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Journal articles on the topic 'Anisotropic effect'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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1

Zhang, Chao, Xiangzhuang Kong, Xian Wang, Yanxia Du, and Guangming Xiao. "A Predicting Model for the Effective Thermal Conductivity of Anisotropic Open-Cell Foam." Energies 15, no. 16 (2022): 6091. http://dx.doi.org/10.3390/en15166091.

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The structural anisotropy of open-cell foam leads to the anisotropy of effective thermal conductivity (ETC). To quantitatively analyze the effect of structural anisotropy on the anisotropy of ETC, a new predicting model for the ETC of anisotropic open-cell foam was proposed based on an anisotropy tetrakaidecahedron cell (ATC). Feret diameters in three orthogonal directions obtained by morphological analysis of real foam structures were used to characterize the anisotropy of ATC. To validate our proposed anisotropic model, the ETCs of real foam structures in three orthogonal directions predicte

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2

Hood, J. A. "A simple method for decomposing fracture‐induced anisotropy." GEOPHYSICS 56, no. 8 (1991): 1275–79. http://dx.doi.org/10.1190/1.1443149.

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A heterogeneous mixture of isotropic elements may appear homogeneous and anisotropic when the scale of its fabric is smaller than the seismic wavelengths that measure it (Backus, 1962). These fabrics can result from thin layering or from oriented microcracks or fractures. In many situations the anisotropy is quite complex, resulting, for example, from fractures in previously anisotropic media. Since these anisotropies combine, the effect of each must be separated to permit the study of either the fractures or the preexisting anisotropy.

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3

KRAUS, L. "LOCAL MAGNETIC ANISOTROPY AND MAGNETOANELASTIC EFFECT IN AMORPHOUS AND NANOCRYSTALLINE ALLOYS." International Journal of Modern Physics B 07, no. 01n03 (1993): 916–21. http://dx.doi.org/10.1142/s0217979293001979.

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Anelastic deformation of amorphous and nanocrystalline metals results in an anisotropic distribution of atomic pair bonds. This mechanism can lead to rather strong macroscopic magnetic anisotropy in some alloys. Experimental results show that the creep-induced magnetic anisotropy of amorphous and nanocrystalline Fe- and Co-based alloys essentially depends both on TM and metalloid elements. This is a clear evidence that the random local magnetic anisotropy in these materials is closely related to the details of electronic structure. Based on this conclusion a model of bond -orientational anisot

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Song, Honghua, Yixin Zhao, Yaodong Jiang, and Jiehao Wang. "Scale Effect on the Anisotropy of Acoustic Emission in Coal." Shock and Vibration 2018 (December 18, 2018): 1–11. http://dx.doi.org/10.1155/2018/8386428.

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Acoustic emission (AE) in coal is anisotropic. In this paper, we investigate the microstructure-related scale effect on the anisotropic AE feature in coal at unconfined loading process. A series of coal specimens were processed with diameters of 25 mm, 38 mm, 50 mm, and 75 mm (height to diameter ratio of 2) and anisotropic angles of 0°, 15°, 30°, 45°, 60°, and 90°. The cumulative AE counts and energy dissipation increase with the specimen size, while the energy dissipation per AE count behaves in the opposite way. This may result from the increasing amount of both preexisting discontinuities a

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5

Thomsen, Leon. "Reflection seismology over azimuthally anisotropic media." GEOPHYSICS 53, no. 3 (1988): 304–13. http://dx.doi.org/10.1190/1.1442464.

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Recent surveys have shown that azimuthal anisotropy (due most plausibly to aligned fractures) has an important effect on seismic shear waves. Previous work had discussed these effects on VSP data; the same effects are seen in surface recording of reflections at small to moderate angles of incidence. The anisotropic effects on different polarization components of vertically traveling shear waves permit the recognition and estimation of very small degrees of azimuthal anisotropy (of order ⩾1 percent), as in an interferometer. Anisotropic effects on traveltime yield estimates of anisotropy which

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6

Wu, Feng Min, and Yuh Zhang Fang. "Anisotropic Growth of Metal Chains on Anisotropic Substrate." Solid State Phenomena 121-123 (March 2007): 1129–32. http://dx.doi.org/10.4028/www.scientific.net/ssp.121-123.1129.

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Based on the exchange mechanism of metal islands growth on anisotropic metal surfaces, the growth processes of anisotropic Cu islands on the anisotropic Pd (110) surface are investigated by Monte Carlo simulations with realistic growth model and physical parameters. The anisotropic diffusion and anisotropic sticking of Cu adatoms are included in the simulation model after being considered the anisotropy of Pd (110) surface and compared to the experiments. It is found that the larger diffusion rate along the [110] channels of Pd (110) surface gives rise to a slower growth rate of Cu island in t

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7

Hagiwara, Teruhiko. "Apparent dip and apparent anisotropy from multifrequency triaxial induction measurements." GEOPHYSICS 76, no. 1 (2011): F1—F13. http://dx.doi.org/10.1190/1.3511349.

