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Artykuły w czasopismach na temat „Θ"/θ' plates”

Autor: Grafiati

Data publikacji: 6 września 2023

Data aktualizacji: 31 lipca 2025

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1

Ouinas, Djamel, та Belkacem Achour. "Buckling analysis of laminated composite plates [(θ/−θ)] containing an elliptical notch". Composites Part B: Engineering 55 (грудень 2013): 575–79. http://dx.doi.org/10.1016/j.compositesb.2013.07.011.

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2

Hamani, N., D. Ouinas, N. Taghezout, M. Sahnoun, and J. Viña. "Effect of Fiber Orientation on the Critical Buckling Load of Symmetric Composite Laminated Plates." Advanced Materials Research 629 (December 2012): 95–99. http://dx.doi.org/10.4028/www.scientific.net/amr.629.95.

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In this study, a buckling analysis is performed on rectangular composite plates with single and double circular notch using the finite element method. Laminated plates of carbon/bismaleimde (IM7/5250-4) are ordered symmetrically as follows [(θ/-θ)2]S. The buckling strength of symmetric laminated plates subjected to uniaxial compression is highlighted as a function of the fibers orientations. The results show that whatever the notch radius, the buckling load is almost stable. Increasing the degree of anisotropy significantly improves critical buckling load.

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3

Wang, Q. W., W. Q. Tao, Z. Lin, and T. T. Chow. "An Experimental Investigation of Natural Convection in a Cubic Inclined Enclosure With Multiple Isolated Plates." Journal of Heat Transfer 122, no. 1 (1999): 176–79. http://dx.doi.org/10.1115/1.521452.

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Natural convection in a cubic inclined enclosure with three isolated plates was investigated experimentally. The influences of the plates’ spacing, the inclination angles of the enclosure, and the Rayleigh number on the heat transfer of the plate group were obtained. It was found that under a fixed Rayleigh number, there is a plate spacing at which the heat transfer rate of the three plates is approximately the same for the horizontal plate group. Under the range of Rayleigh numbers considered, the heat transfer rate of the plate group is less than that of the natural convection of the plate g

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4

Oshima, Nagayasu, Y. Iwai, T. M. Kojima, et al. "Guiding of a Slow Positron Beam with a Glass Capillary." Materials Science Forum 607 (November 2008): 263–65. http://dx.doi.org/10.4028/www.scientific.net/msf.607.263.

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Slow positron beam was injected into a non-tapered glass capillary which was tilted angle of θ from the beam axis by a movable stage. Beam profiles of the positrons transported through the capillary were observed with a phosphor screen combined with micro channel plates as a function of θ. Some fraction of positrons was deflected with the tilting angle of the capillary.

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5

Hamani, N., Djamel Ouinas, N. Benderdouche, and Mohamed Sahnoun. "Buckling Analyses of the Antisymetrical Composite Laminate Plate with a Crack from Circular Notch." Advanced Materials Research 365 (October 2011): 56–61. http://dx.doi.org/10.4028/www.scientific.net/amr.365.56.

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In this study, an analysis of buckling was carried out on composite rectangular plates with and without circular notch by using the finite element method. The graphite/epoxy laminated plates were arranged antisymmetrically in the following ordered way [(θ/-θ)2]s. The buckling strength of the asymmetrical laminated plates subjected to uniaxial load is determined as a function of fiber orientation. The results show that whatever the notch radius, the buckling load is almost stable. The cumulated effect due to the presence of the longitudinal and transverse cracks as well as a circular notch redu

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6

Ono, Yuzo, та Nobuo Nishida. "Holographic zone plates for f · θ and collimating lenses". Applied Optics 25, № 5 (1986): 794. http://dx.doi.org/10.1364/ao.25.000794.

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7

Wang, X., H. Ma, X. Bao, Y. Cen, and B. Wang. "Micro‐alloying effects of lanthanum in thermo‐mechanical control process of manganese‐chromium‐molybdenum bainite rail steel." Materialwissenschaft und Werkstofftechnik 55, no. 6 (2024): 783–91. http://dx.doi.org/10.1002/mawe.202300116.

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AbstractMicro‐alloying effects of lanthanum in thermo‐mechanical control process of manganese‐chromium‐molybdenum bainite rail steel are investigated through experimental simulation and microstructural characterization. The results show that the deformation strengthening effect is fully exerted by thermo‐mechanical control process in steel containing 0.015 % lanthanum. Finally a kind of multi‐layer bainite ferrite microstructure featured by 3.5 μm blocks, 0.41 μm plates and 108 nm sub‐plates with ultrafine sub‐subunits and 55 nm θ‐M3C inside is achieved, which enhances the strength and toughne

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8

Fang, Xueqian, Chao Hu, and Wenhu Huang. "Dynamic Stress Concentration of a Circular Cutout Buried in Semi-Infinite Plates Subjected to Flexural Waves." Journal of Applied Mechanics 74, no. 2 (2006): 382–87. http://dx.doi.org/10.1115/1.2198545.

