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  • Articles  (2,079)
  • Springer  (2,079)
  • American Chemical Society (ACS)
  • American Geophysical Union
  • American Meteorological Society
  • National Academy of Sciences
  • 2015-2019  (2,079)
  • 2005-2009
  • 1980-1984
  • 2017  (935)
  • 2016  (1,144)
  • Acta Mechanica  (370)
  • Russian Journal of Physical Chemistry A  (337)
  • 4493
  • 64378
  • Physics  (2,079)
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  • Articles  (2,079)
Source
Publisher
  • Springer  (2,079)
  • American Chemical Society (ACS)
  • American Geophysical Union
  • American Meteorological Society
  • National Academy of Sciences
Years
  • 2015-2019  (2,079)
  • 2005-2009
  • 1980-1984
Year
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  • 1
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    A method to derive thermoelastic Green’s functions for bounded domains (on examples of two-dimensional problems for parallelepipeds) (2016)
    Springer
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    Publication Date: 2016-07-21
    Description: This article presents new constructive formulas to steady-state thermoelastic Green’s functions for a plane generalized boundary value problem of thermoelasticity for a generalized rectangle. The constructive formulas are expressed in terms of Green’s functions for Poisson’s equation. These results are formulated in a special theorem, which is proved using the author’s developed harmonic integral representations method. On the base of derived constructive formulas, it is possible to obtain many analytical expressions for Green’s functions for thermoelastic displacements and stresses to 28 concrete boundary value problems for: rectangle-16, half-strip-8, strip-4. An example of such kind is presented for a concrete plane boundary value problem for a rectangle, Green’s functions of which are presented in the form of a sum of elementary functions and ordinary series. These results are presented in another theorem, which is proved on the base of derived general constructive formulas. In the particular case for a half-strip and strip, ordinary series vanish and Green’s functions are presented in elementary functions. New analytical expressions for thermal stresses to a particular plane problem for a thermoelastic rectangle subjected to a constant boundary temperature gradient are also derived. Numerical investigation has shown that the infinite series are convergent. All solutions obtained for thermal stresses, caused by a constant temperature gradient and by a unit heat source are validated by checking the respective equilibrium equation and continuity of deformation equations (Beltrami–Michel equations), written in the terms of thermal stresses. The graphics for thermal stresses and their infinite series also are presented.
    Print ISSN: 0001-5970
    Electronic ISSN: 1619-6937
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
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  • 2
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    Free transverse vibration of double-walled carbon nanotubes embedded in viscoelastic medium (2016)
    Springer
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    Publication Date: 2016-07-21
    Description: This paper aims to study the vibration characteristics of viscoelastic double-walled carbon nanotubes embedded in a viscoelastic medium. In doing this, the governing equations of the system are derived by combining the Euler–Bernoulli beam theory, nonlocal viscoelastic model and Kelvin viscoelastic foundation model. Subsequently, the transfer function method is employed to solve the governing equations, which enables one to obtain the natural frequencies and the corresponding mode shapes in closed form for the DWCNTs with arbitrary boundary conditions. Here, the developed mechanics model is first compared with the existing techniques available in the literature, where excellent agreement is achieved. Also, a detailed parametric study is conducted to examine the effect of boundary conditions, nonlocal parameter, relaxation time, slenderness ratio, stiffness coefficient and damping coefficient on the vibration response of the DWCNTs.
    Print ISSN: 0001-5970
    Electronic ISSN: 1619-6937
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
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  • 3
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    Analysis of anisotropic gradient elastic shear deformable plates (2016)
    Springer
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    Publication Date: 2016-07-21
    Description: In this paper, Reddy’s third-order shear deformable plate theory is employed for the analysis of centrosymmetric anisotropic plate structures within strain gradient elasticity. The general three-dimensional anisotropic gradient theory is reduced to a two-dimensional formulation for the analysis of thick plate structures. The third-order shear deformation theory (TSDT) takes into account quadratic variation of the transverse shear strains of the plate and does not require shear correction factors. In order to investigate the case of small strains but moderate rotations, the von Kármán strains are considered. The TSDT is also simplified to anisotropic Kirchhoff plate theory within gradient elasticity. To study specific material properties in more detail, the (Kirchhoff and TSDT) gradient plate theory of general anisotropy is simplified to the more practical case of orthotropic plates. It is observed that the gradient theory provides the capability to capture the size effects in anisotropic plate structures. As case studies, the bending and buckling behaviors of the simply supported orthotropic (Kirchhoff and TSDT) plates are studied. Variationally consistent boundary conditions are also discussed. Finally, analytical solutions are presented for the bending and buckling of simply supported orthotropic Kirchhoff plates. The effects of internal length scales on deflections and buckling loads are presented.
    Print ISSN: 0001-5970
    Electronic ISSN: 1619-6937
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
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  • 4
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    Experimental study of the deflections of curved plates exposed to pulsating cross-flows (2016)
    Springer
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    Publication Date: 2016-07-21
    Description: The deflection of thin, elastic plates with different curvatures is experimentally investigated under pulsatile cross-flow conditions. Average and maximum deflections are reported in terms of the plate’s curvature, flow frequency, and stroke fraction. The laboratory results indicate that the maximum deflections can be reduced significantly when the curvature is increased (around 50 % for low-to-intermediate curvatures and up to 80 % for high curvatures). Moreover, the comparative analysis shows that the deflection is inversely proportional to the rigidity of the plates, which depends nonlinearly on the curvature. Based on the observed behavior, a simplified Euler–Bernoulli beam model is derived to qualitatively explain the effects of geometrical factors such as the curvature, the thickness, and the length of the plates. Some traits of the flow evolving around the plate and the need to have accurate measurements of the pressure are discussed.
