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Artykuły w czasopismach na temat „Strength anisotropy”

Autor: Grafiati

Data publikacji: 19 października 2024

Data aktualizacji: 31 lipca 2025

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1

Suman, Panthee. "Relationship between UCS and Anisotropic Angle: A Case Study for Slate of Himalaya Region." International Journal of Innovative Technology and Exploring Engineering (IJITEE) 14, no. 2 (2025): 21–24. https://doi.org/10.35940/ijitee.D4598.14020125.

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<strong>Abstract: </strong>The strength of rocks exhibits anisotropy, because of its mode of formation and its developing through different pressure and temperature environment. A rock can display anisotropy due to inhomogeneity, where sedimentary varying with the degree of the anisotropic plane. This "strength anisotropy" refers to the change in intact rock strength under uniaxial loading conditions based on the orientation of anisotropy, the strength and deformation behavior of rocks under load is critical for underground excavations, mining, and civil engineering projects, as it directly im

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Gupta, Anand, Suman Panthee, and Dr Janani Selvam. "Relationship between UCS and Anisotropic Angle: A Case Study for Slate of Himalaya Region." International Journal of Innovative Technology and Exploring Engineering 14, no. 2 (2025): 21–24. https://doi.org/10.35940/ijitee.d4598.14020125.

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The strength of rocks exhibits anisotropy, because of its mode of formation and its developing through different pressure and temperature environment. A rock can display anisotropy due to inhomogeneity, where sedimentary varying with the degree of the anisotropic plane. This strength anisotropy" refers to the change in intact rock strength under uniaxial loading conditions based on the orientation of anisotropy, the strength and deformation behavior of rocks under load is critical for underground excavations, mining, and civil engineering projects, as it directly impacts the stability of such

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3

Guo, Songfeng, Shengwen Qi, Bowen Zheng, et al. "The Confinement-Affected Strength Variety of Anisotropic Rock Mass." Materials 15, no. 23 (2022): 8444. http://dx.doi.org/10.3390/ma15238444.

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It has been recognized that the anisotropic structures dominate the deformation and strength properties of laminated rock masses. The resultant strength anisotropy is strongly affected by confining pressures beyond anisotropic structures. Nevertheless, the effects of confinement are inconsistent among existing experiments and not fully understood. This study focuses on the effects of confining pressure on strength anisotropy through theoretical derivation together with experimental results analysis. The variations in the possibility of anisotropic structural plane dominant failure and strength

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4

Reid, D., R. Fanni, and A. Fourie. "Assessing the undrained strength cross-anisotropy of three tailings types." Géotechnique Letters 12, no. 1 (2022): 1–7. http://dx.doi.org/10.1680/jgele.21.00094.

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The cross-anisotropic nature of soil strength has been studied and documented for decades, including the increased propensity for cross-anisotropy in layered materials. However, current engineering practice for tailings storage facilities (TSFs) does not appear to generally include cross-anisotropy considerations in the development of shear strengths. This is despite the very commonly seen layering profile in subaerially deposited tailings. To provide additional data to highlight the strength cross-anisotropy of tailings, high-quality block samples from three TSFs were obtained and trimmed to

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5

Cheng, Jingyi, Zhijun Wan, Yidong Zhang, Wenfeng Li, Syd S. Peng, and Peng Zhang. "Experimental Study on Anisotropic Strength and Deformation Behavior of a Coal Measure Shale under Room Dried and Water Saturated Conditions." Shock and Vibration 2015 (2015): 1–13. http://dx.doi.org/10.1155/2015/290293.

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This paper presents an experimental investigation of anisotropic strength and deformation behavior of coal measure shale. The effect of two factors (i.e., anisotropy and water content) on shale strength and deformation behavior was studied. A series of uniaxial and triaxial compression tests were conducted on both room dried and water saturated samples for different lamination angles. The test results indicate that (1) the compressive strength, cohesion, internal friction angle, tangent Young’s modulus, and axial strain corresponding to the peak and residual strengths of room dried specimens e

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6

Lai, Van Qui, Jim Shiau, Suraparb Keawsawasvong, Sorawit Seehavong, and Lowell Tan Cabangon. "Undrained Stability of Unsupported Rectangular Excavations: Anisotropy and Non-Homogeneity in 3D." Buildings 12, no. 9 (2022): 1425. http://dx.doi.org/10.3390/buildings12091425.