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The triaxial (or multicomponent) induction log is used to measure not only the resistivity anisotropy of an anisotropic formation but also the relative dip of the tool with respect to the formation. The anisotropic resistivity and the relative dip of layered formations are also inverted from the triaxial induction-log measurements at a depth by assuming a homogeneous anisotropic formation or at multiple depths by assuming a multilayered formation model. When the triaxial induction log is run at multiple frequencies, multifrequency focusing can be applied to the log measurements. Then, the appa

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8

Keshavarz, Arash, and Rahmatollah Ghajar. "Effect of isotropic and anisotropic damage and plasticity on ductile crack initiation." International Journal of Damage Mechanics 28, no. 6 (2018): 918–42. http://dx.doi.org/10.1177/1056789518802625.

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In this article, the effects of plastic anisotropy and damage on ductile crack initiation (ductile failure) are studied in a thermodynamically consistent framework. First, isotropic and anisotropic continuum damage models of Lemaitre are modified to incorporate anisotropic plasticity. In the next stage, a subroutine is developed to add the damage formulation to Abaqus finite element package. A highly ductile material with anisotropic plastic behavior, API 5L X100 pipeline steel, is selected for this study. Finite element analyses are done to simulate isotropic/anisotropic plasticity coupled wi

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9

Saksala, Timo. "Effect of Grain Level Anisotropy on Numerical Rock Fracture Behaviour under Dynamic Loading." EPJ Web of Conferences 250 (2021): 02024. http://dx.doi.org/10.1051/epjconf/202125002024.

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The effect of rock crystal anisotropy is tested in numerical simulation of rock fracture at the laboratory sample level of scale. For this end, a numerical model based on the embedded discontinuity finite element method is applied here in simulations of uniaxial tension test on granitic rock. The rock material, consisting of Quartz (trigonal), Feldspar (triclinic) and Biotite (taken hexagonal here), is described as a linear elastic (up to fracture) heterogeneous and anisotropic material, which fails upon reaching the tensile strength of the individual constituent minerals. In the simulations o

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10

Boitz, Nepomuk, Anton Reshetnikov, and Serge A. Shapiro. "Visualizing effects of anisotropy on seismic moments and their potency-tensor isotropic equivalent." GEOPHYSICS 83, no. 3 (2018): C85—C97. http://dx.doi.org/10.1190/geo2017-0442.1.

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Radiation patterns of earthquakes contain important information on tectonic strain responsible for seismic events. However, elastic anisotropy may significantly impact these patterns. We systematically investigate and visualize the effect of anisotropy on the radiation patterns of microseismic events. For visualization, we use a vertical-transverse-isotropic (VTI) medium. We distinguish between two different effects: the anisotropy in the source and the anisotropy on the propagation path. Source anisotropy mathematically comes from the matrix multiplication of the anisotropic stiffness tensor

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11

Xie, Yuhong, Zhou Cao, and Jian Yu. "Effect of Soil Anisotropy on Ground Motion Characteristics." Buildings 13, no. 12 (2023): 3017. http://dx.doi.org/10.3390/buildings13123017.

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Soil transverse isotropy results in different stiffness characteristics in horizontal and vertical directions. However, the effect is usually neglected in seismic motion analysis. In this study, an equivalent linear anisotropic soil model was established based on the finite element method, and we investigated the impact of anisotropic parameters on ground motion at the site under various seismic wave inputs. It was found that the anisotropic parameters have a more significant effect on seismic waves, with the dominant frequency being closer to the fundamental frequency of the site. As an examp

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12

Reguera, Javier, Judith Langer, de Aberasturi Dorleta Jiménez, and Luis M. Liz-Marzán. "Anisotropic metal nanoparticles for surface enhanced Raman scattering." Chemical Society Reviews 46, no. 13 (2017): 3866–85. https://doi.org/10.1039/C7CS00158D.

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The optimization of the enhancement of Raman scattering by plasmonic effects is largely determined by the properties of the enhancing substrates. The main parameters behind this effect are related to the morphology of plasmonic nanoparticles and their relative distribution within the substrate. We focus this tutorial review on the effects of nanoparticle morphology, for the particular case of anisotropic metal nanoparticles. Anisotropy in silver and gold nanoparticles offers the possibility to tailor their plasmonic properties and intrinsic electromagnetic ‘‘hotspots’’.

