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Journal articles on the topic 'Orthotropic Elastic Moduli'

Author: Grafiati
Published: 6 September 2023
Last updated: 31 July 2025

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1

SOFIYEV, A. H., E. SCHNACK, V. C. HACIYEV, and N. KURUOGLU. "EFFECT OF THE TWO-PARAMETER ELASTIC FOUNDATION ON THE CRITICAL PARAMETERS OF NONHOMOGENEOUS ORTHOTROPIC SHELLS." International Journal of Structural Stability and Dynamics 12, no. 05 (2012): 1250041. http://dx.doi.org/10.1142/s0219455412500411.

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A theoretical analysis is presented for determining the free vibrational and buckling characteristics of the nonhomogeneous, orthotropic, thin-walled, circular cylindrical and conical shells under a hydrostatic pressure and resting on a two-parameter elastic foundation. The basic relations have been obtained for the orthotropic truncated conical shell, the Young's moduli and density of which vary continuously in the thickness direction. By applying the Galerkin method, the buckling hydrostatic pressure and dimensionless frequency parameter of the homogeneous and nonhomogeneous orthotropic trun
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2

Diaco, Marina. "On Torsion of Functionally Graded Elastic Beams." Modelling and Simulation in Engineering 2016 (2016): 1–7. http://dx.doi.org/10.1155/2016/8464205.

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The evaluation of tangential stress fields in linearly elastic orthotropic Saint-Venant beams under torsion is based on the solution of Neumann and Dirichlet boundary value problems for the cross-sectional warping and for Prandtl stress function, respectively. A skillful solution method has been recently proposed by Ecsedi for a class of inhomogeneous beams with shear moduli defined in terms of Prandtl stress function of corresponding homogeneous beams. An alternative reasoning is followed in the present paper for orthotropic functionally graded beams with shear moduli tensors defined in terms
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3

Turner, C. H., and S. C. Cowin. "Errors Induced by Off-Axis Measurement of the Elastic Properties of Bone." Journal of Biomechanical Engineering 110, no. 3 (1988): 213–15. http://dx.doi.org/10.1115/1.3108433.

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Misalignment between the axes of measurement and the material symmetry axes of bone causes error in anisotropic elastic property measurements. Measurements of Poisson’s ratio were strongly affected by misalignment errors. The mean errors in the measured Young’s moduli were 9.5 and 1.3 percent for cancellous and cortical bone, respectively, at a misalignment angle of 10 degrees. Mean errors of 1.1 and 5.0 percent in the measured shear moduli for cancellous and cortical bone, respectively, were found at a misalignment angle of 10 degrees. Although, cancellous bone tissue was assumed to have orth
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4

Subhani, Mahbube, Jian Chun Li, Hauke Gravenkamp, and Bijan Samali. "Effect of Elastic Modulus and Poisson's Ratio on Guided Wave Dispersion Using Transversely Isotropic Material Modelling." Advanced Materials Research 778 (September 2013): 303–11. http://dx.doi.org/10.4028/www.scientific.net/amr.778.303.

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Timber poles are commonly used for telecommunication and power distribution networks, wharves or jetties, piling or as a substructure of short span bridges. Most of the available techniques currently used for non-destructive testing (NDT) of timber structures are based on one-dimensional wave theory. If it is essential to detect small sized damage, it becomes necessary to consider guided wave (GW) propagation as the behaviour of different propagating modes cannot be represented by one-dimensional approximations. However, due to the orthotropic material properties of timber, the modelling of gu
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5

Vorobyev, Alexey, Olivier Arnould, Didier Laux, Roberto Longo, Nico P. van Dijk, and E. Kristofer Gamstedt. "Characterisation of cubic oak specimens from the Vasa ship and recent wood by means of quasi-static loading and resonance ultrasound spectroscopy (RUS)." Holzforschung 70, no. 5 (2016): 457–65. http://dx.doi.org/10.1515/hf-2015-0073.

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Abstract The cylindrical orthotropy, inherent time-dependency response, and variation between and within samples make the stiffness characterisation of wood more challenging than most other structural materials. The purpose of the present study is to compare static loading with resonant ultrasound spectroscopy (RUS) and to investigate how to combine the advantages of each of these two methods to improve the estimation of the full set of elastic parameters of a unique sample. The behavior of wood as an orthotropic mechanical material was quantified by elastic engineering parameters, i.e. Poisso
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Adibaskoro, Tito, Michalina Makowska, Aleksi Rinta-Paavola, Stefania Fortino, and Simo Hostikka. "Elastic Modulus, Thermal Expansion, and Pyrolysis Shrinkage of Norway Spruce Under High Temperature." Fire Technology 57, no. 5 (2021): 2451–90. http://dx.doi.org/10.1007/s10694-021-01123-z.

