Relevant bibliographies by topics / Anisotropic medium

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Anisotropic medium'

Author: Grafiati
Published: 4 June 2021
Last updated: 16 February 2022

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Journal articles on the topic "Anisotropic medium"

1

Sharma, M. D. "Rayleigh wave at the surface of a general anisotropic poroelastic medium: derivation of real secular equation." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 474, no. 2211 (March 2018): 20170589. http://dx.doi.org/10.1098/rspa.2017.0589.

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A secular equation governs the propagation of Rayleigh wave at the surface of an anisotropic poroelastic medium. In the case of anisotropy with symmetry, this equation is obtained as a real irrational equation. But, in the absence of anisotropic symmetries, this secular equation is obtained as a complex irrational equation. True surface waves in non-dissipative materials decay only with depth. That means, propagation of Rayleigh wave in anisotropic poroelastic solid should be represented by a real phase velocity. In this study, the determinantal system leading to the complex secular equation is manipulated to obtain a transformed equation. Even for arbitrary (triclinic) anisotropy, this transformed equation remains real for the propagation of true surface waves. Such a real secular equation is obtained with the option of boundary pores being opened or sealed. A numerical example is solved to study the existence and propagation of Rayleigh waves in porous media for the top three (i.e. triclinic, monoclinic and orthorhombic) anisotropies.
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Tleukenov, S. K., M. K. Zhukenov, and N. A. Ispulov. "Propagation of electromagnetic waves in anisotropic magnetoelectric medium." Bulletin of the Karaganda University. "Physics" Series 94, no. 2 (June 28, 2019): 29–34. http://dx.doi.org/10.31489/2019ph2/29-34.

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Liu, Weiqiang, Pinrong Lin, Qingtian Lü, Rujun Chen, Hongzhu Cai, and Jianhua Li. "Time Domain and Frequency Domain Induced Polarization Modeling for Three-dimensional Anisotropic Medium." Journal of Environmental and Engineering Geophysics 22, no. 4 (December 2017): 435–39. http://dx.doi.org/10.2113/jeeg22.4.435.

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Time domain induced polarization (TDIP) and frequency domain induced polarization (FDIP) synthetic models, incorporating three-dimensional (3D) anisotropic medium, were tested. In TDIP modeling, both resistivity and chargeability of the medium were anisotropic, and the apparent chargeability values were calculated by carrying out two resistivity forward calculations using resistivity with and without an IP effect. We analyzed the TDIP response of a 3D isotropic cube model embedded in the anisotropic subsurface half-space. In FDIP modeling, the complex resistivity of the medium at various frequencies was anisotropic. The complex resistivity was determined by a Cole-Cole model with anisotropic model parameters. We then analyzed the FDIP response of a 3D anisotropic cube model embedded in an isotropic subsurface half-space. Both of the TDIP and FDIP simulation results suggest that IP responses acquired in two orthogonal directions on the surface are different when the same arrays are used and acquisition in orthogonal directions helps resolve the presence of anisotropy. The anisotropy should be taken into account in practice for TDIP and FDIP exploration.
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Zhu, Tieyuan. "Numerical simulation of seismic wave propagation in viscoelastic-anisotropic media using frequency-independent Q wave equation." GEOPHYSICS 82, no. 4 (July 1, 2017): WA1—WA10. http://dx.doi.org/10.1190/geo2016-0635.1.

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Seismic anisotropy is the fundamental phenomenon of wave propagation in the earth’s interior. Numerical modeling of wave behavior is critical for exploration and global seismology studies. The full elastic (anisotropy) wave equation is often used to model the complexity of velocity anisotropy, but it ignores attenuation anisotropy. I have presented a time-domain displacement-stress formulation of the anisotropic-viscoelastic wave equation, which holds for arbitrarily anisotropic velocity and attenuation [Formula: see text]. The frequency-independent [Formula: see text] model is considered in the seismic frequency band; thus, anisotropic attenuation is mathematically expressed by way of fractional time derivatives, which are solved using the truncated Grünwald-Letnikov approximation. I evaluate the accuracy of numerical solutions in a homogeneous transversely isotropic (TI) medium by comparing with theoretical [Formula: see text] and [Formula: see text] values calculated from the Christoffel equation. Numerical modeling results show that the anisotropic attenuation is angle dependent and significantly different from the isotropic attenuation. In synthetic examples, I have proved its generality and feasibility by modeling wave propagation in a 2D TI inhomogeneous medium and a 3D orthorhombic inhomogeneous medium.
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Berthier, Serge. "Anisotropic effective medium theories." Journal de Physique I 4, no. 2 (February 1994): 303–18. http://dx.doi.org/10.1051/jp1:1994139.

