finite difference time domain method (2D-FDTD) for the simulation of metamaterial based structures. The dispersive nature of these media is accurately taken into account through the inclusion of the Drude material models for the permittivity and permeability tensors. All tensor elements are properly accounted for, making the formalism quite attractive for the modeling of a general class of electromagnetic structures. Two striking effects are investigated with the proposed model, namely, the invisibility cloaking and the field rotation effects. Both effects require the utilization of a coordinate transformation technique which must be applied only in the region where the electromagnetic field needs to be manipulated, taking advantage of the invariance of Maxwell\'s equations with respect to these operations. This technique locally redefines the permittivity and permeability parameters of the transformed media. The implemented formalism has proved to be quite stable and accurate, a direct consequence of the dispersive nature of the Drude material model, which characterizes it as a good contribution to fully understand the phenomenology behind these fascinating effects. The numerical results are in good agreement with those available in the literature. It was also verified that both structures are very sensitive to frequency variations of the excitation field.

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Nguyen, Thai Binh. "Étude expérimentale et numérique de la localisation de la déformation dans un milieu granulaire." Thesis, Rennes 1, 2017. http://www.theses.fr/2017REN1S121/document.

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Анотація:

Les milieux granulaires sont très étudiés depuis des décennies mais la description de l'ensemble des comportements observés de ces matériaux reste une grande question ouverte. Lorsqu'ils sont soumis à une contrainte suffisamment importante, une caractéristique est de présenter de la localisation de la déformation. L'objectif du travail présenté dans ce mémoire est d'étudier expérimentalement et numériquement la déformation d'un milieu granulaire et de caractériser des comportements observés lors d'un text biaxial. La première partie est consacrée à la réalisation des tests biaxiaux en déformation plane. Pour pouvoir visualiser de très petites déformations, nous utilisons une méthode interférométrique basée sur la diffusion multiple de la lumière. La deuxième partie est dédiée à la modélisation numérique d'un test biaxial en 2D dans des conditions similaires à celles de l'expérience par la méthode des éléments discrets. Enfin, dans la dernière partie, des outils développés pour l'analyse d'images utilisés pour étudier aussi bien les expériences que les simulations numériques sont abordés. L'étude du champ plastique moyen dans les expériences montre que la localisation de la déformation est un processus progressif initié par une bifurcation qui correspond à l'apparition d'une direction bien définie. Cette direction est en accord avec l'angle de Mohr-Coulomb et son apparition a lieu avant la rupture du matériau. L'étude des fluctuations de la plasticité dans les expériences et les simulations numériques semble mettre en évidence une croissance d'une longueur caractéristique
Granular materials have been studied for decades, but the description of the behaviors observed of these materials is still an open question. They display localization of deformation when submitted to a large enough stress. The objective of this work is to study experimentally and numerically the deformation of a granular material and to characterize observed behaviors in a biaxial text. The first part is devoted to the realization of plane strain biaxial tests. In order to visualize very small deformations, we use an interferometric method based on the multiple light scattering. The second part is devoted to the numerical modeling of a 2D biaxial test under conditions similar to those of the experiment by the discrete element method. Finally, in the last part, tools developed for the analysis of images used to study as well the experiences as the numerical simulations are approached. The study of the average plastic field in the experiments shows that the localization of the deformation is a progressive process initiated by a bifurcation which corresponds to the appearance of a well defined direction. This direction is in agreement with the angle of Mohr-Coulomb and its appearance takes place before the failure of the material. The study of the fluctuations of the plasticity in the experiments and the numerical simulations seems to show an increase of a characteristic length

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Pettis, Gregory Francis. "Hertzian dipoles and microstrip circuits on arbitrarily oriented biaxially anisotropic media." Related electronic resource: Current Research at SU : database of SU dissertations, recent titles available full text, 2008. http://wwwlib.umi.com/cr/syr/main.

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Saint-Cyr, Baptiste. "Modélisation des matériaux granulaires cohésifs à particules non convexes : Application à la compaction des poudres d'UO2." Phd thesis, Université Montpellier II - Sciences et Techniques du Languedoc, 2011. http://tel.archives-ouvertes.fr/tel-00660146.

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Анотація:

On s'intéresse à la modélisation des matériaux granulaires composé d'agrégats non convexes et cohésifs en vue d'application à la rhéologie des poudres d'UO2 . L'inﬂuence du degré de non-convexité des particules est analysé en termes de grandeurs macroscopiques (frottement interne et cohésion de Coulomb) et de paramètres micro-mécaniques tels que l'anisotropie de la texture et la transmission des efforts. Il apparaît en particulier que la compacité évolue d'une manière complexe avec la non-convexité et que la résistance au cisaillement augmente mais sature sous l'effet d'imbrication entre agrégats. Des modèles simples sont introduits pour décrire ces comportements en termes de paramètres micro-mécaniques. De même, des études systématiques par cisaillement, compaction uniaxiale et compression simple montrent que la cohésion interne augmente avec la non-convexité mais est fortement contrôlée par les conditions aux limites et l'apparition de bandes de cisaillement ou de concentrations de contraintes.