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AbstractThe orthotropic and temperature-dependent nature of the mechanical properties of wood is well recognized. However, past studies of mechanical properties at elevated temperatures are either limited to temperatures below 200 °C or focus only on the direction parallel to grain. The effect of time-dependent pyrolysis during measurement is often neglected. This paper presents a novel method for determining elastic modulus at high temperatures and thermal expansion coefficient in different orthotropic directions via Dynamic Mechanical-Thermal Analyser (DMTA). The method allows for drying, dr
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7

Ozyhar, Tomasz, Stefan Hering, and Peter Niemz. "Moisture-dependent orthotropic tension-compression asymmetry of wood." Holzforschung 67, no. 4 (2013): 395–404. http://dx.doi.org/10.1515/hf-2012-0089.

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Abstract The influence of moisture content (MC) on the tension-compression (Te-Co) asymmetry of beech wood has been examined. The elastic and strength parameters, including Te and Co Young’s moduli, Poisson’s ratios, and ultimate and yield stress values, were determined and compared in terms of different MCs for all orthotropic directions. The results reveal a distinctive Te-Co strength asymmetry with a moisture dependency that is visualized clearly by the Te to Co yield stress ratio. The Te-Co asymmetry is further shown by the inequality of the elastic properties, known as the “bimodular beha
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8

Tokovyy, Yuriy V., Anatoliy V. Yasinskyy, Sebastian Lubowicki, and Dariusz M. Perkowski. "Elastic and Thermoelastic Responses of Orthotropic Half-Planes." Materials 15, no. 1 (2021): 297. http://dx.doi.org/10.3390/ma15010297.

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A unified approach is presented for constructing explicit solutions to the plane elasticity and thermoelasticity problems for orthotropic half-planes. The solutions are constructed in forms which decrease the distance from the loaded segments of the boundary for any feasible relationship between the elastic moduli of orthotropic materials. For the construction, the direct integration method was employed to reduce the formulated problems to a governing equation for a key function. In turn, the governing equation was reduced to an integral equation of the second kind, whose explicit analytical s
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9

Zhao, Aihong, and Jilin Yu. "The overall elastic moduli of orthotropic composite and description of orthotropic damage of materials." International Journal of Solids and Structures 37, no. 45 (2000): 6755–71. http://dx.doi.org/10.1016/s0020-7683(99)00226-7.

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10

Zhao, Y. H., and G. J. Weng. "Effective Elastic Moduli of Ribbon-Reinforced Composites." Journal of Applied Mechanics 57, no. 1 (1990): 158–67. http://dx.doi.org/10.1115/1.2888297.

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Based on the Eshelby-Mori-Tanaka theory the nine effective elastic constants of an orthotropic composite reinforced with monotonically aligned elliptic cylinders, and the five elastic moduli of a transversely isotropic composite reinforced with two-dimensional randomly-oriented elliptic cylinders, are derived. These moduli are given in terms of the cross-sectional aspect ratio and the volume fraction of the elliptic cylinders. When the aspect ratio approaches zero, the elliptic cylinders exist as thin ribbons, and these moduli are given in very simple, explicit forms as a function of volume fr
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11

Chen, Tungyang, George J. Dvorak, and Yakov Benveniste. "Mori-Tanaka Estimates of the Overall Elastic Moduli of Certain Composite Materials." Journal of Applied Mechanics 59, no. 3 (1992): 539–46. http://dx.doi.org/10.1115/1.2893757.

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Simple, explicit formulae are derived for estimates of the effective elastic moduli of several multiphase composite materials with the Mori-Tanaka method. Specific results are given for composites reinforced by aligned or randomly oriented, transversely isotropic fibers or platelets, and for fibrous systems reinforced by aligned, cylindrically orthotropic fibers.
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12

Gotkhindi, Tejas P., and K. R. Y. Simha. "Transverse orthotropic elastic moduli of bundled coated thin elliptical tubes." Composite Structures 118 (December 2014): 178–99. http://dx.doi.org/10.1016/j.compstruct.2014.07.030.