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In this paper, based on the theory of elastic thin plates, applying the image method and the wave function expansion method, multiple scattering of elastic waves and dynamic stress concentration in semi-infinite plates with a circular cutout are investigated, and the general solutions of this problem are obtained. As an example, the numerical results of dynamic stress concentration factors are graphically presented and discussed. Numerical results show that the analytical results of scattered waves and dynamic stress in semi-infinite plates are different from those in infinite plates when the

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9

Ould Hamouda, Sara, Nabil Kazi Tani, and Tawfik Tamine. "Numerical buckling analysis of cracked Bi-material thin plates." Advances in Mechanical Engineering 12, no. 7 (2020): 168781402094464. http://dx.doi.org/10.1177/1687814020944646.

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The aim of this present study is to analyze numerically the buckling behavior of cracked thin bi-material structures subjected to compression and tensile stresses and this, by considering the evolution of crack lengths and its orientations at the interface. This research work allows to quantify numerically the buckling phenomenon which can affects the thin plates for both cases, with and without interface crack especially, when the plate is subjected to tensile loading. The main important results of numerical simulations show that for the case of compression loading, the presence of interfacia

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10

WU, W. X., C. SHU, C. M. WANG, and Y. XIANG. "FREE VIBRATION AND BUCKLING ANALYSIS OF HIGHLY SKEWED PLATES BY LEAST SQUARES-BASED FINITE DIFFERENCE METHOD." International Journal of Structural Stability and Dynamics 10, no. 02 (2010): 225–52. http://dx.doi.org/10.1142/s021945541000349x.

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It is well-known that stress singularities occur at the obtuse corners of skew plates, especially when the skew angles are large. Owing to the stress singularities, accurate bending results, vibration frequencies and buckling loads of highly skewed plates are difficult to obtain accurately. In this paper, the mesh-free least squares-based finite difference (LSFD) method is proposed for solving the free vibration and buckling problems of highly skewed plates. As such vibration and buckling results are scarce in the open literature, the method was verified by comparing the LSFD solutions with ex

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11

Shimamoto, Akira, Hiroshi Ohkawara, and Jeong Hwan Nam. "Influence of Anisotropic Properties Upon Stress Intensity Factors under Biaxial Stress." Key Engineering Materials 385-387 (July 2008): 193–96. http://dx.doi.org/10.4028/www.scientific.net/kem.385-387.193.

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In this study, stress intensity factors were investigated and determined by photoelastic and caustics methods to clarify the mechanical behavior of crack tips under various biaxiality ratios. Polycarbonate (PC) plates with isotropic and anisotropic properties were used as specimens. The results confirmed that regardless of biaxiality ratio or the material’s property only ‘KI’ was generated in cases of a crack angle θ = 0º. It was also confirmed that only KI was generated in the isotropic PC plate with crack angle θ = 45º under a biaxial load (1:1). When the biaxiality ratio is more than 1:1 wi

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12

Bhattacharya, Paramita, and Jyant Kumar. "Pullout capacity of inclined plate anchors embedded in sand." Canadian Geotechnical Journal 51, no. 11 (2014): 1365–70. http://dx.doi.org/10.1139/cgj-2014-0114.

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The pullout capacity of an inclined strip plate anchor embedded in sand has been determined by using the lower bound theorem of the limit analysis in combination with finite elements and linear optimization. The numerical results in the form of pullout factors have been presented by changing gradually the inclination of the plate from horizontal to vertical. The pullout resistance increases significantly with an increase in the horizontal inclination (θ) of the plate especially for θ > 30°. The effect of the anchor plate–soil interface friction angle (δ) on the pullout resistance becomes ex

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13

Zuiko, Ivan, Vladislav Kulitckii, and Rustam Kaibyshev. "Effect of Pre-Straining Method on Mechanical Properties of Thermo-Mechanically Processed Al-Cu-Mg Alloy." Defect and Diffusion Forum 385 (July 2018): 364–69. http://dx.doi.org/10.4028/www.scientific.net/ddf.385.364.

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The present study deals with the effect of pre-deformation technique of AA2519 alloy (Al–5.64Cu–0.33Mn–0.23Mg–0.15Zr–0.11Ti–0.09V–0.08Fe–0.01Si (wt. %)) under T8 tempers, on condition that intermediate strains are equal. After undergoing T87 by pre-stretching and peak ageing the alloy demonstrates the yield stress, ultimate tensile strength and elongation to failure of 425.4±2.4 MPa, 475±2.4 MPa, 12.1±0.4%, respectively. The 7% pre-straining by rolling leads to-5% decrease in yield stress, practically the same ultimate tensile strength and-20% decrease in ductility. This effect can be ascribed

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14

Aktaş, Mehmet. "Buckling Behaviour of Carbon/Epoxy Laminated Composite Plates under Biaxial Loading." Advanced Composites Letters 18, no. 3 (2009): 096369350901800. http://dx.doi.org/10.1177/096369350901800303.