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The stability of unsupported rectangular excavations in undrained clay is examined under the influence of anisotropy and heterogeneity using the three-dimensional finite element upper and lower bound limit analysis with the Anisotropic Undrained Shear (AUS) failure criterion. Three anisotropic undrained shear strengths are considered in the study, namely triaxial compression, triaxial extension, and direct simple shear. Special considerations are given to the study of the linearly-increased anisotropic shear strengths with depth. The numerical solutions are presented by an undrained stability

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7

Jena, Pradipta Kumar, K. Siva Kumar, and A. K. Singh. "Effect of Tempering Temperature on Microstructure, Texture and Mechanical Properties of a High Strength Steel." International Journal of Manufacturing, Materials, and Mechanical Engineering 4, no. 3 (2014): 33–49. http://dx.doi.org/10.4018/ijmmme.2014070102.

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This work describes the microstructure, texture and anisotropy in mechanical behavior of a high strength steel in various tempered conditions. The microstructures and mechanical properties change considerably with varying tempering temperatures. The material exhibits low in-plane anisotropy and low anisotropic index in terms of yield strength and elongation with increase in tempering temperature. The anisotropy of the material displays similar behavior to that of the yield strength.

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8

Lee, K. M., and R. K. Rowe. "Effects of undrained strength anisotropy on surface subsidences induced by the construction of shallow tunnels." Canadian Geotechnical Journal 26, no. 2 (1989): 279–91. http://dx.doi.org/10.1139/t89-037.

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The implementation of an anisotropic soil model that allows consideration of the variation of undrained strength due to anisotropy is described. This analysis is then used to identify the significance of strength anisotropy on the prediction of deformation behaviour of a shallow tunnel. It is found that, for the case of an unlined tunnel, attention should be given to the effect of strength anisotropy particularly for a soil possessing type "K" anisotropy (i.e., where the smallest undrained strength occurs at an angle θ other than the vertical or the horizontal, and the smallest value usually o

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9

Song, Xinlei, Quanbiao Xu, Hailong Wang, Xiaoyan Sun, and Feng Xue. "Flowability-Dependent Anisotropic Mechanical Properties of 3D Printing Concrete: Experimental and Theoretical Study." Applied Sciences 15, no. 11 (2025): 6070. https://doi.org/10.3390/app15116070.

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Three-dimensional printing concrete (3DPC) has garnered significant attention for its construction efficiency and complex geometric capabilities. However, its mechanical properties differ markedly from cast-in-place concrete due to interlayer/intralayer interface weakening and pore anisotropy. Flowability directly regulates printability and pore distribution, thereby influencing mechanical properties. This study systematically examines flowability’s effects on 3DPC mechanical properties through compressive, flexural, and interfacial splitting tensile tests, integrated with Griffith’s fracture

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10

Seki, Hironori, Masakazu Tane, and Hideo Nakajima. "Fatigue Strength of Lotus-Type Porous Magnesium." Materials Science Forum 561-565 (October 2007): 1681–84. http://dx.doi.org/10.4028/www.scientific.net/msf.561-565.1681.

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We studied the fatigue strength of lotus-type porous magnesium with cylindrical pores aligned unidirectionally, which was fabricated through unidirectional solidification in pressurized hydrogen atmospheres. The fatigue strength shows anisotropy; the fatigue strength in the direction parallel to the longitudinal axis of pores is higher than that in the perpendicular direction. Not only anisotropic pores but also fiber texture grown along the pore direction contributes to the anisotropy in the fatigue strength.

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11

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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12

Shesterikov, S. A., A. M. Lokochtchenko, and E. A. Mjakotin. "Creep Rupture of Anisotropic Pipes." Journal of Pressure Vessel Technology 120, no. 3 (1998): 223–25. http://dx.doi.org/10.1115/1.2842049.

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The problem of creep rupture of pipes from an anisotropic material is studied. The authors suggest a method describing the results of creep rupture tests on thin-walled pipes under complex stress state by taking the strength anisotropy of material into account. A coefficient of strength anisotropy has been determined from the results of creep rupture testing, and a method is given for calculation under various modes of complex stress state. This procedure is based on evaluating the values of the statistical spread from the experimental data. The anisotropy coefficient corresponding to the mini

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13

Alencar, A., M. Muñiz-Menéndez, I. Pérez-Rey, and R. Galindo. "An experimental study of tensile stress and deformation in an anisotropic rock." IOP Conference Series: Earth and Environmental Science 1295, no. 1 (2024): 012010. http://dx.doi.org/10.1088/1755-1315/1295/1/012010.