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13

Wang, Linje, Carlo Meloro, Michael J. Fagan, et al. "Regional variation of the cortical and trabecular bone material properties in the rabbit skull." PLOS ONE 19, no. 2 (2024): e0298621. http://dx.doi.org/10.1371/journal.pone.0298621.

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The material properties of some bones are known to vary with anatomical location, orientation and position within the bone (e.g., cortical and trabecular bone). Details of the heterogeneity and anisotropy of bone is an important consideration for biomechanical studies that apply techniques such as finite element analysis, as the outcomes will be influenced by the choice of material properties used. Datasets detailing the regional variation of material properties in the bones of the skull are sparse, leaving many finite element analyses of skulls no choice but to employ homogeneous, isotropic m
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14

Saito, Akira, Yasunari Nishikawa, Shintaro Yamasaki, et al. "Equivalent orthotropic elastic moduli identification method for laminated electrical steel sheets." Mechanical Systems and Signal Processing 72-73 (May 2016): 607–28. http://dx.doi.org/10.1016/j.ymssp.2015.10.027.

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15

Ashman, R. B., J. Y. Rho, and C. H. Turner. "Anatomical variation of orthotropic elastic moduli of the proximal human tibia." Journal of Biomechanics 22, no. 8-9 (1989): 895–900. http://dx.doi.org/10.1016/0021-9290(89)90073-0.

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16

Pao, Yih-Hsing, Tsung-Tsong Wu, and Udo Gamer. "Acoustoelastic Birefringences in Plastically Deformed Solids: Part I—Theory." Journal of Applied Mechanics 58, no. 1 (1991): 11–17. http://dx.doi.org/10.1115/1.2897137.

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A modified theory of acoustoelasticity is proposed to include the effect of small plastic deformation on propagational speeds of elastic waves in orthotropic media. In the constitutive equation for the incremental stresses of a predeformed body, the elastic moduli are modified by elastic deformation and plastic strains. The latter is related to the texture of the material. Several formulae for the acoustoelastic birefringences (differences of two shear wave speeds polarized at perpendicular directions) are derived. They can be applied to measure residual stresses and plastic strains by ultraso
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17

Clauß, Sebastian, Corina Pescatore, and Peter Niemz. "Anisotropic elastic properties of common ash (Fraxinus excelsior L.)." Holzforschung 68, no. 8 (2014): 941–49. http://dx.doi.org/10.1515/hf-2013-0189.

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Abstract Hardwoods in principle show a similar orthotropic behavior as softwoods; however, the ratios of the mechanical parameters between the three anatomical directions and their magnitudes are different and depend strongly on the individual microstructure of the species. The aim of the current study was to characterize the 3-D elastic behavior of common ash (Fraxinus excelsior L.) by tensile, compression, and shear tests in the three anatomical directions and stepwise in between, by means of a universal testing machine in combination with a digital image correlation technique. Young’s modul
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18

Saito, Akira, Atsushi Kawamoto, Masakatsu Kuroishi, Hideo Nakai, and Shintaro Yamasaki. "Estimation of measurement errors in orthotropic elastic moduli determined from natural frequencies." Structural and Multidisciplinary Optimization 55, no. 3 (2016): 987–99. http://dx.doi.org/10.1007/s00158-016-1552-9.

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19

Mazumder, Dibbyan, Gurudas Kar, Ram Mohan Vasu, Debasish Roy, and Rajan Kanhirodan. "Orthotropic elastic moduli of biological tissues from ultrasound-assisted diffusing-wave spectroscopy." Journal of the Optical Society of America A 34, no. 11 (2017): 1945. http://dx.doi.org/10.1364/josaa.34.001945.

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20

Lipton, Rob, and Jim Northrup. "Optimal Bounds on the in-Plane Shear Moduli for Orthotropic Elastic Composites." SIAM Journal on Applied Mathematics 54, no. 2 (1994): 428–42. http://dx.doi.org/10.1137/s0036139992235986.

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21

Lubarda, Vlado, and Michelle Chen. "On the elastic moduli and compliances of transversely isotropic and orthotropic materials." Journal of Mechanics of Materials and Structures 3, no. 1 (2008): 153–71. http://dx.doi.org/10.2140/jomms.2008.3.153.

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22

Zeng, Jiaqi, Yaolu Liu, Youqiang Jiang, Yunlin Wang, and Ning Hu. "Equivalent tensile elastic modulus measurement of cross-ply composite plates using S1 mode of Lamb wave." Journal of Physics: Conference Series 2822, no. 1 (2024): 012114. http://dx.doi.org/10.1088/1742-6596/2822/1/012114.