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In this numerical and analytical study; the length-to-thickness ratio (a/t), aspect ratio (a/b), Young modulus ratio ( E1/ E2), load ratio ( Nx/ Ny) and different boundary conditions effect on buckling behaviour of carbon/epoxy composite laminated plate were investigated. The composite plate was assumed four plies as [θ°]4. The fibre orientation, θ, was chosen as 0°, 15°, 30°, 45°, 60°, 75° and 90°. The Veres-Kollar approach [ 1 ] was used to calculate the buckling load, analytically. Also, ANSYS 10 commercial software was used for determination of buckling load, numerically. The plate has sim

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15

Srinivasan, R. S., and L. S. Ramachandra. "Axisymmetric Nonlinear Dynamic Response of Bimodulus Annular Plates." Journal of Vibration and Acoustics 112, no. 2 (1990): 202–5. http://dx.doi.org/10.1115/1.2930113.

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In the present study, the geometrically nonlinear dynamic response of bimodulus annular and circular plates is obtained. The governing equations of the problem are formulated using the energy method and are solved by using annular finite elements spacewise. The integration in the time domain is accomplished by the Wilson θ method. Numerical work has been done for different hole sizes under various edge conditions and loadings.

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16

Gable, Brian M., та Barry C. Muddle. "Factors Influencing the Heterogeneous Nucleation of θ' in Al-Cu-In Alloy". Materials Science Forum 519-521 (липень 2006): 585–90. http://dx.doi.org/10.4028/www.scientific.net/msf.519-521.585.

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The ability to improve mechanical properties through trace alloying additions that enhance the precipitation-hardening response has been a cornerstone of aluminium research and alloy development. It is now known that many of these alloying additions are beneficial (or deleterious) because of their influence on the competitive precipitation kinetics, in many cases arising from the formation of chemical and structural heterogeneities in the matrix. In order to better our understanding of this phenomenon, the earliest stages of microstructural evolution of indium precipitates and θ' plates in an

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17

Achour, B., D. Ouinas, M. Touahmia, and M. Boukendakdji. "Buckling of Hybrid Composite Carbon/Epoxy/Aluminum Plates with Cutouts." Engineering, Technology & Applied Science Research 8, no. 1 (2018): 2393–98. http://dx.doi.org/10.48084/etasr.1224.

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Structural instability becomes an important concern in the composite plate safe and reliable design. In this research, a resistance analysis is carried out on plates made of hybrid composite material with and without elliptical cutouts using the finite element method. The carbon/epoxy/aluminum laminated plates are arranged in the following ordered manner [Al/(θ/-θ)/Al]. The hybrid plate resistance to buckling submitted to uniaxial compression is highlighted. Results indicate that given a structural geometry, boundary and loading condition and stacking sequence, the buckling resistance of such

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18

Bravo, J. C. V., H. P. Oquendo, and J. E. M. Rivera. "Optimal Decay Rates for Kirchhoff Plates with Intermediate Damping." TEMA (São Carlos) 21, no. 2 (2020): 261. http://dx.doi.org/10.5540/tema.2020.021.02.261.

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In this paper we study the asymptotic behavior of Kirchhoff plates with intermediate damping. The damping considered contemplates the frictional and the Kelvin-Voigt type dampings. We show that the semigroup those equations decays polynomially in time at least with the rate t^{-1/(2-2θ)}, where θ is a parameter in the interval [0,1[. Moreover, we prove that this decay rate is optimal.

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19

Zuiko, I. S., M. R. Gazizov, and R. O. Kaibyshev. "On the Precipitation of the -Phase {111} Al Plates in the Al–Cu–Mg Alloy." Физика металлов и металловедение 124, no. 5 (2023): 428–33. http://dx.doi.org/10.31857/s0015323022601787.

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The precipitation of Ω-phase {111}α plates in the Al–Cu–Mg alloy has been investigated at a Cu/Mg ratio 10 and low Si content. Unlike Al–Cu–Mg alloys containing Ag, nanoscale plates with an {111}α habit plane has been found for the first time to precipitate in the alloy according to a heterogeneous mechanism, namely, along low-angle boundaries, dislocation lines, and at the θ′-phase/Al-matrix interphaseboundary.

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20

Kostopoulos, V., and D. Th Korontzis. "Damping Characteristics of Vibrated Composite Plates." Advanced Composites Letters 9, no. 6 (2000): 096369350000900. http://dx.doi.org/10.1177/096369350000900604.