    Print ISSN: 0001-5970
    Electronic ISSN: 1619-6937
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
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  • 5
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    Study of liquid–solid catalytic reaction of epichlorohydrin with sodium butyrate in the presence of tetrabutylammonium bromide (2016)
    Springer
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    Publication Date: 2016-07-21
    Description: The liquid–solid catalytic reaction of epichlorohydrin and sodium butyrate with tetrabutylammonium bromide as a phase transfer catalyst was studied in this paper. The shrinking core model was applied. The analysis of the reaction based on the kinetic model showed a reaction-controlled regime at temperatures varying from 90 to 100°C. The exterior diffusivity was removed between 300 and 400 rpm. The internal diffusivity was removed when the particle size was 2 × 10 –4 m. Reaction rate constants were calculated at different temperatures. The correlation was obtained when the proposed kinetic model was applied to all the experimental data for predictive evaluations and the activation energy was 37.01 kJ mol –1 .
    Print ISSN: 0036-0244
    Electronic ISSN: 1531-863X
    Topics: Chemistry and Pharmacology , Physics
    Published by Springer on behalf of MAIK Nauka/Interperiodica.
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  • 6
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    Erratum to: “Multifractal parametrization for the volume of space forms on surfaces of Zn x Cd 1–x Te–Si(111) heterocompositions and estimating the energy of a surface with fractal structure” (2016)
    Springer
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    Publication Date: 2016-07-21
    Print ISSN: 0036-0244
    Electronic ISSN: 1531-863X
    Topics: Chemistry and Pharmacology , Physics
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  • 7
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    Removal of heavy metal ions by biogenic hydroxyapatite: Morphology influence and mechanism study (2016)
    Springer
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    Publication Date: 2016-07-21
    Description: Based on the synthesis of hydroxyapatite (HA) with different morphologies, such as nanorod-like, flower-like and sphere-like assembled HA nanorods, a new strategy has been developed for the removal of heavy metal ions such as Pb 2+ , Cu 2+ , Mn 2+ , Zn 2+ . The dependence of removal efficiency on the morphology and the suspended concentration of trapping agent, the removal time and selectivity were evaluated and discussed. The experimental results proved that the removal capacity of flower-like assembled HA nanorods (NAFL-HA) was the best, and the maximum removal ratio for Pb 2+ ion was 99.97%. The mechanism of Pb 2+ removal was studied in detail, noting that some metal ions were completely incorporated into hydroxyapatitie to produce Pb-HA. It reveals that the metal ions capture by HA is mainly controlled by sample surface adsorption and co-precipitation, which are directly controlled by sample morphology.
    Print ISSN: 0036-0244
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    Topics: Chemistry and Pharmacology , Physics
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  • 8
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    Determining the cation exchange capacity of montmorillonite by simultaneous thermal analysis method (2016)
    Springer
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    Publication Date: 2016-07-21
    Description: A way of determining the cation exchange capacity of montmorillonite by simultaneous thermal analysis is developed using as an example the bentonites of the 10th Khutor deposit (Republic of Khakassia) and the Vodopadnyi area (Sakhalin Island). A correlation is established between the cation exchange capacity of smectite and its weight loss upon heating in the range of dehydration; the enthalpy of dehydration of montmorillonite; and the weight loss and the enthalpy of thermal dissociation of ethylene glycol contained in the interlayer space of the mineral’s crystal structure. These data open up new possibilities for determining the cation exchange capacity of montmorillonite, the most important technological indicator of the natural clay nanomineral.
    Print ISSN: 0036-0244
    Electronic ISSN: 1531-863X
    Topics: Chemistry and Pharmacology , Physics
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  • 9
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    Analysis of dynamic stress intensity factors for interfacial crack near shallow circular inclusion in bi-material half-space to SH wave (2016)
    Springer
    Details
    Publication Date: 2016-07-22
    Description: An analytical approach is used to investigate the SH-wave scattering problems of the bi-material half-space including a circular inclusion embedded and an interfacial crack. Considering the multiple scattering phenomena between the boundaries and the circular inclusion, the “image” principle is used to establish the expressions of the wave field. With the aid of interfacial conjunction, the interfacial crack is constructed. According to the displacement and stress continuity conditions, the Fredholm integral equations of the first kind are obtained to determine the unknown forces attached to the linking sections. Finally, analytical expressions for dynamic stress intensity factors are obtained. The numerical results for dynamic stress intensity factors are presented graphically considering the factors of the crack length, the incident wave number, the inclusion defect and the different media parameters.
    Print ISSN: 0001-5970
    Electronic ISSN: 1619-6937
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
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  • 10
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    Reflection and transmission of plane wave through fluid layer of finite width sandwiched between two monoclinic elastic half-spaces (2016)
    Springer
    Details
    Publication Date: 2016-07-22
    Description: This paper studies the reflection and transmission of a plane wave through a fluid layer of finite width sandwiched between two dissimilar monoclinic elastic half-spaces. Closed-form expressions for the phase velocity of quasi-waves (qP and qSV) have been obtained. The reflection/transmission coefficients and energy divisions have been procured for all the reflected and transmitted waves in terms of phase velocity, propagation vector, elastic constants and width of the layer. It has been noticed that these epitomes depend not only upon the incident angle and width of the layer, but also on the character of incident wave. Energy proportions have been calculated numerically to validate the rule of energy conservation at different angles of incidence. Graphical representation has been performed to demonstrate the analytical findings.
    Print ISSN: 0001-5970
    Electronic ISSN: 1619-6937
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
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