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13

Zhou, Jian Ping, Jin Xia Liu, Wen Yang Gao, Zhi Wen Cui, Wei Guo Lv, and Ke Xie Wang. "Effect of Anisotropy on Shear Wave Velocity in Wood." Advanced Materials Research 535-537 (June 2012): 1923–26. http://dx.doi.org/10.4028/www.scientific.net/amr.535-537.1923.

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The velocities of shear waves propagating along radial direction of birch and elmwood specimens are measured in order to study the effect of anisotropy on shear wave velocity. The relationship between the shear wave velocity and the oscillation direction is examined by rotating an ultrasonic sensor. The results indicate that the effect of anisotropy on shear wave velocity in birch and elmwood specimens is similar to Japanese magnolia specimen. When the oscillation direction of the shear wave corresponds to the certain anisotropic direction of the wood specimen, the shear wave velocity decrease

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14

Jong, Yong-Gwang, Zixuan Chen, YongMin Ma, and Yang Liu. "Anisotropic Hypoplastic Model Considering the Relation between Fabric Tensor and Anisotropic Parameters." Geofluids 2022 (October 15, 2022): 1–15. http://dx.doi.org/10.1155/2022/2284648.

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The fabric anisotropy and anisotropic parameters have great effect on the mechanical property of sand. Based on the existing anisotropic model, a modified anisotropic hypoplastic model is developed by incorporating the relation between fabric tensor and anisotropic parameters into the nonlinear part of the constitutive model. The applicability of the improved anisotropic hypoplastic model is validated by comparing with the existing model and experimental data. As a result, it is found that the modified model can well predict the mechanical response of anisotropic sand.

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15

Parchinskiy, P. B., A. S. Gazizulina, A. A. Nasirov, and Sh U. Yuldashev. "Anisotropic magnetoresistance of GaMnAs:Be." Semiconductor Physics, Quantum Electronics and Optoelectronics 27, no. 03 (2024): 302–7. http://dx.doi.org/10.15407/spqeo27.03.302.

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The effect of co-doping with Be on the magnetic anisotropy in Ga0.972Mn0.028As epitaxial layers has been studied by magnetoresistance measurements. Co-doping with Be has been shown to lead to reorientation of both easy and hard magnetic axes in GaMnAs. Measurements of the temperature dependence of the anisotropic magnetoresistance demonstrate no changes in the type of the magnetic anisotropy with the increase in temperature. The results of the study of the anisotropic magnetoresistance indicate that the parameters of the magnetic anisotropy in GaMnAs are significantly influenced by the magnitu

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16

Novikov, Mikhail A., and Vadim V. Lisitsa. "NUMERICAL ALGORITHM OF SEISMIC ATTENUATION ESTIMATION IN ANISOTROPIC FRACTURED POROUS FLUID-SATURATED MEDIA." Interexpo GEO-Siberia 2, no. 2 (2021): 186–95. http://dx.doi.org/10.33764/2618-981x-2021-2-2-186-195.

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In our work we investigate the effect of transport and elastic properties anisotropy on seismic attenuation due to fracture-to-fracture wave-induced fluid flow using numerical algorithm of estimation of seismic wave attenuation in anisotropic fractured porous fluid-saturated media. Algorithm is based on numerical solution of anisotropic Biot equations using finite-difference scheme on staggered grid. We perform a set of numerical experiments to model wave propagation in fractured media with anisotropic fractured-filling material providing wave-induced fluid flow within interconnected fractures

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17

Smilović Zulim, M., and J. Radnić. "Anisotropy Effect of Masonry on the Behaviour and Bearing Capacity of Masonry Walls." Advances in Materials Science and Engineering 2020 (February 19, 2020): 1–14. http://dx.doi.org/10.1155/2020/5676901.

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Firstly, an updated numerical model for the numerical analysis of planar unreinforced and confined masonry walls is presented. The model can simulate the main nonlinear material effects of masonry and reinforced concrete. A simplified anisotropic constitutive model for masonry is developed and presented. The criteria for the limit bearing capacity and collapse of masonry are separately defined for normal stresses only and for normal and shear stresses. The presented numerical model is verified and used to analyse the anisotropy effect of masonry on the behaviour of unreinforced and confined tw

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18

Wang, Lixin, Shuoyan Zhang, Shanshan Li, Shixing Yan, and Shiyun Dong. "Inner surface of Nepenthes slippery zone: ratchet effect of lunate cells causes anisotropic superhydrophobicity." Royal Society Open Science 7, no. 3 (2020): 200066. http://dx.doi.org/10.1098/rsos.200066.