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The free vibration response of [±Θ] ns orthogonal, simply supported (all around) composite laminated plates was studied, assuming linear viscoelastic behaviour of the constitutive lamina material. The problem was solved numerically and the results were verified in the special case of [0]2 n laminate against the analytical solution, which is also provided. Stability and convergence problems were discussed analytically. Eigenfrequency values and modal damping characteristics were calculated for the first nine mode shapes. Furthermore, keeping constant the plate thickness, the effect of the lamin

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21

Gouné, M., A. Redjaïmia, T. Belmonte, and H. Michel. "Identification and characterization of a novel Mn–N nitride formed in Fe–Mn–N alloy." Journal of Applied Crystallography 36, no. 1 (2003): 103–8. http://dx.doi.org/10.1107/s0021889802020101.

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An unexpected phase, formed throughout the ferritic matrix of an Fe–Mn (1.62 wt% Mn) alloy during a nitriding treatment at 843 K for 8 h, is analysed. This new phase, labelled θ′, is a metastable Mn nitride. It adopts the form of plates, with length 200 nm and width 20 nm. Its crystal structure is established by electron microdiffraction in conjunction with group-theory analysis. This nitride crystallizes in the tetragonal system and belongs to the space groupP 42/m 2/m 2/cwith the following lattice parameters: a_{\theta'} = 2.876 Å and c_{\theta'} = 5.752 Å. The θ′-phase crystal lattice is or

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22

Migranov, N. G., and D. V. Kondratyev. "Layered anisotropic liquids: deformation of structures in electric and magnetic fields." Proceedings of the Mavlyutov Institute of Mechanics 12, no. 2 (2017): 214–18. http://dx.doi.org/10.21662/uim2017.2.032.

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On the basis of the analysis of the free energy of a viscoelastic anisotropic layer liquid, a chiral ferroelectric liquid crystal C^∗ , located in a thin cell in a ”bookshelf“ geometry the possibility of the smectic layers periodic distortions in the external magnetic H and electric E fields applied perpendicularly and along the plates, respectively, are investigated. The polar angle θ formed by the unit vector n and the normal a to the smectic planes is fixed, and the appearing Helfrich–Yuro distortions u of the smectic layers are assumed to be small in the proposed continuum model of the liq

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23

Zhou, Zhao Zhong, Ju Long Yuan, Bing Hai Lv, and Jia Jin Zheng. "Study on the Evaluation Method of Lapping Uniformity for Ceramic Balls." Advanced Materials Research 53-54 (July 2008): 147–54. http://dx.doi.org/10.4028/www.scientific.net/amr.53-54.147.

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To study the sphere-shaping mechanism under dual rotating plates (DRP) lapping mode for ceramic balls, the uniformity of lapping trace distribution is focused in this paper. Methods for simulation and evaluation of the lapping trace uniformity are proposed, and the effect of velocity parameters on the lapping uniformity of ball under DRP lapping mode is analyzed. It is found that the lapping uniformity is dependent not only on the variation range of spin angle θ, but also on the spin angle speed ωb and on the variation form of θ. The analysis results indicate that the effect of amplitude of th

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24

Jones, L. R., T. Shanks, and R. Fong. "Angular Correlations of Faint (B<24) Galaxies." Symposium - International Astronomical Union 130 (1988): 528. http://dx.doi.org/10.1017/s0074180900136575.

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We investigate the two point angular correlation function, ω(θ), of faint galaxy samples obtained from COSMOS machine measurements of 3.9m AAT plates. The area of sky used is the largest yet covered to very faint limits(bj<24 over 2.1 deg2 and rF<22 over 1.4 deg2). The power law slope of ω(θ) is found to be consistent with a value of −0.8 at all depths in both passbands (see fig.1). The amplitudes measured by different authors show a large scatter in the blue passband (see fig.2). If this scatter also appied to the red passband (fig.3) we conclude that although a smaller clustering ampli

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25

Fong, R., N. Metcalfe, and T. Shanks. "Photometric Calibration and Large-Scale Clustering in the Universe." Symposium - International Astronomical Union 161 (1994): 295–300. http://dx.doi.org/10.1017/s0074180900047513.

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The machine measurements of UK Schmidt plates have produced two very large galaxy surveys, the APM survey and the Edinburgh-Durham Southern Galaxy Catalogue (or COSMOS survey). These surveys can constrain the power on large scales of ≳ 10h −1 Mpc better than current redshift surveys, simply because such large numbers, ≳ 2 million galaxies to bJ ≤ 20.5, provide very high signal/noise in the estimated two-point correlation function for galaxies. Furthermore, the results for the three-dimensional galaxy two point correlation function, ξ(r), obtained from the measured projected function, ω(θ), sho

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26

Xie, Jing, Xilan Luo, Jinfeng Wang, and Yuyan Liu. "Effect of Inclined Orifice in Air Impingement Freezer on Heat Transfer Characteristics of Steel Strip Surface." Processes 11, no. 8 (2023): 2410. http://dx.doi.org/10.3390/pr11082410.