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Abstract Anisotropy is a very common condition in rock mass; it can be due to different factors and directly affects the failure mechanisms affecting the rock mass. For example, metamorphic rocks that are foliated, sedimentary rocks that are stratified or volcanic formations with alternating layers. Despite the existence of several studies related to anisotropy those specifically addressing the tensile strength of anisotropic rocks are quite limited. The present study is focused on the determination of the deformability, compressive and tensile strength of anisotropic rocks. It must be highlig

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14

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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15

Zapata-Medina, David G., Leon D. Cortes-Garcia, Richard J. Finno, and Luis G. Arboleda-Monsalve. "Stiffness and strength anisotropy of overconsolidated Bootlegger Cove clays." Canadian Geotechnical Journal 57, no. 11 (2020): 1652–63. http://dx.doi.org/10.1139/cgj-2019-0068.

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This paper presents the evaluation of the stiffness and strength anisotropy of overconsolidated (OC) Bootlegger Cove Formation (BCF) clays at the Port of Alaska, formerly known as the Port of Anchorage. The stiffness and strength anisotropic material response was evaluated based on triaxial samples equipped with internal instrumentation including a submersible load cell and three subminiature linear variable displacement transducers (LVDTs). Three sets of bender elements were used in this research to measure shear wave velocities for different propagation and polarization directions. The effec

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16

Khan, R. "Anisotropic Deformation Behavior of Al2024T351 Aluminum Alloy." Journal of Engineering Research [TJER] 10, no. 1 (2013): 80. http://dx.doi.org/10.24200/tjer.vol10iss1pp80-87.

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The objective of this work was to investigate the effects of material anisotropy on the yielding and hardening behavior of 2024T351 aluminum alloy using isotropic and anisotropic yield criteria. Anisotropy may be induced in a material during the manufacturing through processes like rolling or forging. This induced anisotropy gives rise to the concept of orientation-dependent material properties such as yield strength, ductility, strain hardening, fracture strength, or fatigue resistance. Inclusion of the effects of anisotropy is essential in correctly predicting the deformation behavior of a m

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17

Ou, Xuefeng, Xuemin Zhang, Han Feng, Cong Zhang, Xianshun Zhou, and Lei Wang. "Static and Dynamic Brazilian Tests on Layered Slate considering the Bedding Directivity." Advances in Civil Engineering 2020 (December 16, 2020): 1–11. http://dx.doi.org/10.1155/2020/8860558.

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A layered rock usually exhibits strong anisotropy due to its layered structure. In order to study the anisotropic effect on its static and dynamic tensile properties, a medium strength anisotropy slate is chosen and tested in five groups of bedding plane dip angles. The dynamic tests were carried out by a split Hopkinson pressure bar (SHPB), and the failure process of rock samples is recorded by a high-speed camera. The failure mode and strength characteristic of the slate are analyzed. The static test results show that layered structure significantly affects the failure mode, and the influenc

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18

Wang, Xiao-Wen, Kai Cui, Yuan Ran, Yu Tian, Bo-Han Wu, and Wen-Bin Xiao. "Integration and Application of a Fabric-Based Modified Cam-Clay Model in FLAC3D." Geosciences 15, no. 1 (2025): 18. https://doi.org/10.3390/geosciences15010018.

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In order to consider the effect of fabric anisotropy in the analysis of geotechnical boundary value problems, this study proposes a modified model based on a fabric-based modified Cam-clay model, which can account for the anisotropic response of soil. The major modification of the original model aims to simplify the equations for numerical implementation by replacing the SMP strength criterion with the Lade’s strength criterion. This model comprehensively considers the inherent anisotropy, induced anisotropy, and three-dimensional strength characteristics of soil. The model is first numericall

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19

Chen, Rui, Zai Hong Li, Wei Dong Lei, and Wen Bin Luo. "Strength Anisotropy of a Tailings Sand and its Effect on Stability of a Tailing Dam." Advanced Materials Research 261-263 (May 2011): 1719–23. http://dx.doi.org/10.4028/www.scientific.net/amr.261-263.1719.

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In current engineering practice, the effect of strength anisotropy on stability analysis of tailings dam is often ignored. This paper presents direct shear test results on a tailing sand with different angles between shear direction and bedding plane. It is found that shear strength of this soil is significantly directional dependent. The variations in peak friction angle are about 11o, which is approximately 28.3% of the minimum value. The effect of strength anisotropy on stability of a tailings dam is also investigated. The analysis considering anisotropic strength shows a smaller factor of

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20

Garga, Vinod K., and Mahbubul A. Khan. "Interpretation of field vane strength of an anisotropic soil." Canadian Geotechnical Journal 29, no. 4 (1992): 627–37. http://dx.doi.org/10.1139/t92-070.