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Abstract This paper proposes a simple and effective Lamb wave-based measurement method for the elastic moduli of cross-ply composite plates with large thickness, considered equivalent to a single-layer orthotropic plate with nine independent elastic constants. Due to the low-frequency signals required for measuring large thickness plates and the large wavelength of the low-frequency signals, the size of composite plates is highly required. Therefore, it is considered to use the first order symmetric (S1) mode wave to increase the signal frequency and reduce the wavelength. The effects of elast
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23

Bacigalupo, Andrea, and Luigi Gambarotta. "Micro-Polar and Second Order Homogenization of Periodic Masonry." Materials Science Forum 638-642 (January 2010): 2561–66. http://dx.doi.org/10.4028/www.scientific.net/msf.638-642.2561.

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Micro-polar and second order homogenization procedures for periodic elastic masonry are implemented to include geometric and material length scales in the constitutive equation. By the solution of the RVE equilibrium problems with properly prescribed boundary conditions the orthotropic elastic moduli of the higher order continua are obtained on the basis of an enhanced Hill–Mandel condition. A shear layer problem is analysed and the results from the heterogeneous models are compared with those ones obtained by the homogenization procedures; the second-order homogenization appears to provide be
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24

Sofiyev, A. H., S. N. Keskin, and Ali H. Sofiyev. "Effects of Elastic Foundation on the Vibration of Laminated Non-Homogeneous Orthotropic Circular Cylindrical Shells." Shock and Vibration 11, no. 2 (2004): 89–101. http://dx.doi.org/10.1155/2004/424926.

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In this paper an analytical procedure is given to study the free vibration characteristics of laminated non-homogeneous orthotropic thin circular cylindrical shells resting on elastic foundation, accounting for Karman type geometric non-linearity. At first, the basic relations and modified Donnell type stability equations, considering finite deformations, have been obtained for laminated thin orthotropic circular cylindrical shells, the Young's moduli of which varies piecewise continuously in the thickness direction. Applying Galerkin method to the latter equations, a non-linear time dependent
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25

Ayorinde, E. O., and R. F. Gibson. "Improved Method for In-situ Elastic Constants of Isotropic and Orthotropic Composite Materials Using Plate Modal Data With Trimodal and Hexamodal Rayleigh Formulations." Journal of Vibration and Acoustics 117, no. 2 (1995): 180–86. http://dx.doi.org/10.1115/1.2873882.

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This paper relates a further development of an earlier work by the authors, in which they presented a method for deriving the four independent elastic constants (longitudinal and transverse Young’s moduli, in-plane shear modulus and major Poisson’s ratio) of an orthotropic material from resonance data obtained in a modal analysis of a freely-supported plate made out of the material. In the present work, simple averaging, as opposed to the weighted averaging employed in the earlier version, is utilized. The use of three modes and six modes is compared on the basis of results of both the forward
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26

Zhu, Xuefeng, Longkun Xu, Xiaochen Liu, Jinting Xu, Ping Hu, and Zheng-Dong Ma. "Theoretical prediction of mechanical properties of 3D printed Kagome honeycombs and its experimental evaluation." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 233, no. 18 (2019): 6559–76. http://dx.doi.org/10.1177/0954406219860538.

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Kagome honeycomb structure is proved to incorporate excellent mechanical and actuation performances due to its special configuration. However, until now, the mechanical properties of 3D printed Kagome honeycomb have not been investigated. Hence, the objective of this work is to explore some mechanical properties of 3D-printed Kagome honeycomb structures such as elastic properties, buckling, and so on. In this paper, the analytical formulas of some mechanical properties of Kagome honeycombs made of 3D-printed materials are given. Effective elastic moduli such as Young's modulus, shear modulus,
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27

Elad, D., A. Foux, and Y. Kivity. "A Model for the Nonlinear Elastic Response of Large Arteries." Journal of Biomechanical Engineering 110, no. 3 (1988): 185–89. http://dx.doi.org/10.1115/1.3108429.