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In order to improve the heat transfer characteristics of the air impingement freezer, an impingement freezer experimental table was designed as the research object in this paper. Numerical simulation technology was used to simulate the impingement freezer experimental table on the basis of test verification. When the other structural parameters in the impingement freezer experimental table were constant, the effect of the inclination angle of the orifice plate (θ = 60°, 65°, 70°, 75°, 80°, 85°, and 90°) on the heat transfer characteristics of a steel strip surface was analyzed by two aspects,

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27

JO, JONG-HYUN, and YOUNG-SHIN LEE. "A STUDY OF RICOCHET PHENOMENON FOR INCLINED IMPACT OF PROJECTILE." International Journal of Modern Physics: Conference Series 06 (January 2012): 443–48. http://dx.doi.org/10.1142/s2010194512003583.

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In this study, the numerical simulation using AUTODYN-3D program was investigated for trajectory prediction for inclined impacts of projectiles. The penetration and perforation of polycarbonate( PC ) plate by 7.62 mm projectile was investigated numerically. The characteristic structure of the projectile's trajectory in the PC plates was studied. Two combined failure criteria were used in the target plate, and the target plate was modeled with the properties of polycarbonate for simulating the ricochet phenomenon. The numerical analyses were used to study the effect of the angle of inclination

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28

Ghanim, Mohannad R., and Sabah T. Ahmed. "Reducing Roof Solar Heat Gain by Using Double-Skin Ventilated Roofs." Engineering and Technology Journal 38, no. 3A (2020): 402–11. http://dx.doi.org/10.30684/etj.v38i3a.462.

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Double skin ventilated roof is one of the important passive cooling techniques to reduce solar heat gain through roofs. In this research, an experimental study was performed to investigate the thermal behaviour of a double skin roof model. The model was made of two parallel galvanized steel plates. Galvanized steel has been used in the roof construction of industrial buildings and storehouses in Iraq. The effect of inclination angle (ϴ) from the horizontal and the spacing (S) between the plates was investigated at different radiation intensities. It is found that using a double skin roof arran

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29

Kumar, Dhotre Pavan, and Chikkol V. Srinivasa. "Modal Characterization of Sandwich Skew Plates." Acta Mechanica et Automatica 15, no. 3 (2021): 143–53. http://dx.doi.org/10.2478/ama-2021-0019.

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Abstract The current work focuses on the experimental and finite element free vibration studies of laminated composite sandwich skew plates. The comparison was made between the experimental values obtained by the Fast Fourier transform (FFT) analyzer and a finite element solution obtained from CQUAD8 finite element of The MacNeal-Schwendler Corporation (MSC) / NASA STRucture Analysis (NASTRAN) software. The influence of parameters such as aspect ratio (AR) (a/b), skew angle (α), edge condition, laminate stacking sequence, and fiber orientation angle (θ°) on the natural frequencies of sandwich

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30

Kaman, Mete Onur. "Effect of fiber orientation on fracture toughness of laminated composite plates [0°/θ°]s". Engineering Fracture Mechanics 78, № 13 (2011): 2521–34. http://dx.doi.org/10.1016/j.engfracmech.2011.06.005.

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Kishi, Yoichi, Zenjiro Yajima, Teiko Okazaki, Yasubumi Furuya, and Manfred Wuttig. "Magnetic Properties and Microstructures of Rapidly Solidified FePd Alloy Ribbons." Advances in Science and Technology 59 (September 2008): 24–29. http://dx.doi.org/10.4028/www.scientific.net/ast.59.24.

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It is well known that FePd alloys are effective as a magneto-thermoelastic actuator material, because they have large magnetostriction and shape memory effect. In order to use the alloys for a micro-actuator, magnetic properties and microstructures have been examined as for rapidly solidified Fe-29.6 at% Pd alloy ribbons. The ribbons exhibit a large magnetostriction at room temperature and good shape memory effect. Magnetostriction and coercive force of the ribbons markedly depend on the direction of the applied magnetic field. Maximum values of magnetostriction and coercive force are obtained

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32

KRYLOV, VICTOR V. "PROPAGATION OF LOCALIZED VIBRATION MODES ALONG EDGES OF IMMERSED WEDGE-LIKE STRUCTURES: GEOMETRICAL-ACOUSTICS APPROACH." Journal of Computational Acoustics 07, no. 01 (1999): 59–70. http://dx.doi.org/10.1142/s0218396x99000060.