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Qin, Xilin, Zhixian Gui, Fei Yang, and Yuanyuan Liu. "Anisotropic frequency-dependent characteristics of PP- and PS-waves in partially saturated double-porosity rocks." Journal of Geophysics and Engineering 18, no. 3 (June 2021): 355–68. http://dx.doi.org/10.1093/jge/gxab019.

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Abstract Most frequency-dependent AVO inversions are currently based on an approximate equation derived using an isotropic medium. However, actual reservoirs usually show anisotropy, such as shale reservoirs, tight sandstone reservoirs and fractured reservoirs. We propose a joint frequency-dependent AVO (JFAVO) inversion in an anisotropic medium based on a periodic layered double-porosity medium. This JFAVO will allow us to quantitatively study the influence of fluids on the dispersion of PP- and PS-wave velocities and anisotropic parameters. First, we used a double-porosity medium to analyse the frequency-dependent characteristics of velocities and anisotropy parameters. We found that the anisotropic parameters show obvious dispersions, similar to those of velocities. Then, we derived the JFAVO inversion based on Rüger's equation to extract the dispersion of velocities and anisotropic parameters. Finally, we analysed the stability and applicability of the inversion algorithm, and used three sets of models to analyse the sensitivity of dispersion properties to fluids. The numerical analysis results show that PP-wave velocity dispersion and anisotropic parameter δ dispersion are sensitive to fluids, whereas, the velocity dispersion of the PS-wave is not. When saturation exceeds 80%, the velocity dispersion and anisotropic parameter dispersion properties are not sensitive to fluids.
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Аshcheulov, А. А., D. А. Lavreniuk, and M. Ya Derevianchuk. "Electric field transformation effect in anisotropic dielectric medium." Технология и конструирование в электронной аппаратуре, no. 3-4 (2020): 24–27. http://dx.doi.org/10.15222/tkea2020.3-4.24.

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The authors consider the aspects of the electric field distribution in an anisotropic medium and establish how its longitudinal and transverse components depend on the geometric factors. A rectangular plate of dimensions a×b×c is studied, its selected crystallographic axes located in the plane of the side face (a×b), while one of the axes is oriented at a certain angle α to the edge a. It is shown that applying a certain potential difference to the upper and lower faces electrically polarizes the volume of the plate and causes the appearance of the longitudinal and transverse components of the internal electric field. The authors investigate the possibility of transforming the magnitude of the electric field and methods for its optimization. The transformation coefficient of such a device is determined by the anisotropy of the dielectric permeability of the plate material and its shape coefficient k = a/b. The paper considers one of the design options for an anisotropic dielectric transformer and proposes its equivalent electrical circuit. Structural elements based on anisotropic dielectric transformers may be widely used both in power supplies of various electronic devices and for coordination of radar transceiver systems with antenna arrays of centimeter, millimeter and submillimeter wavelength ranges. The possibility of simultaneous transformation of constant and alternating electric fields allows them to be used in devices of simultaneous comparison, enabling to determine the current values of voltage, as well as the power of electromagnetic radiation in a wide range of wavelengths. The vortex nature of the electric field in the plate’s volume caused by the coefficient anisotropy of the dielectric permeability also creates the preconditions for the emergence of new principles for generating high-power electromagnetic radiation in a wide spectral range. The generation frequency of such devices is determined by the geometric dimensions of the anisotropic plate. The use of the described transformation effect will significantly expand the possibilities of practical application of the considered electrostatic phenomena, which will lead to the emergence of a new generation of devices for microwave technology, electronics and electric power.
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Sams, Mark, Annushia Annamalai, and Jeremy Gallop. "Seismic amplitude variation with offset inversion in a vertical transverse isotropy medium." Interpretation 7, no. 3 (August 1, 2019): T581—T593. http://dx.doi.org/10.1190/int-2018-0137.1.