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Inner surface of Nepenthes slippery zone shows anisotropic superhydrophobic wettability. Here, we investigate what factors cause the anisotropy via sliding angle measurement, morphology/structure observation and model analysis. Static contact angle of ultrapure-water droplet exhibits the value of 154.80°–156.83°, and sliding angle towards pitcher bottom and up is 2.82 ± 0.45° and 5.22 ± 0.28°, respectively. The slippery zone under investigation is covered by plenty of lunate cells with both ends bending downward, and a dense layer of wax coverings without directional difference in morphology/s

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19

Gaiardoni, Irene, Mattia Trama, Alfonso Maiellaro, Claudio Guarcello, Francesco Romeo, and Roberta Citro. "Edelstein Effect in Isotropic and Anisotropic Rashba Models." Condensed Matter 10, no. 1 (2025): 15. https://doi.org/10.3390/condmat10010015.

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We investigate spin-to-charge conversion via the Edelstein effect in a 2D Rashba electron gas using the semiclassical Boltzmann approach. We analyze the magnetization arising from the direct Edelstein effect, taking into account an anisotropic Rashba model. We study how this effect depends on the effective masses and Rashba spin–orbit coupling parameters, extracting analytical expressions for the high electronic density regime. Indeed, it is possible to manipulate the anisotropy introduced into the system through these parameters to achieve a boost in the Edelstein response compared to the iso

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20

Šoltis, Tomáš, and Jozef Brestenský. "Magnetoconvection in a plane layer rotating about the horizontal axis: The effect of anisotropic diffusivities." Contributions to Geophysics and Geodesy 43, no. 4 (2013): 271–303. http://dx.doi.org/10.2478/congeo-2013-0017.

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Abstract A linear stability analysis of convection arising in a horizontal plane layer rotating about the horizontal axis and permeated by a homogeneous horizontal magnetic field perpendicular to the rotation axis is performed. Resulting horizontal convective rolls are inclined to the magnetic field at an angle dependent on the dimensionless numbers − the Elsasser, Ekman and Roberts numbers, and moreover on the anisotropy parameter, the ratio of horizontal and vertical diffusion coefficients (which are the viscosity and thermal diffusivity; magnetic diffusivity is considered isotropic). Two ty

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21

Li, Xu-Dong. "K Variations and Anisotropy: Microstructure Effect and Numerical Predictions." Journal of Engineering Materials and Technology 125, no. 1 (2002): 65–74. http://dx.doi.org/10.1115/1.1525252.

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Computer experiments were performed on simulated polycrystalline material samples that possess locally anisotropic microstructures to investigate stress intensity factor (K) variations and anisotropy along fronts of microcracks of different sizes. The anisotropic K, arising from inhomogeneous stresses in broken grains, was determined for planar microcracks by using a weight function-based numerical technique. It has been found that the grain-orientation-geometry-induced local anisotropy produces large variations in K along front of microcracks, when the crack size is of the order of few grain

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Nauman, Muhammad, Tayyaba Hussain, Joonyoung Choi, et al. "Low-field magnetic anisotropy of Sr₂IrO₄." Journal of Physics: Condensed Matter 34, no. 13 (2022): 135802. http://dx.doi.org/10.1088/1361-648x/ac484d.

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Abstract Magnetic anisotropy in strontium iridate (Sr2IrO4) is essential because of its strong spin–orbit coupling and crystal field effect. In this paper, we present a detailed mapping of the out-of-plane (OOP) magnetic anisotropy in Sr2IrO4 for different sample orientations using torque magnetometry measurements in the low-magnetic-field region before the isospins are completely ordered. Dominant in-plane anisotropy was identified at low fields, confirming the b axis as an easy magnetization axis. Based on the fitting analysis of the strong uniaxial magnetic anisotropy, we observed that the

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Ta, Na, Muhammad Umer Bilal, Ines Häusler та ін. "Simulation of the θ′ Precipitation Process with Interfacial Anisotropy Effects in Al-Cu Alloys". Materials 14, № 5 (2021): 1280. http://dx.doi.org/10.3390/ma14051280.

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The effects of anisotropic interfacial properties and heterogeneous elasticity on the growth and ripening of plate-like θ′-phase (Al2Cu) in Al-1.69 at.% Cu alloy are studied. Multi-phase-field simulations are conducted and discussed in comparison with aging experiments. The precipitate/matrix interface is considered to be anisotropic in terms of its energy and mobility. We find that the additional incorporation of an anisotropic interfacial mobility in conjunction with the elastic anisotropy result in substantially larger aspect ratios of the precipitates closer to the experimental observation

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Ubizskii, S. B., L. P. Pavlyk, and I. I. Syvorotka. "Ferromodulation Effect Usage for the Magnetic Film Anisotropy Investigation." Solid State Phenomena 190 (June 2012): 234–37. http://dx.doi.org/10.4028/www.scientific.net/ssp.190.234.

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The ferromodulation effect response model of an anisotropic soft magnetic film placed in the crossed permanent bias and alternating excitation magnetic fields is built. It was shown theoretically and experimentally how such a field configuration can be used for registering the effects relating to the film magnetic anisotropy properties.