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The nonlinear elastic response of large arteries subjected to finite deformations due to action of biaxial principal stresses, is described by simple constitutive equations. Generalized measures of strain and stress are introduced to account for material nonlinearity. This also ensures the existence of a strain energy density function. The orthotropic elastic response is described via quasi-linear relations between strains and stresses. One nonlinear parameter which defines the measures of strain and stress, and three elastic moduli are assumed to be constants. The lateral strain parameters (e
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28

Allam, M. N. M., R. Tantawy, A. Yousof, and A. M. Zenkour. "Elastic and Viscoelastic Stresses of Nonlinear Rotating Functionally Graded Solid and Annular Disks with Gradually Varying Thickness." Archive of Mechanical Engineering 64, no. 4 (2017): 423–40. http://dx.doi.org/10.1515/meceng-2017-0025.

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Abstract Analytical and numerical nonlinear solutions for rotating variable-thickness functionally graded solid and annular disks with viscoelastic orthotropic material properties are presented by using the method of successive approximations.Variable material properties such as Young’s moduli, density and thickness of the disk, are first introduced to obtain the governing equation. As a second step, the method of successive approximations is proposed to get the nonlinear solution of the problem. In the third step, the method of effective moduli is deduced to reduce the problem to the correspo
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29

Selivanov, M. F., Y. R. Kulbachnyy, and D. R. Onishchenko. "Determining the stress concentration change with time in a viscoelastic orthotropic solid." Reports of the National Academy of Sciences of Ukraine, no. 10 (October 2020): 28–34. http://dx.doi.org/10.15407/dopovidi2020.10.028.

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The procedure for solving the plane problem of the linear theory of viscoelasticity by the finite element method is described. Based on the virtual work principle and the assumption of the constancy of the strain rate at small intervals of time, the matrix form of the equilibrium equations of the finite-element approximation of a body is written. The solution procedure is described for the constitutive relations in the Boltzmann—Volterra integral form. This integral is transformed into an incremental form on a time mesh, at each interval of which the problem is solved by the finite element met
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30

Haciyev, Vaqif C., Gulnar R. Mirzoeva, and Matlab G. Agayarov. "Free vibrations of anisotropic rectangular plate laying on a heterogeneous viscouselastic basis." Structural Mechanics of Engineering Constructions and Buildings 15, no. 6 (2019): 470–76. http://dx.doi.org/10.22363/1815-5235-2019-15-6-470-476.

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The aim of the work. Free, transverse vibrations are considered heterogeneous along the three spatial coordinates of rectangular plates lying on an inhomogeneous viscoelastic base. It is assumed that the boundary conditions are homogeneous. A closed solution for the problem of free vibration of an inhomogeneous rectangular orthotropic plate based on an inhomogeneous viscoelastic foundation is developed in the article. Young's moduli and the density of the orthotropic plate continuously change with respect to three spatial coordinates, while the characteristics of a viscoelastic base change dep
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31

Tadmor, E. B., and D. Durban. "Plastic Deformation and Burst of Pressurized Multilayered Cylinders." Journal of Pressure Vessel Technology 117, no. 1 (1995): 85–91. http://dx.doi.org/10.1115/1.2842096.

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A large strain analysis is presented for internally pressurized multilayered tubes, in generalized plane strain. Material behavior is modeled by an elastoplastic deformation theory with an orthotropic yield function, introduced by Hill, and arbitrary hardening. Elastic compressibility is neglected. An exact solution is given, in terms of quadratures, along with a general condition for burst. Simple yet useful relations are derived for thin-walled cylinders with the neglect of elastic strains. For rigid/nonlinear-hardening response, we obtain an expression for the onset of burst in terms of ove
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32

Mate̤milo̤la, S. A., W. J. Stronge, and D. Durban. "Diffusion Rate for Stress in Orthotropic Materials." Journal of Applied Mechanics 62, no. 3 (1995): 654–61. http://dx.doi.org/10.1115/1.2895996.

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Axial rates of diffusion of the symmetrical state of stress caused by equal but opposed normal forces acting on opposite sides of an indefinitely long strip or plate, are examined in the context of orthotropic elastic materials. To obtain the stress components for this boundary value problem, the imposed surface tractions are represented by a Fourier integral. At distances larger than one quarter of the thickness, the normal stress on the middle surface is closely represented by the sum of eigenfunctions for this problem, up to, and including the first complex eigenfunction as well as its conj
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33

Formato, Andrea, Domenico Ianniello, Arcangelo Pellegrino, and Francesco Villecco. "Vibration-Based Experimental Identification of the Elastic Moduli Using Plate Specimens of the Olive Tree." Machines 7, no. 2 (2019): 46. http://dx.doi.org/10.3390/machines7020046.