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Vertical transverse isotropy (VTI) will affect seismic inversion, but it is not possible to solve for the full set of anisotropic elastic parameters from amplitude variation with offset inversion because there exists an isotropic solution to every VTI problem. We can easily approximate the pseudoisotropic properties that result from the isotropic solution to the anisotropic problem for well-log data. We can then use these well-log properties to provide a low-frequency model for inversion and/or a framework for interpreting either absolute or relative inversion results. This, however, requires prior knowledge of the anisotropic properties, which are often unavailable or poorly constrained. If we ignore anisotropy and assume that the amplitude variations caused by VTI are going to be accounted for by effective wavelets, the inversion results would be in error: The impact of anisotropy is not merely a case of linear scaling of seismic amplitudes for any particular angle range. Ignoring VTI does not affect the prediction of acoustic impedance, but it does affect predictions of [Formula: see text] and density. For realistic values of anisotropy, these errors can be significant, such as predicting oil instead of brine. If the anisotropy of the rocks is known, then we can invert for the true vertical elastic properties using the known anisotropy coefficients through a facies-based inversion. This can produce a more accurate result than solving for pseudoelastic properties, and it can take advantage of the sometimes increased separation of isotropic and anisotropic rocks in the pseudoisotropic elastic domain. Because the effect of anisotropy will vary depending on the strength of the anisotropy and the distribution of the rocks, we strongly recommend forward modeling for each case prior to inversion to understand the potential impact on the study objectives.
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Mavko, Gary, and Kaushik Bandyopadhyay. "Approximate fluid substitution for vertical velocities in weakly anisotropic VTI rocks." GEOPHYSICS 74, no. 1 (January 2009): D1—D6. http://dx.doi.org/10.1190/1.3026552.

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Despite the prevalence of elastic anisotropy in rocks, most models used routinely for wave propagation, imaging, and rock physics assume an isotropic Earth. The main reason for using isotropic approximations is that we seldom measure enough parameters to characterize the stiffness tensor of a rock completely. Fluid substitution is an important example: because of an incomplete knowledge of the stiffness tensor, often we choose isotropic equations over their anisotropic form. Assuming weak anisotropy, we derive an approximate form of the anisotropic fluid-substitution equation for seismic waves propagating along the symmetry axis of a transversely isotropic medium. The approximation takes the form of the usual isotropic calculation, with a simple first-order correction proportional to the Thomsen anisotropic parameter [Formula: see text], thus requiring only three elastic constants. Because [Formula: see text] can be either greater than or less than zero in a VTI medium, we can explain why isotropic fluid substitution sometimes overpredicts or underpredicts the full anisotropic result. Numerical simulations show that the approximate equation is valid for anisotropic medium with absolute value of [Formula: see text] as high as 0.3.
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Аshcheulov, А. А., M. Ya Derevianchuk, D. А. Lavreniuk, and I. S. Romaniuk. "Electric current transformation by anisotropic electrically conductive medium." Технология и конструирование в электронной аппаратуре, no. 5-6 (2020): 28–32. http://dx.doi.org/10.15222/tkea2020.5-6.28.

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The authors consider the aspects of electric current distribution in electrically conductive anisotropic medium and establish how geometrical factors affect its longitudinal and transverse components. In the case of an a×b×с rectangular plate, its selected crystallographic axes are located on the plane of the side face a×b, whereas one of these axes is oriented at an angle α to the edge a. Applying a certain potential difference to the upper and lower end faces of the plate causes the appearance of longitudinal and transverse components of the internal electric current. The paper demonstrates the possibility of transforming the magnitude of the electric current and a way to optimize this magnitude. The transformation coefficient of such a device is determined by the anisotropy of the electrical conductivity of the plate and the coefficient of its shape k = a/b. The authors consider a few versions of anisotropic dielectric transformer design and offer their equivalent electric circuits. Another suggested transformer design is spiral in shape, compact and is characterized by high transformation coefficient value n. For example, at external radius r1 = 12,5 mm, internal radius r2 = 2 mm, height b = 2 mm and plate thickness c = 2,0 mm, its transformation coefficient n = 103. The information is given on existing monocrystalline and artificial anisotropic materials that can be used for the proposed device. High-temperature superconducting materials characterized by a high value of residual resistance anisotropy hold special promise in this case. Using the described transformation effect will significantly expand the possibilities of practical application of the considered electroohmic phenomenon. This will lead to the emergence of a new generation of devices for microwave technology, electronics and power engineering.
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Dissertations / Theses on the topic "Anisotropic medium"

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Golovnina, Svetlana M. "Modeling and inversion in weakly anisotropic media." [S.l. : s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=971440751.