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Watson, Julian Matthew, Abouzar Vakili, and Mateusz Jakubowski. "Rock Strength Anisotropy in High Stress Conditions: A Case Study for Application to Shaft Stability Assessments." Studia Geotechnica et Mechanica 37, no. 1 (2015): 115–25. http://dx.doi.org/10.1515/sgem-2015-0013.

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Abstract Although rock strength anisotropy is a well-known phenomenon in rock mechanics, its impact on geotechnical design is often ignored or underestimated. This paper explores the concept of anisotropy in a high stress environment using an improved unified constitutive model (IUCM), which can account for more complex failure mechanisms. The IUCM is used to better understand the typical responses of anisotropic rocks to underground mining. This study applies the IUCM to a proposed rock shaft located in high stress/anisotropic conditions. Results suggest that the effect of rock strength aniso

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Σαρόγλου, χ., Π. Μαρίνος, and Γ. Τσιαμπάος. "GEOLOGICAL CONTROLS ON INTACT ROCK STRENGTH. THE EFFECT OF ANISOTROPY." Bulletin of the Geological Society of Greece 36, no. 4 (2004): 1826. http://dx.doi.org/10.12681/bgsg.16653.

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The factors that influence the strength and deformation of the intact rock are the mineral composition, the fabric, the grain size and the degree of alteration and weathering. Anisotropy is a characteristic of intact foliated metamorphic rocks (slates, gneisses, phyllites, schists). The current paper deals with the pronounced effect of the fabric of anisotropic rocks on the strength and deformation characteristics of intact rocks. It is part of ongoing research in the Department of Geotechnical Engineering, National Technical University of Athens. Testing was used to establish the anisotropic

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Ciftja, Orion. "Quantum Hall effect systems of electrons with anisotropic patterns." AIP Advances 13, no. 1 (2023): 015036. http://dx.doi.org/10.1063/9.0000394.

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An almost ideal two-dimensional system of electrons can now be easily created in semiconductor heterojunctions. The quantum Hall effect state of the electrons is induced via the application of a strong perpendicular magnetic under specific quantum conditions. The most robust integer and/or fractional quantum Hall states already observed show the expected characteristic magnetoresistance for such systems. However, anisotropic patterns and features in transport properties have been seen for a few other peculiar cases. The origin of such anisotropic patterns may have various mechanisms or may als

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Stovas, Alexey, and Martin Landrø. "Fluid-pressure discrimination in anisotropic reservoir rocks — A sensitivity study." GEOPHYSICS 70, no. 3 (2005): O1—O11. http://dx.doi.org/10.1190/1.1926576.

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We investigate how seismic anisotropy influences our ability to distinguish between various production-related effects from time-lapse seismic data. Based on rock physics models and ultrasonic core measurements, we estimate variations in PP and PS reflectivity at the top reservoir interface for fluid saturation and pore pressure changes. The tested scenarios include isotropic shale, weak anisotropic shale, and highly anisotropic shale layers overlaying either an isotropic reservoir sand layer or a weak anisotropic sand layer. We find that, for transverse isotropic media with a vertical symmetr

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Chang, Ning, Zelong Yuan, Yunpeng Wang, and Jianchun Wang. "The effect of filter anisotropy on the large eddy simulation of turbulence." Physics of Fluids 35, no. 3 (2023): 035134. http://dx.doi.org/10.1063/5.0142643.

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We study the effect of filter anisotropy and sub-filter scale (SFS) dynamics on the accuracy of large eddy simulation (LES) of turbulence, by using several types of SFS models including the dynamic Smagorinsky model (DSM), dynamic mixed model (DMM), and the direct deconvolution model (DDM) with the anisotropic filter. The aspect ratios (AR) of the filters for LES range from 1 to 16. We show that the DDM is capable of predicting SFS stresses accurately at highly anisotropic filter. In the a priori study, the correlation coefficients of SFS stress reconstructed by the DDM are over 90%, which are

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de Campos, Marcos Flavio, Daniel Rodrigues, Mara Carolina do Carmo Paresque, and Jose Adilson de Castro. "Hysteresis Modeling of Bonded Anisotropic Ferrite Magnets." Materials Science Forum 912 (January 2018): 102–5. http://dx.doi.org/10.4028/www.scientific.net/msf.912.102.

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The modeling of hysteresis curves of bonded ferrite magnets is discussed. Hysteresis of anisotropic magnets were calculated according to the Stoner-Wohlfarth Model, for the cosn (theta) distribution. The crystallographic texture has significant effect on the hysteresis curve. Two different samples were examined, one isotropic and another anisotropic. The anisotropy field of strontium ferrite magnets was determined to be 19.5 kOe. The Mr/Ms ratio of the anisotropic bonded magnet was estimated as 0.8.