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Determination of the undrained shear strength (Su) of overconsolidated soils such as the weathered clay crust overlying Leda clay is important for the design of shallow foundations and embankments. In situ vane shear tests and isotropically consolidated undrained triaxial tests have been conventionally used for this purpose. Contrasting test results from these two methods, low Su obtained from triaxial tests and high Su obtained from in situ vane shear tests, motivated further research into this problem. Strength anisotropy, due to in situ anisotropic state of stress and orientation of soil fa

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21

Zhu, Zifang, Bowen Zheng, Shengwen Qi, et al. "Study of the Macro-Mesoscopic Shear Anisotropic Mechanical Behavior of Reservoir Shale." Processes 13, no. 5 (2025): 1404. https://doi.org/10.3390/pr13051404.

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Shear failure is pivotal in fracture evolution and stimulated reservoir volume (SRV) during hydraulic fracturing, particularly in bedded shale formations. However, the limited availability of coupled macro- and mesoscale experimental data on the shear behavior of reservoir shale constrains a comprehensive understanding of its anisotropic shear mechanical properties across scales. This study systematically investigates shear anisotropy at both macro- and mesoscales in shale with varying bedding orientations under different normal stress conditions. The key findings are summarized as follows: (1

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22

Kaldar-ool, A. K. B., R. N. Sandan, and A. Kh H. Mongush. "Elastic con- stants of cylindrically anisotropic material." Vestnik Tomskogo gosudarstvennogo arkhitekturno-stroitel'nogo universiteta. JOURNAL of Construction and Architecture 26, no. 3 (2024): 158–69. http://dx.doi.org/10.31675/1607-1859-2024-26-3-158-169.

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This article examines new cylindrically anisotropic materials, including winding composite materials reinforced with various fiber, and a mathematical solution of the fourth-order partial differential equation with two variables in polar coordinates.Purpose: Ther aim of this work is to study anisotropy properties of composite materials with cylindrical anisotropy.Methodology/approach: Foe a solution, equations are translated into Cartesian coordinates, and stress functions are used as a sum of polynomials. As a result of the solution, two relations are obtained between the elastic constants in

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23

Jafarzadeh, Fardin, Amirsajjad Poorakbar, and Mahdi Moghayad. "Investigation on the effect of intermediate principal stress on shear behaviour of unsaturated soils." E3S Web of Conferences 544 (2024): 01033. http://dx.doi.org/10.1051/e3sconf/202454401033.

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Directional-dependent properties of the soil, like shear strength, stiffness and hydraulic conductivity, are known as anisotropy in soils. Shape and size of the soil particles and void distribution as microstructure characteristics and external factors such as stress history, environmental and geological conditions, and present stress condition can be the causes of the anisotropy in soils. In this paper, the behaviour of soil has been studied in stress-strain plain under monotonic anisotropic loading to investigate the effect of induced anisotropy on brittleness index of soil sample. The britt

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24

Chu, Xuanxuan, Jiang Zhu, and Hongzhen Chen. "Assessment of Undrained Bearing Capacity of Foundations on Anisotropic Clay Slope Under Inclined Load." Journal of Marine Science and Engineering 13, no. 4 (2025): 681. https://doi.org/10.3390/jmse13040681.

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The development of marine energy requires reliable foundations, which may be located near submarine slopes. This paper utilizes the lower bound limit analysis (LBLA) to analyze the undrained bearing capacity of foundations on slopes with anisotropy and linearly increasing strength with depth. The anisotropic undrained strength (AUS) model is employed to simulate the anisotropy of the slope soil. This study considers five variables that affect the bearing capacity: the normalized foundation setback (L/B), load angle (θ), strength ratio (suc/γB), heterogeneous index (ρB/suc), and anisotropy rati

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Fadhel, Ali M., Tianshou Ma, and Haonan Wang. "Experimental Investigation on the Tensile Mechanical Behavior of Layered Shale Using Direct and Indirect Test Methods." Applied Sciences 15, no. 5 (2025): 2669. https://doi.org/10.3390/app15052669.

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An accurate understanding of the tensile mechanical behavior of shale rock is essential for optimizing shale gas drilling and hydraulic fracturing operations. However, the mechanical behavior of shale is significantly influenced by its anisotropy. Therefore, this study investigated the tensile mechanical behavior of layered shale by combining acoustic emission (AE) monitoring with two testing methods: the Brazilian splitting test (BST) and a novel direct tensile test (DTT). The impact of anisotropy on the tensile mechanical behavior and failure modes of layered shale under different test metho

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Gao, Min, Bin Gong, Zhengzhao Liang, Shanpo Jia, and Xianhui Feng. "Study of shear resistance and anisotropy of layered shales." PLOS ONE 19, no. 12 (2024): e0313134. https://doi.org/10.1371/journal.pone.0313134.