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Mechanical parameters of the olive wood plate have been computed by data inversion of vibrational experimental tests. A numerical-experimental method has allowed the evaluation of the two transverse shear moduli and the four in-plane moduli of a thick orthotropic olive tree plate. Therefore, the natural flexural vibration frequencies of olive trees plates have been evaluated by the impulse technique. For our purposes, we define the objective function as the difference between the numerical computation data and the experimental ones. The Levenberg–Marquardt algorithm was chosen as optimization
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34

Paipetis, A., Y. Z. Pappas, D. E. Vlachos, and V. Kostopoulos. "Damage Modelling and Simulation of Composite Materials using Ultrasonic Measurements." Advanced Composites Letters 14, no. 3 (2005): 096369350501400. http://dx.doi.org/10.1177/096369350501400301.

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The monitoring of the elastic properties of Al2O3/Al2O3 composites during the exposure at high temperature environment that simulates the working conditions of a gas turbine has been performed non-destructively using ultrasonics. The applied methodology is based on velocity measurements of the elastic waves that propagate in an orthotropic medium. These were estimated experimentally using a custom pulser-receiver setup which allows control of the angle of the incident pulse on the sample, while the latter is immersed in a water bath. The derivation of the elastic constants in order to reproduc
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35

Moshki, Alireza, Akbar Ghazavizadeh, Ali Asghar Atai, Mostafa Baghani, and Majid Baniassadi. "3D-Printable Unit Cell Design for Cubic and Orthotropic Porous Microstructures Using Topology Optimization Based on Optimality Criteria Algorithm." International Journal of Applied Mechanics 10, no. 06 (2018): 1850060. http://dx.doi.org/10.1142/s1758825118500606.

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Optimal design of porous and periodic microstructures through topology identification of the associated periodic unit cell (PUC) constitutes the topic of this work. Here, the attention is confined to two-phase heterogeneous materials in which the topology identification of manufacturable 3D-PUC is conducted by means of a topology optimization technique. The associated objective function is coupled with 3D numerical homogenization approach that connects the elastic properties of the 3D-PUC to the target product. The topology optimization methodology that is adopted in this study is the combinat
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36

Smardzewski, Jerzy, Adam Gajęcki, and Marlena Wojnowska. "Investigation of elastic properties of paper honeycomb panels with rectangular cells." BioResources 14, no. 1 (2019): 1435–51. http://dx.doi.org/10.15376/biores.14.1.1435-1451.

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Multilayer panels that have paper cores with hexagonal cells continue to have a limited application in furniture production. In contrast, there are no sandwich honeycomb panels with cores containing rectangular cells employed in this industry. Such cores should distinguish themselves by strong orthotropic advantages, in particular, for designing shelves and partitions of cabinet furniture. Hence, the objective of this study was to determine the effect of core rectangular paper cells on the mechanical properties of three-layer furniture panels. The authors decided to ascertain relative density
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37

Leonetti, Lorenzo, Nicholas Fantuzzi, Patrizia Trovalusci, and Francesco Tornabene. "Scale Effects in Orthotropic Composite Assemblies as Micropolar Continua: A Comparison between Weak- and Strong-Form Finite Element Solutions." Materials 12, no. 5 (2019): 758. http://dx.doi.org/10.3390/ma12050758.

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The aim of the present work was to investigate the mechanical behavior of orthotropic composites, such as masonry assemblies, subjected to localized loads described as micropolar materials. Micropolar models are known to be effective in modeling the actual behavior of microstructured solids in the presence of localized loads or geometrical discontinuities. This is due to the introduction of an additional degree of freedom (the micro-rotation) in the kinematic model, if compared to the classical continuum and the related strain and stress measures. In particular, it was shown in the literature
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38

Dasgupta, A., and S. M. Bhandarkar. "Effective Thermomechanical Behavior of Plain-Weave Fabric-Reinforced Composites Using Homogenization Theory." Journal of Engineering Materials and Technology 116, no. 1 (1994): 99–105. http://dx.doi.org/10.1115/1.2904262.

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A micromechanical analysis is presented to obtain the effective macroscale orthotropic thermomechanical behavior of plain-weave fabric reinforced laminated composites based on a two-scale asymptotic homogenization theory. The model is based on the properties of the constituents and an accurate, three-dimensional simulation of the weave microarchitecture, and is used for predicting the thermomechanical behavior of glass-epoxy (FR-4) woven-fabric laminates typically used by the electronics industry in Multilayered Printed Wiring Boards (MLBs). Parametric studies are conducted to examine the effe
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39

Krüger, Robert, and André Wagenführ. "Comparison of methods for determining shear modulus of wood." European Journal of Wood and Wood Products 78, no. 6 (2020): 1087–94. http://dx.doi.org/10.1007/s00107-020-01565-2.

