Autor: Wang, X. P. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Internal Friction of Li7La3Zr2O12 Based Lithium Ionic Conductors
Autorzy:: Wang, X. P.
Song, L.
Hu, J.
Xia, Y. P.
Xia, Y.
Gao, Y. X.
Zhang, L. C.
Magalas, L. B.
Fang, Q. F.
Powiązania:: https://bibliotekanauki.pl/articles/958222.pdf
Data publikacji:: 2016
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: lithium ionic conductor
Li7La3Zr2O12
internal friction
Opis:: The diffusion mechanisms of lithium ions in tetragonal phase as well as in Al and Nb stabilized cubic Li₇La₃Zr₂O₁₂ compounds were investigated by low-frequency internal friction technique. In the cubic Li₇La₃Zr₂O₁₂ phase, a remarkable relaxation-type internal friction peak PC with a peak height up to 0.12 was observed in the temperature range from 15°C to 60°C. In the tetragonal phase however, the height of the PT peak dropped to 0.01. The obvious difference of the relaxation strength between the cubic and tetragonal phases is due to the different distribution of lithium ions in lattice, ordered in the tetragonal phase and disordered in the cubic phase. Based on the crystalline structure of the cubic garnet-type Li₇La₃Zr₂O₁₂ compound, it is suggested that the high internal friction peak in the cubic phase may be attributed to two diffusion processes of lithium ions: 96h↔96h and 96h↔24d.
Źródło:: Archives of Metallurgy and Materials; 2016, 61, 1; 21-24
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: A screw dislocation located outside, inside or on the interface of a parabolic elastic inhomogeneity
Autorzy:: Wang, X.
Schiavone, P.
Powiązania:: https://bibliotekanauki.pl/articles/38627364.pdf
Data publikacji:: 2021
Wydawca:: Instytut Podstawowych Problemów Techniki PAN
Tematy:: screw dislocation
parabolic elastic inhomogeneity
superposition
conformal mapping
analytic continuation
Opis:: Using conformal mapping techniques, superposition and analytic continuation, we derive analytic solutions to the problem of a screw dislocation interacting with a parabolic elastic inhomogeneity. The screw dislocation can be located anywhere either in the surrounding matrix or in the parabolic inhomogeneity or simply on the parabolic interface itself. We obtain explicit expressions for the two analytic functions in the image plane characterizing the elastic fields describing displacement and stresses in the two-phase composite. Using the Peach-Koehler formula, we also obtain the image force acting on the screw dislocation. The analytic function defined in the parabolic inhomogeneity in the physical plane can be interpreted in terms of real and image screw dislocations for any location of the real screw dislocation.
Źródło:: Archives of Mechanics; 2021, 73, 3; 219-235
0373-2029
Pojawia się w:: Archives of Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Uniformity of electroelastic field within a three-phase anisotropic piezoelectric elliptical inhomogeneity in anti-plane shear
Autorzy:: Wang, X.
Schiavone, P.
Powiązania:: https://bibliotekanauki.pl/articles/38694715.pdf
Data publikacji:: 2022
Wydawca:: Instytut Podstawowych Problemów Techniki PAN
Tematy:: three-phase elliptical inhomogeneity
confocal ellipses
monoclinic piezoelectric material
transversely isotropic piezoelectric material
Stroh quartic formalism
real-form solution
Opis:: Using the Stroh quartic formalism, we prove that the internal electroelastic field is unconditionally uniform inside a three-phase anisotropic piezoelectric elliptical inhomogeneity with two confocal elliptical interfaces when the surrounding matrix is subjected to uniform remote anti-plane mechanical and in-plane electrical loading. The inhomogeneity and the matrix comprise monoclinic piezoelectric materials with symmetry plane at x3 = 0 and with poling in the x3-direction; the intermediate interphase layer is a transversely isotropic piezoelectric material with poling in the x3-direction. Moreover, we obtain the internal uniform electroelastic field inside the elliptical inhomogeneity and the non-uniform electroelastic field in the interphase layer in real-form in terms of the fundamental piezoelectricity matrices for both the inhomogeneity and the matrix and the generalized Barnett–Lothe tensors for both the interphase layer and the matrix.