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Ellefsen, Karl. "Elastic wave propagation along a borehole in an anisotropic medium." Thesis, Massachusetts Institute of Technology, 1990. http://hdl.handle.net/1721.1/52915.

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Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1990.
Includes bibliographic references (leaves 262-272).
by Karl John Ellefsen.
Sc.D.
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Tran, Nam Hung. "Hydro-mechanical behavior of deep tunnels in anisotropic poroelastic medium." Thesis, Orléans, 2016. http://www.theses.fr/2016ORLE2037/document.

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Les tunnels profonds sont souvent construits dans les roches sédimentaires et métamorphiques stratifiées qui présentent habituellement des propriétés anisotropes en raison de leur structure et des propriétés des constituants. Le présent travail vise à étudier les tunnels profonds dans un massif rocheux anisotrope élastique en portant une attention particulière sur les effets des couplages hydromécaniques par des approches analytiques et numériques. Une solution analytique pour un tunnel creusé dans un massif rocheux anisotrope saturé est développée en tenant compte du couplage hydro-mécanique dans le régime permanent. Cette solution analytique est utilisée pour réaliser une série d’études paramétriques afin d'évaluer les effets des différents paramètres du matériau anisotrope sur le comportement du tunnel. Dans un deuxième temps la solution analytique est élargie pour décrire le comportement du tunnel pendant la phase transitoire hydraulique. Afin de compléter ces études analytiques qui prennent en compte seulement un couplage unilatéral (dans le sens que seul le comportement hydraulique influence le comportement mécanique et pas l’inverse) de l’analyse numérique avec un couplage complet, ont été réalisés. Une application de la solution analytique sur la méthode de convergence-confinement est aussi bien abordée qui peut prendre en compte l'influence du front de taille du tunnel sur le travail du soutènement ainsi que sur le massif. La solution obtenue peut servir comme un outil de dimensionnement rapide des tunnels en milieux poreux en le combinant avec des approches de dimensionnement comme celle de convergence confinement
Deep tunnels are often built in the sedimentary and metamorphic foliated rocks which exhibits usually the anisotropic properties due to the presence of the discontinuity. The analysis of rock and liner stresses due to tunnel construction with the assumption of homogeneous and isotropic rock would be incorrect. The present thesis aims to deal with the deep tunnel in anisotropic rock with a particular emphasis on the effects of hydraulic phenomenon on the mechanical responses or reciprocal effects of hydraulic and mechanical phenomena by combining analytical and numerical approach. On that point of view, a closed-formed solution for tunnel excavated in saturated anisotropic ground is developed taking into account the hydromechanical coupling in steady-state. Based on the analytical solution obtained, parametric studies are conducted to evaluate the effects of different parameters of the anisotropic material on the tunnel behavior. The thesis considers also to extend the analytical solution with a time-dependent behavior which takes into account the impact of the pore pressure distribution on mechanical response over time, i.e., one way coupling modeling. In addition, some numerical analysis based on fully-coupled modeling, i.e., two ways coupling, are conducted which are considered as the complete solution for the analytical solution. An application of the closed-form solution on convergence-confinement method is as well referred which can take into account the influence of the tunnel face on the work of the support as well as the massif. The obtained solution could be used as a quick tool to calibrate tunnels in porous media by combining with design approaches such as convergence-confinement method
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Wei, Zheng. "Convection of water near 4°C in an anisotropic porous medium." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0013/MQ60920.pdf.

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Alani, Mahdi Ahmed 1954. "Neutral particle Green's function in an infinite medium with anisotropic scattering." Diss., The University of Arizona, 1999. http://hdl.handle.net/10150/282874.

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The linear Boltzmann equation for the transport of neutral particles is investigated with the objective of generating benchmark-quality calculations for homogeneous infinite media. In all cases, the problems are stationary, of one energy group, and the scattering is both isotropic and anisotropic. In the transport problems considered, the Green's function is generally the quantity of interest. The solution is obtained through the use of the Fourier transform method. The numerical inversions use standard numerical techniques, such as Gauss-Legendre quadrature, summation of infinite series, and Euler-Knopp acceleration. The most basic source of neutral particles is the point-beam source, or Green's function source. The Green's function in an infinite medium with isotropic scattering is treated as explained in chapter two. The Green's function in an infinite medium with anisotropic scattering is treated using two different mathematical methods as explained in chapters three and four. The results for both cases is shown in chapter 5.
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Pajevic, Sinisa, and George H. Weiss. "Effects of anisotropic optical parameters on the penetration of photons into a turbid medium: Effects of anisotropic optical parameters on the penetration ofphotons into a turbid medium." Diffusion fundamentals 4 (2007) 14, S.- 1-13, 2007. https://ul.qucosa.de/id/qucosa%3A14286.