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Characterizing anisotropy remains challenging in rock mechanics. Particularly, the strengths and failure patterns of layered shales under shear load are significantly anisotropic mainly because of the bedding planes. Meanwhile, understanding the creation and propagation of shear fractures is critical for drilling, mining, tunnelling, exploitation of shale gas, etc. In this study, the shear resistance of layered shales is comprehensively investigated based on the direct shear tests numerically. The results show that the shear parameters are greatly affected by the anisotropy induced by the norm

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Skulanova, N. S., T. I. Polyakova, S. A. Golaido, V. G. Suchkov, A. I. Korotkova, and A. A. Zotikov. "Anisotropy of Thread Strength." Fibre Chemistry 53, no. 1 (2021): 25–29. http://dx.doi.org/10.1007/s10692-021-10233-x.

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Mehta, PK, and AM Leshchinsky. "Anisotropy of Concrete Strength." Cement, Concrete and Aggregates 12, no. 2 (1990): 117. http://dx.doi.org/10.1520/cca10280j.

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Kušnír, Jakub, Tomáš Grabec, Kristýna Zoubková, Pavla Stoklasová, Petr Sedlák, and Hanuš Seiner. "Apparent anisotropic thermal diffusivity measured in cubic single crystals by transient grating spectroscopy." Journal of Applied Physics 133, no. 12 (2023): 125108. http://dx.doi.org/10.1063/5.0136850.

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The effect of elastic anisotropy on thermal diffusivity determination by transient grating spectroscopy (TGS) was studied. In experiments performed on a set of cubic single crystals, it was observed that TGS measurements may indicate anisotropy of thermal diffusivity in otherwise thermally isotropic materials, and that the strength of this apparent anisotropy is correlated with the strength of the elastic anisotropy. To find a source of the observed phenomenon, finite-element simulations of the TGS measurements were carried out. Time-domain TGS signals were generated from the simulations and p

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Hwang, Jeaan, Mandar Dewoolkar, and Hon-Yim Ko. "Stability analysis of two-dimensional excavated slopes considering strength anisotropy." Canadian Geotechnical Journal 39, no. 5 (2002): 1026–38. http://dx.doi.org/10.1139/t02-057.

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Using the finite element method, a cohesive horizontal ground is sequentially excavated until the stress state along a potential slip surface of the excavated slope reaches the critical state. Mobilized friction angle and stress ratio contours in the slope generated by the finite element solution are examined to quantify the part of the slip surface that undergoes extension resulting in anisotropic conditions. The effects of factors such as excavation depths, drainage boundary conditions, slope angles, and initial stress conditions on slope stability are investigated. It is shown that excavate

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Zhang, Jun, Mingchang Ji, Yafei Jia, et al. "Anisotropic Shear Strength Behavior of Soil–Geogrid Interfaces." Applied Sciences 11, no. 23 (2021): 11387. http://dx.doi.org/10.3390/app112311387.

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This paper presents an experimental study on the anisotropic shear strength behavior of soil–geogrid interfaces. A new type of interface shear test device was developed, and a series of soil–geogrid interface shear tests were conducted for three different biaxial geogrids and three different triaxial geogrids under the shear directions of 0°, 45° and 90°. Clean fine sand, coarse sand, and gravel were selected as the testing materials to investigate the influence of particle size. The experimental results for the interface shear strength behavior, and the influences of shear direction and parti

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Ashour, Hamdy A. "A compressive strength criterion for anisotropic rock materials." Canadian Geotechnical Journal 25, no. 2 (1988): 233–37. http://dx.doi.org/10.1139/t88-027.

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This paper proposes a general compressive strength criterion for anisotropic rock materials under multiaxial states of stress. The proposed criterion is a generalization of the Von Mises' criterion for yielding of ductile metals, which has also been used previously as a strength criterion for brittle fracture in the spirit of both being limits of linear elastic behavior. The presently proposed criterion takes into consideration the effects of the confining pressure, the various stress components, and the material anisotropy on rock material failure in a multiaxial stress state. To verify the a

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Decker, Luke, and Qunshan Zhang. "Quantifying and correcting residual azimuthal anisotropic moveout in image gathers using dynamic time warping." GEOPHYSICS 85, no. 5 (2020): O71—O82. http://dx.doi.org/10.1190/geo2019-0324.1.