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Abstract In this study, the relatively new picture frame method applied to wood is compared with three established shear test methods, namely the experimental modal analysis, the square plate twist method and the torsion test. For the investigations, the wood species European beech (Fagus sylvatica L.) and spruce (Picea abies L. Karst.) were used and the shear tests were conducted in LR and RL direction. The results show comparable shear moduli for beech and spruce in the range of 931–1289 Nmm−2 and 495–842 Nmm−2, respectively. In contrast to the theory of linear elastic orthotropic materials,
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Srivastava, P. K., P. Mahajan, P. K. Satyawali, and V. Kumar. "Observation of temperature gradient metamorphism in snow by X-ray computed microtomography: measurement of microstructure parameters and simulation of linear elastic properties." Annals of Glaciology 51, no. 54 (2010): 73–82. http://dx.doi.org/10.3189/172756410791386571.

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AbstractThe process of temperature gradient metamorphism in snow strongly affects the microstructure and associated mechanical properties of the snow. The purpose of this study was to: (1) examine the temporal variations in three-dimensional snow microstructure under the influence of a strong temperature gradient for 6 days using X-ray computed microtomography (μCT); and (2) numerically simulate the linear elastic properties of snow from microtomographic data using a voxel-based finite-element technique. The temporal changes in the snow structure were analyzed in terms of density, specific sur
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Kohles, Sean S., and Julie B. Roberts. "Linear Poroelastic Cancellous Bone Anisotropy: Trabecular Solid Elastic and Fluid Transport Properties." Journal of Biomechanical Engineering 124, no. 5 (2002): 521–26. http://dx.doi.org/10.1115/1.1503374.

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The mechanical performance of cancellous bone is characterized using experiments which apply linear poroelasticity theory. It is hypothesized that the anisotropic organization of the solid and pore volumes of cancellous bone can be physically characterized separately (no deformable boundary interactive effects) within the same bone sample. Due to its spongy construction, the in vivo mechanical function of cancellous or trabecular bone is dependent upon fluid and solid materials which may interact in a hydraulic, convective fashion during functional loading. This project provides insight into t
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Savchenko, V. G. "Nonaxisymmetric Deformation of Solids of Revolution Made of Elastic Orthotropic Materials with Different Tensile and Compressive Moduli." International Applied Mechanics 41, no. 7 (2005): 748–56. http://dx.doi.org/10.1007/s10778-005-0141-1.

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Bonora, N., M. Marchetti, and P. P. Milella. "Theoretical Forecasting and Experimental Validation of Damage Tolerance and Accumulation in Glass/Epoxy Laminates." Journal of Reinforced Plastics and Composites 11, no. 1 (1992): 56–81. http://dx.doi.org/10.1177/073168449201100104.

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Damage and damage accumulation mechanisms under cyclic loads were studied in orthotropic cross-ply composite laminates realized in S-glass fibers with epoxy resin. Five different basic mechanisms of damage were observed and evaluated making use of x-ray and dye-penetrant nondestructive techniques. They are: transverse matrix cracks, fiber failure, fiber debonding, intralaminar delamination and random disperse longitudinal cracks. The effects of these different damage mechanisms are revealed through the reduction of the mechanical properties of the composite material. A comprehensive experiment
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Kryshchuk, Mykola, Egor Ovcharenko, and Hanna Us. "Determination of elastic characteristics for a package of monolayers thin-walled plates from composite fibrous materials." Mechanics and Advanced Technologies 7, no. 2 (98) (2023): 155–59. http://dx.doi.org/10.20535/2521-1943.2023.7.2.287711.

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An analytical method for calculating the equivalent elastic characteristics of anisotropic multilayer plates made of composite fibrous materials is laid out. The main assumptions taken into consideration when calculating elastic moduli and Pousson's coefficients are that fibers are elastic materials with orthotropic mechanical characteristics that deform together when multilayer plates are loaded. Analytical methods for calculating effective modulus of elasticity most common in practical applications of applied mechanics are laid out in the list of cited publications. These include the rules o
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Derevianko, I., K. Avramov, B. Uspensky, and A. Salenko. "Experimental analysis of the mechanical characteristics of launch vehicle parts manufactured by FDM additive technologies." Technical mechanics 2021, no. 1 (2021): 92–100. http://dx.doi.org/10.15407/itm2021.01.092.