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There are by now many applications of methods based on near- infrared radiation (NIR) used for optical imaging and therapeutic purposes in medical settings. Such optical techniques are appealing in not requiring potentially harmful ionizing radiation, being non-invasive, and generally being easily implementable. Since photons are randomly scattered by cell components, successful use of NIR requires knowledge of the photon trajectories expressed in statistical terminology. Until now the necessary analysis has been based on diffusion theory assuming that the scattering coefficient is an isotropic material property. We analyze the properties of the penetration depth when this assumption is violated. By penetration depth will be meant the depth attained in the turbid medium, given its ultimate emission at the planar surface at a time T , as a function of the degree of anisotropy of the scattering coefficient. Our analysis will be based on a continuous-time random walk formalism. Properties of both time-gated and continuous-wave experiments will be derived.
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Choi, Hyung Jip. "On iso- and nonisothermal crack problems of a layered anisotropic elastic medium." Diss., Virginia Polytechnic Institute and State University, 1991. http://hdl.handle.net/10919/53606.

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The iso- and non-isothermal crack problems of layered fiber-reinforced composite materials are investigated within the framework of linear anisotropic thermoelasticity and under the state of generalized plane deformation. The crack is assumed to be parallel to the layer bounding surfaces. By employing the Fourier integral transform technique and the flexibility/stiffness matrix formulation, the current mixed boundary value problems are reduced to solving a set of simultaneous singular integral equations with Cauchy-type kernels. The crack·tip stress intensity factors are then defined in terms of the solution of the integral equations. Numerical results are presented addressing the salient and unique features for a class of crack problems involving highly anisotropic fibrous composite materials. Specifically, the cases of a crack embedded i) within a homogeneous and anisotropic slab, ii) between two bonded dissimilar anisotropic half-spaces and iii) within the matrix-rich interlaminar region of a generally laminated anisotropic slab are considered. The effects of relative crack size, crack location and fiber volume fraction on the stress intensity factors are examined as a function of über angle. For the case of layered composites, the matrix-rich interlaminar region is modeled as a separate interlayer. As the interlayer thickness approaches zero, the interlaminar crack model illustrates no smooth transition to the ideal interface crack model of zero interlayer thickness which exhibits oscillatory stress singularities. The mixed-mode crack tip response is shown to involve the simultaneous presence of three fracture modes. It is demonstrated that the corresponding values of stress intensity factors are strongly influenced by the laminate stacking sequence and layer orientation. In addition, the partially insulated crack surface condition is observed to alleviate the severity of thermally-induced stress fields near the crack tip.
Ph. D.
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Pajevic, Sinisa, and George H. Weiss. "Effects of anisotropic optical parameters on the penetration of photons into a turbid medium." Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-194528.

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There are by now many applications of methods based on near- infrared radiation (NIR) used for optical imaging and therapeutic purposes in medical settings. Such optical techniques are appealing in not requiring potentially harmful ionizing radiation, being non-invasive, and generally being easily implementable. Since photons are randomly scattered by cell components, successful use of NIR requires knowledge of the photon trajectories expressed in statistical terminology. Until now the necessary analysis has been based on diffusion theory assuming that the scattering coefficient is an isotropic material property. We analyze the properties of the penetration depth when this assumption is violated. By penetration depth will be meant the depth attained in the turbid medium, given its ultimate emission at the planar surface at a time T , as a function of the degree of anisotropy of the scattering coefficient. Our analysis will be based on a continuous-time random walk formalism. Properties of both time-gated and continuous-wave experiments will be derived.
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Fooladi, Samaneh, and Samaneh Fooladi. "Numerical Implementation of Elastodynamic Green's Function for Anisotropic Media." Thesis, The University of Arizona, 2016. http://hdl.handle.net/10150/623144.