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Underwood, Shane, A. Homayoun Heidari, Murthy Guddati, and Y. Richard Kim. "Experimental Investigation of Anisotropy in Asphalt Concrete." Transportation Research Record: Journal of the Transportation Research Board 1929, no. 1 (2005): 238–47. http://dx.doi.org/10.1177/0361198105192900128.

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Accurate multiaxial characterization of asphalt concrete requires a thorough understanding of its anisotropic behavior. For that purpose a study has been conducted to examine the anisotropic properties of asphalt concrete in the linear viscoelastic range, with growing damage, and during volumetric deformation. Tests were conducted on specimens cored in the vertical and horizontal directions from gyratory-compacted specimens. Anisotropy was found to have no effect on the linear viscoelastic properties of the material. This finding is supported by subsequent results from monotonic constant cross

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Zhang, Lian Wei. "Influence of Anisotropic Internal Friction Angle on the Stability of Uniform Soil Slopes." Applied Mechanics and Materials 170-173 (May 2012): 270–73. http://dx.doi.org/10.4028/www.scientific.net/amm.170-173.270.

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The effect of anisotropy of friction angle in natural deposited soil on the stability of soil slopes was studied in this paper. Stability analysis was performed on a uniform soil slope with anisotropic friction angle. Spencer’s method was used, and the variation of friction angle was assumed to be linear to the change of direction of the slip surface. It was shown that 7-10 percent of change in safety factor might achieve within a 10m-highed anisotropic soil slope. It was also found from the analysis that that frictional anisotropy had no obvious effect on the location of critical slip surface

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Badreddine, Houssem, and Khemais Saanouni. "Advanced Anisotropic Damage Model Fully Coupled with Anisotropic Plasticity." Applied Mechanics and Materials 784 (August 2015): 153–60. http://dx.doi.org/10.4028/www.scientific.net/amm.784.153.

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In this work, a thermodynamically-consistent framework is used to formulate a non-associative finite strain anisotropic elastoplastic model fully coupled with anisotropic ductile damage. The finite strain assumption is considered using specific large strains kinematics based on multiplicative decomposition of the total transformation gradient and assuming a small elastic strains. The objectivity principle fulfillment is assumed using the well-known rotating frame formulation. The effective variables are defined to introduce the effect of the anisotropic damage on the other variables through th

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Kuforiji, H. I., R. Bello, A. O. Abatan, and O. D. Akinyemi. "Velocity Anisotropy: Temperature Effect on Thomson’s Parameter of Ogun Shale, Ogun State, Nigeria." Nigerian Journal of Physics 33, S (2024): 152–63. http://dx.doi.org/10.62292/njp.v33(s).2024.264.

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When a rock’s physical property is directional or orientation-dependent, the rock is described as being anisotropic. Shale is a common sedimentary rock with inherent anisotropic nature gotten from its geological evolution. Thus in studying the elastic properties of shale, the direction of the wave propagation has to be considered and reported. Velocity anisotropy of shale with temperature effect on the Thomson’s anisotropic parameters was carried out on shales from Ogun state in the southwestern part of Nigeria. Ultrasonic velocity measurement was carried out at temperatures ranging between 50

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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 (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 frequ

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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

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Lubkov, M. V. "Application of the finite element-differences method for modeling of anisotropic filtration processes." Bulletin of Taras Shevchenko National University of Kyiv. Series: Physics and Mathematics, no. 3 (2021): 63–66. http://dx.doi.org/10.17721/1812-5409.2021/3.10.

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We consider modeling and geophysical interpretation of the obtained results in the oil and gas production problems in anisotropic reservoirs. For solving these practical problems, we use combined finite element-differences method of resolving anisotropic piezoconductivity problem with calculation of heterogeneous filtration parameters distribution of oil and gas productive reservoirs and oil-gas penetration conditions in the borders of investigating areas. We have defined that the anisotropy of oil and gas permeability in the far zone of the well has a greater effect on the filtration processe

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Elhag, S. H., and F. S. Bayones. "Effect of Rotation, Gravity, Primary Stress and Magnetic Field on Shear Waves Spreading in an Anisotropic Incompressible Sandy Elastic Medium." Journal of Computational and Theoretical Nanoscience 16, no. 11 (2019): 4443–54. http://dx.doi.org/10.1166/jctn.2019.8610.