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The theory of antisymmetric localized elastic modes propagating along edges of immersed wedge-like structures is developed using the geometrical-acoustics approach to the description of flexural waves in elastic plates of variable thickness. The velocities of these modes, often called wedge acoustic waves, are calculated using solutions of the dispersion equation of the Bohr-Sommerfeld type following from the geometrical-acoustics description of localized wedge modes. In a subsonic regime of wave propagation, i.e. for wedge modes slower than sound in liquid, the influence of liquid loading res

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33

Arnab, Choudhury, Chandra Samar, Sarkar Susenjit, and Karmakar Mintu. "Analysis of Simply Supported Laminated Composite Plate by Semi Analytical and Finite Element Method for Different Orientation Angles." Strojnícky časopis - Journal of Mechanical Engineering 73, no. 2 (2023): 45–70. http://dx.doi.org/10.2478/scjme-2023-0021.

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Abstract Deflection of simply supported laminated composite plate under transverse load is found out by semi-analytical method (Classical Lamination Theory) and the results are compared with Finite element method using FEA software ANSYS. The equations developed by classical lamination theory for symmetric angle ply and cross ply laminated plate are solved by Navier and Rayleigh-Ritz method. The efficiency of Navier and Rayleigh-Ritz method in solving the problems of symmetric angle ply and cross ply laminated plate are investigated by comparing their results with ANSYS. Percentage error of th

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34

Infante, Leopoldo. "A New Catalogue of Faint Galaxies." Symposium - International Astronomical Union 139 (1990): 369–70. http://dx.doi.org/10.1017/s0074180900240941.

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A new catalogue of faint galaxies on a 3 deg2 area near the North Galactic Pole (NGP), complete to J =24.5 and F =23.5, has been obtained from nine Canada France Hawaii Telescope prime focus plates. The angular correlation function has been measured for the first time to separations ~1°. Preliminary results indicate a power law slope of ≈ −0.8 at small separations and no sharp break for θ ≤ 1°. We also find some evidence that the power law slope flattens to fainter limiting magnitudes.

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Abu-Farsakh, Ghazi A., Amin H. Almasri, and Dana H. Qa’dan. "Stress concentration around a central hole as affected by material nonlinearity in fibrous composite laminated plates subject to in-plane loading." Science and Engineering of Composite Materials 22, no. 1 (2015): 31–36. http://dx.doi.org/10.1515/secm-2013-0125.

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AbstractThe distribution of stresses in laminated composite plates with a central circular hole and having various stacking sequences, different geometric dimensions and subjected to in-plane axial tensile loading was investigated. The ANSYS computer program was utilized using the finite element method to study the linear and nonlinear material effects. A new method was proposed for the purpose of incorporating the material nonlinearity model into the ANSYS computer program using the secant modulus material model. The aim of the authors is to analyze the effect of D/b and a/b ratios (where D i

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Ma, Nailin, Yanjun Sun, and Yongjun Jian. "Electromagnetohydrodynamic (EMHD) Flow in a Microchannel with Random Surface Roughness." Micromachines 14, no. 8 (2023): 1617. http://dx.doi.org/10.3390/mi14081617.

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This study investigates the effect of small random transverse wall roughness on electromagnetohydrodynamic (EMHD) flow is in a microchannel, employing the perturbation method based upon stationary random function theory. An exact solution of a random corrugation function ξ, which is a measure of the flow rate deviated from the case without the roughness of two plates, is obtained by integrating the spectral density. After the sinusoidal, triangular, rectangular, and sawtooth functions that satisfy the Dirichlet condition are expanded into the Fourier sine series, the spectral density of the si

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Loughlan, J. "The compressive buckling performance of anti-symmetric composite laminates and the effect on behaviour of membrane-flexural coupling." Aeronautical Journal 106, no. 1065 (2002): 595–606. http://dx.doi.org/10.1017/s000192400001825x.

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AbstractThe compressive stability of anti-symmetric angle-ply laminated plates with particular reference to the degrading influence of membrane-flexural coupling is reported in this paper. A specific configuration of anti-symmetric laminate is dealt with in the paper and this takes the form [θ/-θ]n whereby 2n is the total number of plies in the laminated stack. With regard to compressive buckling the paper gives an indication that anti-symmetric laminates with 8 plies or more will yield performance levels which are almost identical to their symmetric counterparts. The degree of membrane-flexur

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Loughlan, J. "The compressive buckling performance of anti-symmetric composite laminates and the effect on behaviour of membrane-flexural coupling." Aeronautical Journal 106, no. 1065 (2002): 595–606. http://dx.doi.org/10.1017/s000192400001160x.