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We have developed a novel application of dynamic time warping (DTW) for correcting residual moveout in image gathers, enhancing seismic images, and determining azimuthal anisotropic orientation and relative intensity when moveout is caused by wave propagation through a medium possessing elliptical horizontally transverse isotropy (HTI). The method functions by first using DTW to determine the sequences of integer shifts that most closely match seismic traces within an image gather to its stack and then applying those shifts to flatten the gather. Flattening shifts are fitted to an ellipse to p

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Zdravkovic, Lidija, and Richard J. Jardine. "Undrained anisotropy of K0-consolidated silt." Canadian Geotechnical Journal 37, no. 1 (2000): 178–200. http://dx.doi.org/10.1139/t99-094.

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Direct measurements of the initial shear strength and yielding anisotropy of a dense, K0-consolidated silt are described and interpreted within a bounding-surface framework. The experiments were performed using the Imperial College large hollow cylinder apparatus, in which samples were sheared undrained with a range of orientations, α, of the major principal stress, σ1, following initial K0 consolidation. The interpretation is aided by data from oedometer and triaxial stress path tests. Strongly anisotropic stiffness, yielding, undrained strength, and mobilized angle of shearing resistance, ϕ'

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Vavryčuk, Václav. "Weak anisotropy-attenuation parameters." GEOPHYSICS 74, no. 5 (2009): WB203—WB213. http://dx.doi.org/10.1190/1.3173154.

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Velocity anisotropy and attenuation in weakly anisotropic and weakly attenuating structures can be treated uniformly using weak anisotropy-attenuation (WAA) parameters. The WAA parameters are constructed in a way analogous to weak anisotropy (WA) parameters designed for weak elastic anisotropy. The WAA parameters generalize WA parameters by incorporating attenuation effects. They can be represented alternatively by one set of complex values or by two sets of real values. Assuming high-frequency waves and using the first-order perturbation theory, all basic wave quantities such as the slowness

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Jayahari, L., K. Nagachary, Chandra Ch Sharath, and SM Hussaini. "Anisotropy Study of Inconel 718 alloy at Sub-Zero temperatures." E3S Web of Conferences 184 (2020): 01004. http://dx.doi.org/10.1051/e3sconf/202018401004.

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There is an increase in demand for new alloys in aerospace, power generation and nuclear industries. Nickel Based super alloys are known for having distinctive properties which are best suitable for these industries. In this study Nickel based super alloy Inconel 718, is used. Over the many years of intense research and development, these alloys have seen considerable evolution in their properties and efficiency. Behaviour of materials and its forming characteristics can be precisely analysed by determining anisotropic behaviour and mechanical properties. In the present study, tried to analyse

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Deb, Debabrata, Banibrata Mukhopadhyay, and Fridolin Weber. "Effects of Anisotropy on Strongly Magnetized Neutron and Strange Quark Stars in General Relativity." Astrophysical Journal 922, no. 2 (2021): 149. http://dx.doi.org/10.3847/1538-4357/ac222a.

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Abstract We investigate the properties of anisotropic, spherically symmetric compact stars, especially neutron stars (NSs) and strange quark stars (SQSs), made of strongly magnetized matter. The NSs are described by the SLy equation of state (EOS) and the SQSs by an EOS based on the MIT Bag model. The stellar models are based on an a priori assumed density dependence of the magnetic field and thus anisotropy. Our study shows that not only the presence of a strong magnetic field and anisotropy, but also the orientation of the magnetic field itself, have an important influence on the physical pr

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Huang, Tao, Zhuo Song, Fuxiao Chen, et al. "Influence of the Anisotropy on the Microstructure and Mechanical Properties of Ti/Al Laminated Composites." Materials 13, no. 16 (2020): 3556. http://dx.doi.org/10.3390/ma13163556.

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Anisotropy is the difference in the microstructure or mechanical properties of materials in different directions. Anisotropic behavior occurs in rolled sheets, and this anisotropy is very obvious in laminated composites. In this work, the influence of anisotropy on the microstructure and mechanical properties of Ti/Al laminated composites fabricated by rolling was investigated. The results show that the microstructure and mechanical properties of the Ti/Al laminated composites were obviously anisotropic. The grains in the Al layer of the composites were elongated along the rolling direction an

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Li, Li, and Michel Aubertin. "A crack-induced stress approach to describe the tensile strength of transversely isotropic rocks." Canadian Geotechnical Journal 39, no. 1 (2002): 1–13. http://dx.doi.org/10.1139/t01-069.