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In this paper, we investigated the spreading of shear wave in an anisotropic non-homogeneous elastic medium under effect of dry sand, rotation, gravity, primary stress, and magnetic field. We have reached equation of variation of shear wave velocity c1 in an anisotropic incompressible medium according to sand, rotation, gravity, primary stress, and magnetic field, then we used graphs to illustrate to show the effect of direction of spreading of shear wave. The results indicate that the effect of dry sand, rotation, gravity, primary stress, and magnetic field on the spreading of shear wave in a

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Hao, Qi, and Tariq Alkhalifah. "Viscoacoustic anisotropic wave equations." GEOPHYSICS 84, no. 6 (2019): C323—C337. http://dx.doi.org/10.1190/geo2018-0865.1.

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The wave equation plays a central role in seismic modeling, processing, imaging and inversion. Incorporating attenuation anisotropy into the acoustic anisotropic wave equations provides a choice for acoustic forward and inverse modeling in attenuating anisotropic media. However, the existing viscoacoustic anisotropic wave equations are obtained for a specified viscoacoustic model. We have developed a relatively general representation of the scalar and vector viscoacoustic wave equations for orthorhombic anisotropy. We also obtain the viscoacoustic wave equations for transverse isotropy as a sp

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Sivakumar, Vinayagamoorthy, Isaac Gregg Doran, Jim Graham, and Arvee Johnson. "The effect of anisotropic elasticity on the yielding characteristics of overconsolidated natural clay." Canadian Geotechnical Journal 38, no. 1 (2001): 125–37. http://dx.doi.org/10.1139/t00-074.

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Quantitative application of elastoplastic theory to the yielding behaviour of natural soils has always been uncertain. Part of the reason is that the theory was developed for reconstituted materials with isotropic structure, in contrast to natural soils that are usually anisotropic. The approach considered in this study assumes that pre-yielding behaviour is governed by the theory of linear anisotropic elasticity and that yield loci in the mean effective stress ( p') deviator stress (q) plane are aligned approximately along the coefficient of earth pressure (K0) line. The assumption of a rot

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Edwin, Privita Edwina Rayappan George, Sumeet Kumar, Srestha Roy, Basudev Roy, and Saumendra Kumar Bajpai. "Anisotropic 3D confinement of MCF-7 cells induces directed cell-migration and viscoelastic anisotropy of cell-membrane." Physical Biology 20, no. 1 (2022): 016003. http://dx.doi.org/10.1088/1478-3975/ac9bc1.

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Abstract Tumor-associated collagen signature-3 (TACS-3) is a prognostic indicator for breast cancer survival. It is characterized by highly organized, parallel bundles of collagen fibers oriented perpendicular to the tumor boundary, serving as directional, confining channels for cancer cell invasion. Here we design a TACS-3-mimetic anisotropic, confined collagen I matrix and examine the relation between anisotropy of matrix, directed cellular migration, and anisotropy of cell membrane-the first direct contact between TACS-3 and cell-using Michigan Cancer Foundation-7 (MCF-7) cells as cancer-mo

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Tian, Yu, Hao Chen, Zijun Yao, and Yufei Fang. "A Multiscale Method to Develop Three-Dimensional Anisotropic Constitutive Model for Soils." Buildings 14, no. 2 (2024): 307. http://dx.doi.org/10.3390/buildings14020307.

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A multiscale method is presented to develop a constitutive model for anisotropic soils in a three-dimensional (3D) stress state. A fabric tensor and its evolution, which quantify the particle arrangement at the microscale, are adopted to describe the effects of the inherent and induced anisotropy on the mechanical behaviors at the macroscale. Using two steps of stress mapping, the deformation and failure of anisotropic soil under the 3D stress state are equivalent to those of isotropic soil under the triaxial compression stress state. A series of discrete element method (DEM) simulations are c

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Mohd Rusdi, Nadia Diana, Nor Fadzillah Mohd Mokhtar, Norazak Senu, and Siti Suzilliana Putri Mohamed Isa. "Stability Convection in a Couple Stress Fluid Saturated in an Anisotropic Porous Medium with Internal Heating Effect." Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 76, no. 2 (2020): 75–84. http://dx.doi.org/10.37934/arfmts.76.2.7584.

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Internal heating effect with stability convection in a couple stress fluid saturated in an anisotropic porous medium has been studied numerically using linear stability analysis. The presence of internal heating on couple stress fluid in an anisotropic porous medium heated from below has been verified. The momentum equation and Boussinesq approximation is used for the density variation in the porous medium. By using Chebyshev Tau method numerically, the eigenvalue problems of the perturbed state were obtained from a normal mode analysis. The effect of the Rayleigh number, internal heat source

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Balaji, C., S. Maruthamanikandan, C. Rudresha, and V. Vidya Shree. "Anisotropic Darcy–Brinkman Magnetic Fluid Convection under the Influence of a Time-Dependent Sinusoidal Magnetic Field." Ukrainian Journal of Physics 68, no. 11 (2023): 730. http://dx.doi.org/10.15407/ujpe68.11.730.