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AbstractThe compressive stability of anti-symmetric angle-ply laminated plates with particular reference to the degrading influence of membrane-flexural coupling is reported in this paper. A specific configuration of anti-symmetric laminate is dealt with in the paper and this takes the form [θ/-θ]n whereby 2n is the total number of plies in the laminated stack. With regard to compressive buckling the paper gives an indication that anti-symmetric laminates with 8 plies or more will yield performance levels which are almost identical to their symmetric counterparts. The degree of membrane-flexur

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Nitsche, Ludwig C., and E. J. Hinch. "Shear-induced lateral migration of Brownian rigid rods in parabolic channel flow." Journal of Fluid Mechanics 332 (February 1997): 1–21. http://dx.doi.org/10.1017/s0022112096003369.

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This paper addresses the cross-stream migration of rigid rods undergoing diffusion and advection in parabolic flow between flat plates – a simple model of a polymer that possesses internal (rotational) degrees of freedom for which the probability distribution depends upon the local shear rate. Unequivocal results on the observable concentration profiles across the channel are obtained from a finite–difference solution of the full Fokker–Planck equation in the space of lateral position y and azimuthal angle φ, the polar angle θ being constrained to π/2 for simplicity. Steric confinement and hyd

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Chang, Long, Guangpu Zhao, Mandula Buren, Yanjun Sun, and Yongjun Jian. "Alternating Current Electroosmotic Flow of Maxwell Fluid in a Parallel Plate Microchannel with Sinusoidal Roughness." Micromachines 15, no. 1 (2023): 4. http://dx.doi.org/10.3390/mi15010004.

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The EOF of a viscoelastic Maxwell fluid driven by an alternating pressure gradient and electric field in a parallel plate microchannel with sinusoidal roughness has been investigated within the Debye–Hückel approximation based on boundary perturbation expansion and separation of variables. Perturbation solutions were obtained for the potential distribution, the velocity and the mean velocity, and the relation between the mean velocity and the roughness. There are significant differences in the velocity amplitudes of the Newtonian and Maxwell fluids. It is shown here that the velocity distribut

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Arslan, Nurettin, Mehmet Çelik та Nuray Arslan. "Prediction of the elastic–plastic behavior of thermoplastic composite laminated plates ([0°/θ°]2) with square hole". Composite Structures 55, № 1 (2002): 37–49. http://dx.doi.org/10.1016/s0263-8223(01)00126-x.

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Karayiannis, T. G., and J. D. Tarasuk. "Natural Convection in an Inclined Rectangular Cavity With Different Thermal Boundary Conditions at the Top Plate." Journal of Heat Transfer 110, no. 2 (1988): 350–57. http://dx.doi.org/10.1115/1.3250491.

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Natural convection inside a rectangular cavity with different temperature boundary conditions on the cold top plate was studied using a Mach-Zehnder interferometer for θ = 15, 45, and 60 deg to the horizontal. At θ = 60 deg coupling with external forced convection and non-coupled heat transfer from a cavity with an isothermal top plate was studied. In all experiments the bottom hot plate was isothermal. The Rayleigh number Ra was varied from subcritical to 6×105 and the cavity aspect ratio ARx, from 6.68 to 33.4. The Reynolds number of the external forced flow Redh was constant and approximate

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Burak Toparli, M., and Michael E. Fitzpatrick. "Through Thickness Residual Stress Measurements by Neutron Diffraction and Hole Drilling in a Single Laser-Peened Spot on a Thin Aluminium Plate." Materials Science Forum 772 (November 2013): 167–72. http://dx.doi.org/10.4028/www.scientific.net/msf.772.167.

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Residual stress measurements are very challenging in thin aluminium plates. Rolling-induced crystallographic texture can lead to an S-shape fit when using the sin2ψ method for surface X-ray diffraction. Peak broadening and missing peaks can also be observed for synchrotron X-ray diffraction with conventional θ/2θ scanning due to texture. In addition, when measuring near the plate surfaces, partially-filled gauge volumes in diffraction experiments will lead to “pseudo-strains”, an apparent shift between measured and actual positions for the diffraction peak. Obtaining a meaningful value of d0 f

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SHISHKINA, OLGA, and ANDRÉ THESS. "Mean temperature profiles in turbulent Rayleigh–Bénard convection of water." Journal of Fluid Mechanics 633 (August 25, 2009): 449–60. http://dx.doi.org/10.1017/s0022112009990528.