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Displacement Green's function is the building block for some semi-analytical methods like Boundary Element Method (BEM), Distributed Point Source Method (DPCM), etc. In this thesis, the displacement Green`s function in anisotropic media due to a time harmonic point force is studied. Unlike the isotropic media, the Green's function in anisotropic media does not have a closed form solution. The dynamic Green's function for an anisotropic medium can be written as a summation of singular and non-singular or regular parts. The singular part, being similar to the result of static Green's function, is in the form of an integral over an oblique circular path in 3D. This integral can be evaluated either by a numerical integration technique or can be converted to a summation of algebraic terms via the calculus of residue. The other part, which is the regular part, is in the form of an integral over the surface of a unit sphere. This integral needs to be evaluated numerically and its evaluation is considerably more time consuming than the singular part. Obtaining dynamic Green's function and its spatial derivatives involves calculation of these two types of integrals. The spatial derivatives of Green's function are important in calculating quantities like stress and stain tensors. The contribution of this thesis can be divided into two parts. In the first part, different integration techniques including Gauss Quadrature, Simpson's, Chebyshev, and Lebedev integration techniques are tried out and compared for evaluation of dynamic Green’s function. In addition the solution from the residue theorem is included for the singular part. The accuracy and performance of numerical implementation is studied in detail via different numerical examples. Convergence plots are used to analyze the numerical error for both Green's function and its derivatives. The second part of contribution of this thesis relates to the mathematical derivations. As mentioned above, the regular part of dynamic Green's function, being an integral over the surface of a unit sphere, is responsible for the majority of computational time. From symmetry properties, this integration domain can be reduced to a hemisphere, but no more simplification seems to be possible for a general anisotropic medium. In this thesis, the integration domain for regular part is further reduced to a quarter of a sphere for the particular case of transversely isotropic material. This reduction proposed for the first time in this thesis nearly halves the number of integration points for the evaluation of regular part of dynamic Green's function. It significantly reduces the computational time.
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Gnawali, Rudra. "Berreman Approach to Optical Propagation Through Anisotropic Metamaterials." University of Dayton / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1541108034610795.

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Books on the topic "Anisotropic medium"

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H, Williams James. Wave propagation in anisotropic medium due to an oscillatory point source with application to unidirectional composites. [Washington, D.C.]: National Aeronautics and Space Administration, Scientific and Technical Information Branch, 1986.

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Liao, Peter. Acoustic-ultrasonic input-output characterization of unidirectional fiber composite plate by P waves. Cleveland, Ohio: Lewis Research Center, 1988.

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Marques, Elizabeth R. C. Stress waves in transversely isotropic media: The homogeneous problems. Cleveland, Ohio: Lewis Research Center, 1986.

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C, Marques Elizabeth R., Lee Samson S, Lewis Research Center, and United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch., eds. Wave propagation in anisotropic medium due to an oscillatory point source with application to unidirectional composites. [Washington, D.C.]: National Aeronautics and Space Administration, Scientific and Technical Information Branch, 1986.

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Chimenti, Dale, Stanislav Rokhlin, and Peter Nagy. Physical Ultrasonics of Composites. Oxford University Press, 2011. http://dx.doi.org/10.1093/oso/9780195079609.001.0001.

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Physical Ultrasonics of Composites is a rigorous introduction to the characterization of composite materials by means of ultrasonic waves. Composites are treated here not simply as uniform media, but as inhomogeneous layered anisotropic media with internal structure characteristic of composite laminates. The objective here is to concentrate on exposing the singular behavior of ultrasonic waves as they interact with layered, anisotropic materials, materials which incorporate those structural elements typical of composite laminates. This book provides a synergistic description of both modeling and experimental methods in addressing wave propagation phenomena and composite property measurements. After a brief review of basic composite mechanics, a thorough treatment of ultrasonics in anisotropic media is presented, along with composite characterization methods. The interaction of ultrasonic waves at interfaces of anisotropic materials is discussed, as are guided waves in composite plates and rods. Waves in layered media are developed from the standpoint of the "Stiffness Matrix", a major advance over the conventional, potentially unstable Transfer Matrix approach. Laminated plates are treated both with the stiffness matrix and using Floquet analysis. The important influence on the received electronic signals in ultrasonic materials characterization from transducer geometry and placement are carefully exposed in a dedicated chapter. Ultrasonic wave interactions are especially susceptible to such influences because ultrasonic transducers are seldom more than a dozen or so wavelengths in diameter. The book ends with a chapter devoted to the emerging field of air-coupled ultrasonics. This new technology has come of age with the development of purpose-built transducers and electronics and is finding ever wider applications, particularly in the characterization of composite laminates.
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H, Williams James, United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch., and Lewis Research Center, eds. Stress waves in transversely isotropic media: The homogeneous problem. [Washington, D.C.]: National Aeronautics and Space Administration, Scientific and Technical Information Branch, 1986.