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The impact of the sinusoidal mode of a magnetic field involving time fluctuations on the threshold of the ferromagnetic smart liquid convection in a saturated permeable medium is investigated using the regular perturbation technique. The Darcy–Brinkman model with anisotropic permeability is used to describe the flow through porous media. The thermal anisotropy is implemented in the energy equation. The problem might be useful in thermal engineering applications such as dynamic loudspeakers and computer hard discs and in medical applications like the treatment of tumor cells and the cell separa

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Ravisha, M., I. S. Shivakumara, and A. L. Mamatha. "Thermomagnetic Convection in Porous Media: Effect of Anisotropy and Local Thermal Nonequilibrium." Defect and Diffusion Forum 378 (September 2017): 137–56. http://dx.doi.org/10.4028/www.scientific.net/ddf.378.137.

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The onset of thermomagnetic convection in an anisotropic layer of Darcy porous medium in the presence of a uniform vertical magnetic field is investigated using a local thermal nonequilibrium (LTNE) model for energy equation representing the solid and fluid phases separately. Anisotropies in permeability as well as in fluid and solid thermal conductivities are considered. The principle of exchange of stability is shown to be valid. Asymptotic solutions for the Rayleigh number for both small and large values of scaled interphase heat transfer coefficient are presented and the comparison of resu

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Vladimirov, Ivaylo N., and Stefanie Reese. "Prediction of Springback in Unconstrained Bending by a Model for Evolving Elastic and Plastic Anisotropy." Key Engineering Materials 554-557 (June 2013): 2330–37. http://dx.doi.org/10.4028/www.scientific.net/kem.554-557.2330.

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Sheet metals exhibit anisotropic plastic behavior due to the large plastic deformations that occur during the rolling of the sheet and which induce texture and are responsible for the initial anisotropy. There exist various possibilities to introduce plastic anisotropy into the finite element modelling of sheet metal forming. The initial yield anisotropy can be incorporated either through an anisotropic yield surface or directly by means of a crystallographic texture model. Here, one basically differentiates between empirical and phenomenological anisotropic yield function equations, where the

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Atmaodi, Berith, and Wahyudi W. Parnadi. "Development of azimuthal resistivity survey data processing program with graphical user interface for anisotropic coefficient quantification." Journal of Physics: Conference Series 2243, no. 1 (2022): 012028. http://dx.doi.org/10.1088/1742-6596/2243/1/012028.

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Abstract The physical properties of underground material are anisotropic. This applies to all physical properties including resistivity. Anisotropic property is quantified by the anisotropic coefficient. The anisotropy of physical properties can be shown by 2D and or 3D modeling, but it is not always economically efficient for small-scale studies, while 1D modeling is not capable of showing the anisotropy effect. One of the many geophysical methods developed to learn about anisotropic properties under the earth is the azimuthal resistivity survey (ARS) which is the improvement of the vertical

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Liang, Wenhui, Fengxia Hu, Jian Zhang, et al. "Anisotropic nonvolatile magnetization controlled by electric field in amorphous SmCo thin films grown on (011)-cut PMN-PT substrates." Nanoscale 11, no. 1 (2019): 246–57. http://dx.doi.org/10.1039/c8nr06449k.

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Shen, Xiaobin, Xiaochuan Liu, Guiping Lin, Xueqin Bu, and Dongsheng Wen. "Effects of anisotropic composite skin on electrothermal anti-icing system." Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 233, no. 14 (2019): 5403–13. http://dx.doi.org/10.1177/0954410019845980.

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To study the effects of anisotropic thermal conductivity of composite aircraft skin on the heat transfer characteristics of electrothermal anti-icing system, the differential equation of anisotropic heat conduction was established using coordinate transformation of principal anisotropy axis. In addition, it was coupled with the heat and mass transfer model of the runback water film on the anti-icing surface to perform numerical simulation of the electrothermal anti-icing system. The temperature results of the vertical and cylindrical orthotropic thermal conduction in the rectangular and semi-c

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Carrion, Philip, Jesse Costa, Jose E. Ferrer Pinheiro, and Michael Schoenberg. "Cross‐borehole tomography in anisotropic media." GEOPHYSICS 57, no. 9 (1992): 1194–98. http://dx.doi.org/10.1190/1.1443333.

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Anisotropy has significant effect on traveltime cross‐borehole tomography. Even relatively weak anisotropy cannot be ignored if accurate velocity estimates are desired, since isotropic traveltime tomography treats anisotropy as inhomogeneity. Traveltime data in our examples were synthetically generated by a ray‐tracing code for anisotropic media, and the computed quasi‐P‐wave traveltimes were subsequently inverted using the “dual tomography” technique (Carrion, 1991). The results of the tomographic inversion show typical artifacts due to the anisotropy, and that accurate imaging is impossible

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