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We report an investigation of temperature profiles in turbulent Rayleigh–Bénard convection of water based on direct numerical simulations (DNS) for a cylindrical cell with unit aspect ratio for the same Prandtl number Pr and similar Rayleigh numbers Ra as used in recent high-precision measurements by Funfschilling et al. (J. Fluid Mech., vol. 536, 2005, p. 145). The Nusselt numbers Nu computed for Pr = 4.38 and Ra = 108, 3 × 108, 5 × 108, 8 × 108 and 109 are found to be in excellent agreement with the experimental data corrected for finite thermal conductivity of the walls. Based on this succe

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Kamal Babu, Karupannan, Kavan Panneerselvam, Paulraj Sathiya, et al. "Effects of various tool pin profiles on mechanical and metallurgical properties of friction stir welded joints of cryorolled AA2219 aluminium alloy." Metallurgical Research & Technology 115, no. 2 (2018): 212. http://dx.doi.org/10.1051/metal/2017100.

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Friction stir welding (FSW) process was conducted on cryorolled (CR) AA2219 plate using different tool pin profiles such as cylindrical pin, threaded cylindrical pin, square pin and hexagonal pin profiles. The FSW was carried out with pairs of 6 mm thick CR aluminium plates with different tool pin profiles. The different tool pin profile weld portions' behaviors like mechanical (tensile strength, impact and hardness) and metallurgical characteristics were analyzed. The results of the mechanical analysis revealed that the joint made by the hexagonal pin tool had good strength compared to other

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Vu, M. N., S. Geniaut, P. Massin та J. J. Marigo. "Numerical investigation on corner singularities in cracked plates using the G-theta method with an adapted θ field". Theoretical and Applied Fracture Mechanics 77 (червень 2015): 59–68. http://dx.doi.org/10.1016/j.tafmec.2015.02.003.

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Rabha, Kankana, Saleem Jabed Al Khayer, and Shyamanta Chakraborty. "Effect of Induced Magnetic Field on MHD Flow Between Two Parallel Porous Plates at Constant Temperature Gradient in Presence of Inclined Magnetic Field." East European Journal of Physics, no. 1 (March 5, 2024): 262–68. http://dx.doi.org/10.26565/2312-4334-2024-1-22.

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The paper studies effect of induced magnetic field on laminar convection flow of a viscous electrically conducting incompressible fluid between two parallel porous plates at constant temperature gradient in presence of a uniform inclined magnetic field. An angle (θ) is formed with the vertical line by applying a magnetic field in that direction and field is strong enough to induce another field along the line of flow. Using the proper similarity transformations, the flow equations are converted into ordinary differential equations, which are then numerically solved by using MATLAB's bvp4c solv

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Yu, Wei, Ju Long Yuan, Bing Hai Lv, Qian Fa Deng, and Dun Liu. "Analysis on Sliding State of Ball in Rotated Dual-Plates Lapping Mode." Advanced Materials Research 317-319 (August 2011): 345–49. http://dx.doi.org/10.4028/www.scientific.net/amr.317-319.345.

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Abstract . The sliding states of precision ball is an important factor in lapping uniform. To study the sliding state of ball in Rotated Dual-Plates(RDP) Lapping Mode, this paper analyses several kinds of sliding states from theory to the simulation based on the kinematics and dynamic.It is assumed that the slide could occure between the ball and inner lower plate or between the ball and outer lower plate. The simulation results show that there are several numerical combination among the spin angle θ, the coefficient ratio of sliding friction and the rotating speed ratio of the outer lower pla

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Aslanov, T. G., and S. A. Ibragimov. "Investigation of the dependencies of the Vivaldi antenna with a resonator in the electrodynamic modeling software complex." Herald of Dagestan State Technical University. Technical Sciences 51, no. 1 (2024): 31–39. http://dx.doi.org/10.21822/2073-6185-2024-51-1-31-39.

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Objective. The goal of the study is to optimize a computer model of a Vivaldi antenna with conductive plates on the same side as the resonator.Method. The study is based on electrodynamic modeling methods.Result.The paper presents a computer model of a Vivaldi antenna with conductive plates on one side with a resonator. A comparative analysis of two types of Vivaldi antennas was carried out of the dependence of the beam width and the voltage standing wave ratio on the radius of the current-conducting plate curve in the form of lobes and the values of the opening in two planes θ = 900 (the plan

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Gangadharan, Sathya N., and Heinz L. Krein. "Jet-Propelled Remote-Operated Underwater Vehicles Guided by Tilting Nozzles." Marine Technology and SNAME News 26, no. 02 (1989): 131–44. http://dx.doi.org/10.5957/mt1.1989.26.2.131.

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This paper is a study and experimental analysis of a forced jet propulsion system with tilting-type nozzles for slow-moving remotely operated underwater vehicles (ROV's). A test setup simulating the motion of the underwater vehicle was fabricated to investigate the effect of nozzle configurations on the propulsion of such vehicles. Plexiglass nozzles of different conical contraction angles (θ = 4 to 28 deg), different conical expansion angles (θ = 3 to 9 deg), and a straight cylindrical section were used in the study. Tests were carried out underwater, and the parameters measured include thrus

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