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Book chapters on the topic "Anisotropic medium"

1

Weik, Martin H. "anisotropic propagation medium." In Computer Science and Communications Dictionary, 51. Boston, MA: Springer US, 2000. http://dx.doi.org/10.1007/1-4020-0613-6_680.

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Eroglu, Abdullah. "Radiation in Anisotropic Medium." In Wave Propagation and Radiation in Gyrotropic and Anisotropic Media, 87–114. Boston, MA: Springer US, 2010. http://dx.doi.org/10.1007/978-1-4419-6024-5_5.

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Isupov, L. R. "Constitutive Equations of Plastic Anisotropic Composite Medium." In IUTAM Symposium on Micromechanics of Plasticity and Damage of Multiphase Materials, 91–98. Dordrecht: Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-009-1756-9_12.

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Bennacer, R. "Natural Convection in Anisotropic Heterogeneous Porous Medium." In Emerging Technologies and Techniques in Porous Media, 271–84. Dordrecht: Springer Netherlands, 2004. http://dx.doi.org/10.1007/978-94-007-0971-3_18.

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Eroglu, Abdullah. "Radiation in Gyrotropic Medium." In Wave Propagation and Radiation in Gyrotropic and Anisotropic Media, 115–41. Boston, MA: Springer US, 2010. http://dx.doi.org/10.1007/978-1-4419-6024-5_6.

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Zakir’yanova, G. K. "Fundamental Solutions of Dynamics of Anisotropic Elastic Medium." In Transactions on Engineering Technologies, 59–71. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-32-9531-5_5.

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Bouden, M., and S. K. Datta. "Rayleigh and Love Waves in Cladded Anisotropic Medium." In Review of Progress in Quantitative Nondestructive Evaluation, 1337–44. Boston, MA: Springer US, 1989. http://dx.doi.org/10.1007/978-1-4613-0817-1_167.

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Eroglu, Abdullah. "Wave Propagation and Dispersion Characteristics in Anisotropic Medium." In Wave Propagation and Radiation in Gyrotropic and Anisotropic Media, 15–28. Boston, MA: Springer US, 2010. http://dx.doi.org/10.1007/978-1-4419-6024-5_2.

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Mandai, Batakrishna, and M. Nafi Toksoz. "Effects of an explosive source in an anisotropic medium." In Explosion Source Phenomenology, 261–68. Washington, D. C.: American Geophysical Union, 1991. http://dx.doi.org/10.1029/gm065p0261.

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Eroglu, Abdullah. "Wave Propagation and Dispersion Characteristics in Gyrotropic Medium." In Wave Propagation and Radiation in Gyrotropic and Anisotropic Media, 29–55. Boston, MA: Springer US, 2010. http://dx.doi.org/10.1007/978-1-4419-6024-5_3.

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Conference papers on the topic "Anisotropic medium"

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Kanymgaziyeva, I. A. "Symmetrical antennas in anisotropic medium." In 2014 24th International Crimean Conference "Microwave & Telecommunication Technology" (CriMiCo). IEEE, 2014. http://dx.doi.org/10.1109/crmico.2014.6959505.

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E. Miller, D., J. Costa, and M. Schoenberg. "Inversion for the devine anisotropic medium." In 54th EAEG Meeting. European Association of Geoscientists & Engineers, 1992. http://dx.doi.org/10.3997/2214-4609.201410540.

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Eroglu, Abdullah. "Wave propagation in layered anisotropic medium." In 2010 14th Biennial IEEE Conference on Electromagnetic Field Computation (CEFC 2010). IEEE, 2010. http://dx.doi.org/10.1109/cefc.2010.5481755.

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Zhao, P., F. Wenzel, and P. Hatherly. "Vertical seismic profile in an anisotropic medium." In SEG Technical Program Expanded Abstracts 1993. Society of Exploration Geophysicists, 1993. http://dx.doi.org/10.1190/1.1822348.