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Книги з теми "Biaxial media"

Deakin, William Benjamin. The linear and second harmonic properties in and at the boundaries of uniaxial and biaxial media. Manchester: University of Manchester, 1996.

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Частини книг з теми "Biaxial media"

Pazynin, Leonid, Seil Sautbekov, and Yuriy Sirenko. "Dyadic Green’s Function for Biaxial Anisotropic Media." In Electromagnetic Waves in Complex Systems, 91–102. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-31631-4_2.

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Mackay, Tom G., and Werner S. Weiglhofer. "A Review of Homogenization Studies for Biaxial Bianisotropic Materials." In Advances in Electromagnetics of Complex Media and Metamaterials, 211–28. Dordrecht: Springer Netherlands, 2002. http://dx.doi.org/10.1007/978-94-007-1067-2_12.

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Fikioris, George. "An Integral Arising in the Theory of Biaxially Anisotropic Media." In Mellin-Transform Method for Integral Evaluation, 35–38. Cham: Springer International Publishing, 2007. http://dx.doi.org/10.1007/978-3-031-01697-4_7.

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"Choice of Eigenwave Bases for Isotropic, Uniaxial, and Biaxial Media." In Modeling and Optimization of LCD Optical Performance, 331–65. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2015. http://dx.doi.org/10.1002/9781118706749.ch9.

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Тези доповідей конференцій з теми "Biaxial media"

Pettis, Gregory F., Clifford M. Krowne, and Jay K. Lee. "Microstrip transmission lines on arbitrarily oriented biaxial media." In 2009 Asia Pacific Microwave Conference - (APMC 2009). IEEE, 2009. http://dx.doi.org/10.1109/apmc.2009.5384287.

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Massman, Jeffrey P., and Michael J. Havrilla. "Non-Aligned Biaxial Media Theoretical Scattering Parameter Extraction." In 2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (AP-S/USNC-URSI). IEEE, 2022. http://dx.doi.org/10.1109/ap-s/usnc-ursi47032.2022.9887157.

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Matos, S. A., C. R. Paiva, and A. M. Barbosa. "Conical refraction in generalized biaxial media: A geometric algebra approach." In IEEE EUROCON 2011 - International Conference on Computer as a Tool. IEEE, 2011. http://dx.doi.org/10.1109/eurocon.2011.5929176.

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Kang, Dong Hun, Tae Sup Yun, and T. Matthew Evans. "Evolution of Pore Orientation in Granular Media under Biaxial Compression." In Geo-Congress 2014. Reston, VA: American Society of Civil Engineers, 2014. http://dx.doi.org/10.1061/9780784413272.274.

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Tchernyatin, Alexander Yu. "Analysis and application of Bragg acousto-optic diffraction in biaxial media." In Congress on Optics and Optoelectronics, edited by Antoni Sliwinski, Rainer Reibold, and Vitaly B. Voloshinov. SPIE, 2005. http://dx.doi.org/10.1117/12.622291.

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Zhang, Lian-Wei, and Jian-Min Zhang. "Development of a biaxial compression test apparatus for granular materials." In POWDERS AND GRAINS 2013: Proceedings of the 7th International Conference on Micromechanics of Granular Media. AIP, 2013. http://dx.doi.org/10.1063/1.4811972.

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Massman, J., and M. Havrilla. "Analysis of General Plane Wave Propagation in Biaxial Media Using the kDB System." In 2022 Sixteenth International Congress on Artificial Materials for Novel Wave Phenomena (Metamaterials). IEEE, 2022. http://dx.doi.org/10.1109/metamaterials54993.2022.9920911.

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Shaverdi, Homayoun, Mohd Raihan Taha, and Farzin Kalantary. "Effect of fabric on the strength of granular materials in biaxial compression." In POWDERS AND GRAINS 2013: Proceedings of the 7th International Conference on Micromechanics of Granular Media. AIP, 2013. http://dx.doi.org/10.1063/1.4812006.

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Boyd, Richard E., Jerry W. Kuper, and Donald J. Harter. "Lamp Pump Chamber Optimization: Modeling and Experimental Verification of Absorption in Biaxial, Trichroic Media." In Advanced Solid State Lasers. Washington, D.C.: OSA, 1989. http://dx.doi.org/10.1364/assl.1989.kk2.

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Kabir, M. A., C. F. Higgs, and M. R. Lovell. "Contact Force Simulation of Granular Media Using Explicit Finite Element Method." In STLE/ASME 2008 International Joint Tribology Conference. ASMEDC, 2008. http://dx.doi.org/10.1115/ijtc2008-71299.

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Анотація:

Granular flow behavior is of fundamental interest to the engineering and scientific community because of the prevalence of these flows in the pharmaceutical, agricultural, food service, and powder manufacturing industries. When granular media come under external load, inter-particle forces in the granular media form an inhomogeneous distribution. In this study, a simulation of the contact forces in granular media was carried out using an explicit finite element method on a biaxial cell of approximately 2500 particles. Some of the key results included the capturing of normal force and tangential force distributions within a granular shear cell.

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