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Rocks are generally more or less anisotropic, depending on their structure at the scale of interest. In engineering applications, the magnitude of such anisotropy must often be determined for compressive as well as tensile loading conditions. In this paper, the authors present the results of an investigation on tensile failure of transversely isotropic rocks, based on Inglis' analytical solution for the stress at the boundary of an elliptical flaw. The strength of transversely isotropic rocks is assumed to be controlled by the maximum tensile local stress along the crack boundary. Equations ar

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Guo, Shao Hua. "The Shear Failure Modes and Anisotropy Based on the Shear Strength Theory in Classical Solid Mechanics." Applied Mechanics and Materials 387 (August 2013): 164–67. http://dx.doi.org/10.4028/www.scientific.net/amm.387.164.

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The shear failure modes of anisotropic solids are studied here based on the elastic standard space of physical presentation, some new shear failure phenomena for anisotropic solids are presented. The relations between shear failure modes and anisotropy are discussed. The results show that there are obvious differences in shear failure modes for different anisotropic solids.

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Hong, Zhipeng, Wei Hao, Liang He, Yinuo Zhang, and Zhaoyu Wen. "Analysis of Rock Friction Coefficient Characteristics Based on Friction Experimental Equipment." Rock Mechanics Letters 2, no. 2 (2025): 110–20. https://doi.org/10.70425/rml.202502.15.

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Friction coefficient, as a parameter of mechanical state, plays a crucial role in the shear failure of rocks in the field of Earth sciences. This paper investigates the frictional characteristics and anisotropy of rock by analyzing the coefficient of variation of the friction coefficient (f) and the anisotropy index of rock friction coefficients Af. Rotational friction tests were conducted using cylindrical granite against square samples of granite, sandstone, and andesite in three directions to analyze the relationship between the friction coefficient and various drilling parameters. This stu

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42

Shohda, Ahmed M., Waleed M. Draz, Faisal A. Ali, Mohamed A. Yassien, and Mahrous Ali Mohamed Ali. "INVESTIGATING THE ANISOTROPY STRENGTH INDEX (ASI) FOR SOME EGYPTIAN ORNAMENTAL STONES." Rudarsko-geološko-naftni zbornik 38, no. 1 (2023): 41–48. http://dx.doi.org/10.17794/rgn.2023.1.4.

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The nature of ornamental stones is anisotropic. The heterogeneous characteristics of the anisotropic rocks vary with direction. The highest to lowest strength ratio is known as the anisotropy strength index (ASI). A thorough investigation of the ASI is necessary to determine the best-directed loads for these rocks. On core specimens that have been bored parallel and perpendicular to the weakness planes, this is estimated using both uniaxial compression and point load testing. For this examination, four different rock types had cores that were drilled conventionally and in line with weakness pl

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Feng, Zequn, Haijun Pan, Wangping Wu, Zhizhi Wang, and Peng Jiang. "Impact of Heat Treatment and Building Direction on Selective Laser-Melted 316L Stainless Steel: Microstructure and Mechanical Properties." Materials 18, no. 1 (2024): 32. https://doi.org/10.3390/ma18010032.

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Variations in the microstructural morphology with building direction during selective laser melting (SLM) result in the anisotropic mechanical properties of the specimens, while heat treatment effectively reduces this anisotropy. The degree of anisotropy of the material can be assessed by calculating the variance (σ) of the mechanical properties (strength, hardness) at different building directions at different temperatures. In this work, the effects of heat treatment temperatures (450°, 750 °C, and 1050 °C) and building directions (0°, 45°, 60°, and 90°) on the microstructure, hardness, and t

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Debih, Ali. "In-Plane Anisotropy of thermomechanical properties of as-rolled AA2014 T6 aluminum alloy plate." STUDIES IN ENGINEERING AND EXACT SCIENCES 5, no. 3 (2024): e12789. https://doi.org/10.54021/seesv5n3-078.

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This work investigates the evolution of In-Plan Anisotropy during tensile testing and coefficient of thermal expansion measuring of a hot- rolled plate produced from 2014 aluminum alloy treated to T6 condition. These tests were carried out at 0°, 45°, and 90° with respect to the rolling direction, checked, and realized in order to investigate the effect of orientation on its in-plane anisotropic behavior. Results showed that the tensile orientation has an important effect on elongation and stress hardening capacity as compared to the limited effect on yield strength and ultimate strength of th

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Abrashkevych, Yurii, Hryhorii Machyshyn, Oleksandr Marchenko, Maksym Balaka, and Olena Zhukova. "Mechanical strength increasing of abrasive reinforced wheel." Strength of Materials and Theory of Structures, no. 108 (May 30, 2022): 295–308. http://dx.doi.org/10.32347/2410-2547.2022.108.295-308.