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Kolisnychenko, Borys M., Vitalij N. Kurashov, Valeri V. Marienko, and Sergey N. Savenkov. "Polarimetry of inhomogeneous slab of anisotropic medium." In International Conference on Optical Diagnostics of Materials and Devices for Opto-, Micro-, and Quantum Electronics, edited by Sergey V. Svechnikov and Mikhail Y. Valakh. SPIE, 1998. http://dx.doi.org/10.1117/12.306261.

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Li, Wei, Nan Zeng, Yonghong He, and Hui Ma. "Propagation of polarized light in anisotropic medium." In SPIE BiOS: Biomedical Optics, edited by Steven L. Jacques, E. Duco Jansen, and William P. Roach. SPIE, 2009. http://dx.doi.org/10.1117/12.808390.

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Kostyukevych, A., N. Marmalevskyi, Y. Roganov, and V. Tulchinsky. "2.5d - 3c Fullwave Modeling in Anisotropic Medium." In Saint Petersburg 2008. Netherlands: EAGE Publications BV, 2008. http://dx.doi.org/10.3997/2214-4609.20146960.

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Li*, Junxiao, Guo Tao, Kristopher A. Innanen, Larry Lines, and Bing Wang. "Borehole Reverse Time Migration in Anisotropic Medium." In SEG Technical Program Expanded Abstracts 2015. Society of Exploration Geophysicists, 2015. http://dx.doi.org/10.1190/segam2015-5839458.1.

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Han, Xiang-e., and Jin Li. "Rayleigh scattering property of an anisotropic medium particle." In EM Theory (ISAPE - 2010). IEEE, 2010. http://dx.doi.org/10.1109/isape.2010.5696625.

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Tsai, Y. Y. "Analysis of cylindrical resonator filled with anisotropic medium." In 15th International Conference on Infrared and Millimeter Waves. SPIE, 1990. http://dx.doi.org/10.1117/12.2301645.

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Reports on the topic "Anisotropic medium"

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Mudaliar, Saba. Green's Functions for an Anisotropic Medium: Part 1. Unbounded Case. Fort Belvoir, VA: Defense Technical Information Center, December 1993. http://dx.doi.org/10.21236/ada278767.

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Mudaliar, Saba. Green's Functions for an Anisotropic Medium. Part 2. Two-Layer Case. Fort Belvoir, VA: Defense Technical Information Center, December 1993. http://dx.doi.org/10.21236/ada278788.

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Schulson, Erland M. On The Flow and Fracture of Sea Ice: The Transition from an Anisotropic Continuum to a Granular Medium. Fort Belvoir, VA: Defense Technical Information Center, September 2000. http://dx.doi.org/10.21236/ada609733.

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Schulson, Erland M. On the Flow and Fracture of Sea Ice: The Transition from an Anisotropic Continuum to a Granular Medium. Fort Belvoir, VA: Defense Technical Information Center, August 2001. http://dx.doi.org/10.21236/ada625938.

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Stewart, R. Transient electromagnetic scattering on anisotropic media. Office of Scientific and Technical Information (OSTI), January 1990. http://dx.doi.org/10.2172/7000416.

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Perez, Ignacio, paul Kulowitch, and Steven Shepard. Modeling of Pulsed Thermography in Anisotropic Media. Fort Belvoir, VA: Defense Technical Information Center, August 1999. http://dx.doi.org/10.21236/ada368628.

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Perez, Ignacio, Rachel Santos, Paul Kulowitch, and Steven Shepard. Modeling of Pulsed Thermography in Anisotropic Media. Fort Belvoir, VA: Defense Technical Information Center, January 1998. http://dx.doi.org/10.21236/ada350883.

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Toney, Michael F. High Anisotropy CoPtCrB Magnetic Recording Media. Office of Scientific and Technical Information (OSTI), June 2003. http://dx.doi.org/10.2172/813356.

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Kong, J. A. Three Dimensional Transient Analysis of Microstrip Circuits in Multilayered Anisotropic Media. Fort Belvoir, VA: Defense Technical Information Center, January 1993. http://dx.doi.org/10.21236/ada259829.

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Preston, Leiph A. Paraniso 1.0: 3-D Full Waveform Seismic Simulation in General Anisotropic Media. Office of Scientific and Technical Information (OSTI), September 2019. http://dx.doi.org/10.2172/1561580.

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