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Additive manufacturing is very promising for aerospace engineering and aircraft construction. Using these technologies, light structures with preset strength properties can be made. For lack of tables of the mechanical properties of materials made by additive technologies, any calculation must be accompanied by the experimental determination of their mechanical properties. This paper presents an experimental approach to the determination of the mechanical characteristics of parts printed by FDM technologies. Parts manufactured from polymers by FDM technologies are shown to be orthotropic. Ther
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Shahsavar, Vahid Lal, and Samira Tofighi. "Uncertainties Concerning the Free Vibration of Inhomogeneous Orthotropic Reinforced Concrete Plates." Slovak Journal of Civil Engineering 22, no. 3 (2014): 21–30. http://dx.doi.org/10.2478/sjce-2014-0014.

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Abstract Analyzing nearly collapsed and broken structures gives good insights into possible architectural and engineering design mistakes and faults in the detailing and mismanagement of a construction by building contractors. Harmful vibration effects of construction operations occur frequently. The background reviews have demonstrated that the problem of the vibration serviceability of long-span concrete floors in buildings is complex and interdisciplinary in nature. In public buildings, floor vibration control is required in order to meet Serviceability Limit States that ensure the comfort
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Atreya, Nemish, Pai Wang, and Xuan Zhu. "Characterizing Mechanical Properties of Layered Engineered Wood Using Guided Waves and Genetic Algorithm." Sensors 23, no. 22 (2023): 9184. http://dx.doi.org/10.3390/s23229184.

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This study develops a framework for determining the material parameters of layered engineered wood in a nondestructive manner. The motivation lies in enhancing nondestructive evaluation (NDE) and quality assurance (QA) for engineered wood or mass timber, promising construction materials for sustainable and resilient civil structures. The study employs static compression tests, guided wave measurements, and a genetic algorithm (GA) to solve the inverse problem of determining the mechanical properties of a laminated veneer lumber (LVL) bar. Miniature LVL samples are subjected to compression test
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Aydın, Murat, and Tuğba Yılmaz Aydın. "Auxeticity and Wood." Drvna industrija 76, no. 1 (2025): 21–32. https://doi.org/10.5552/drvind.2025.0219.

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Poisson’s ratio, one of the elastic constants, describes the ratio of lateral strain to axial strain when a material is subjected to stress. The range of Poisson’s ratios greatly varies in terms of material types and their structures. Furthermore, some materials present negative Poisson’s ratios which are attributed to auxeticity. Wood material has six Poisson’s ratios corresponding to the neighboring planes of the essential axes of Longitudinal, Radial, and Tangential. Due to the polar orthotropic nature of wood, six of them are different, and generally
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Abdulhamid, Hakim, Paul Deconinck, Pierre-Louis Héreil, and Jérôme Mespoulet. "Study of the ballistic behaviour of UHMWPE composite material: experimental characterization and numerical simulation." EPJ Web of Conferences 183 (2018): 01051. http://dx.doi.org/10.1051/epjconf/201818301051.

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This paper presents a comprehensive mechanical study of UHMWPE (Ultra High Molecular Weight Polyethylene) composite material under dynamic loadings. The aim of the study is to provide reliable experimental data for building and validate the composite material model under impact. Four types of characterization tests have been conducted: dynamic in-plane tension, out-of-plane compression, shear tests and plate impact tests. Then, several impacts of spherical projectiles have been performed. Regarding the numerical simulation, an intermediate scale multi-layered model (between meso and macro scal
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Shevtsov, Sergey, Valery Chebanenko, Maria Shevtsova, Shun-Hsyung Chang, Evgenia Kirillova, and Evgeny Rozhkov. "On the Directivity of Lamb Waves Generated by Wedge PZT Actuator in Thin CFRP Panel." Materials 13, no. 4 (2020): 907. http://dx.doi.org/10.3390/ma13040907.

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This paper addresses investigation of guided-wave excitation by angle-beam wedge piezoelectric (PZT) transducers in multilayered composite plate structure with orthotropic symmetry of the material. The aim of the present study is to determine the capability of such actuators to provide the controlled generation of an acoustic wave of a desirable type with the necessary wavelength, propagation distance and directivity. The studied CFRP (Carbon Fiber Reinforced Plastic) panel is considered to be homogenous, with effective elastic moduli and anisotropic structural damping, whose parameters were d
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