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The mechanical strength of unreinforced abrasive wheels is determined by centrifugal and bending forces, but their distribution during reinforcement is unknown. It was assumed that the stresses are distributed evenly, but a comparison of calculations on the theory of elasticity and real characteristics on a special stand showed complete discrepancy. Tensile tests of the wheels made it possible to compare the stresses results in the circumferential and radial directions. Was found that the reinforced wheel is an anisotropic body. Anisotropy can be reduced by displacing one reinforcement mesh re

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Zhang, Hui, Fang Jun Ou, Guo Qing Yin, et al. "Research on Wellbore Stability in Formation with Anisotropic Strength." Advanced Materials Research 765-767 (September 2013): 3151–57. http://dx.doi.org/10.4028/www.scientific.net/amr.765-767.3151.

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As most of sedimentary rocks are anisotropic, it is significant to research the impact of the anisotropy of strength on wellbore stability in drilling engineering. Particularly, in the Kuqa piedmont exploration area, the anisotropy of strength caused by various jointed surfaces, fracture surfaces and fault planes in formation cause the formation of several groups of weak low-intensity planes traversing borehole . These weak planes will become failure earlier than the rock body in the context of strong stress and high pore pressure, causing chipping, breakouts and sticking. If fractures have go

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Pan, Ning, and Xiaoshan Zhang. "Shear Strength of Fibrous Sheets: An Experimental Investigation." Textile Research Journal 67, no. 8 (1997): 593–600. http://dx.doi.org/10.1177/004051759706700807.

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This study of the shear strength of fibrous sheets first measures the in-plane shear strengths of various samples, including woven and nonwoven fabrics and paper, using a custom-made apparatus attached to an Instron tester. The structure of the apparatus and the measurement procedures are introduced in this article. The tested shear strength values are then compared with theoretical predictions from an earlier work. Discrepancies and possible causes are analyzed. Load-elongation curves for both tensile and shear are compared for individual fabrics and between fabrics. The relationship between

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Dai, Chunquan, Hongtao Sui, and Chao Ma. "Study on the Ultimate Supporting Force of Shield Excavation Face Based on Anisotropic Strength Theory." Applied Sciences 10, no. 15 (2020): 5222. http://dx.doi.org/10.3390/app10155222.

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The determination of the ultimate supporting force of the shield excavation face is an important problem to be solved in shield construction. Considering that the tunnel burial depth ratio has a significant effect on the instability mode of the excavation face, the classic “wedge-prism” limit equilibrium model is improved. Based on the rotation effect of principal stress axis, the Casagrande anisotropic strength equation is introduced into the modified limit equilibrium model of “wedge-prism”, and then the limit equilibrium solution of the ultimate supporting force of shield excavation face in

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Glukhikh, Vladimir. "PROBLEM OF THE ANISOTROPY OF ELASTICITY AND STRENGTH IN ANISOTROPIC FIBER MATERIALS." Architecture and Engineering 6, no. 2 (2021): 31–36. http://dx.doi.org/10.23968/2500-0055-2021-6-2-31-36.

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Introduction: The paper presents new results of studies on the anisotropy of fiber materials with cylindrical anisotropy, which include filament-wound composite materials reinforced with various fibers. Methods: We suggest a mathematical solution to a fourth-order partial differential equation in polar coordinates with two variables for an orthotropic anisotropic body. To solve this equation, we converted it into Cartesian coordinates and presented the stress function as a sum of polynomials. Results and Discussion: As a result of the solution, we obtained two relationships between the elastic

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Li, Qineng, Ke Li, and Wuhua Yuan. "In Situ Investigation of the Mechanical Property Anisotropy of TC11 Forgings Through Electron Backscatter Diffraction." Materials 18, no. 10 (2025): 2384. https://doi.org/10.3390/ma18102384.

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Electron backscatter diffraction and scanning electron microscopy were performed herein to in situ investigate the influence of texture on the anisotropic deformation mechanism of TC11 forged components. The in situ tensile specimen was cut from the TC11 ring forging, and the tensile force–displacement curve was recorded while the slip lines in the specimen surface detected was traced during the in situ tensile test. The tensile results show that the yield and ultimate tensile strengths decreased in the order of transverse-direction (TD) > rolling-direction (RD) > normal-direction (ND) s

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