Źródło:: Archives of Mechanics; 2022, 74, 2-3; 143-156
0373-2029
Pojawia się w:: Archives of Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: A mode-III crack with variable surface effects
Autorzy:: Wang, X.
Schiavone, P.
Powiązania:: https://bibliotekanauki.pl/articles/282009.pdf
Data publikacji:: 2016
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: surface elasticity
variable surface moduli
mode-III crack
Cauchy singular integro-differential equation
Opis:: We study the contribution of variable surface effects to the antiplane deformation of a linearly elastic material with a mode-III crack. The surface elasticity is incorporated using a modified version of the continuum based surface/interface model of Gurtin and Murdoch. In our discussion, the surface moduli are not constant but vary along the crack surfaces. Using Green’s function method, the problem is reduced to a single first-order Cauchy singular integro-differential equation, which is solved numerically using Chebyshev polynomials and a collocation method. Our results indicate that the gradient of the surface shear modulus exerts a significant influence on the crack opening displacement and on the singular stress field at the crack tips.
Źródło:: Journal of Theoretical and Applied Mechanics; 2016, 54, 4; 1319-1327
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Three-phase parabolic inhomogeneities with internal uniform stresses in plane and anti-plane elasticity
Autorzy:: Wang, X.
Schiavone, P.
Powiązania:: https://bibliotekanauki.pl/articles/38442156.pdf
Data publikacji:: 2020
Wydawca:: Instytut Podstawowych Problemów Techniki PAN
Tematy:: three-phase parabolic inhomogeneity
coating
internal uniform stresses
plane elasticity
anti-plane elasticity
Opis:: We examine the in-plane and anti-plane stress states inside a parabolic inhomogeneity which is bonded to an infinite matrix through an intermediate coating. The interfaces of the three-phase parabolic inhomogeneity are two confocal parabolas. The corresponding boundary value problems are studied in the physical plane rather than in the image plane. A simple condition is found that ensures that the internal stress state inside the parabolic inhomogeneity is uniform and hydrostatic. Furthermore, this condition is independent of the elastic properties of the coating and the two geometric parameters of the composite: in fact, the condition depends only on the elastic constants of the inhomogeneity and the matrix and the ratio between the two remote principal stresses. Once this condition is met, the mean stress in the coating is constant and the hoop stress on the coating side is also uniform along the entire inhomogeneity-coating interface. The unconditional uniformity of stresses inside a three-phase parabolic inhomogeneity is achieved when the matrix is subjected to uniform remote anti-plane shear stresses. The internal uniform anti-plane shear stresses inside the inhomogeneity are independent of the shear modulus of the coating and the two geometric parameters of the composite.
Źródło:: Archives of Mechanics; 2020, 72, 1; 27-38
0373-2029
Pojawia się w:: Archives of Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Uniform stress field inside a non-parabolic open inhomogeneity interacting with a mode III crack
Autorzy:: Wang, X.
Schiavone, P.
Powiązania:: https://bibliotekanauki.pl/articles/38612202.pdf
Data publikacji:: 2021
Wydawca:: Instytut Podstawowych Problemów Techniki PAN
Tematy:: non-parabolic inhomogeneity
mode III crack
uniform stress field
antiplane elasticity
conformal mapping
singular integral equation
Opis:: Using conformal mapping techniques, analytic continuation and the theory of Cauchy singular integral equations, we prove that a non-parabolic open inhomogeneity embedded in an elastic matrix subjected to a uniform remote anti-plane stress nevertheless admits an internal uniform stress field despite the presence of a finite mode III crack in its vicinity. Our analysis indicates that: (i) the internal uniform stress field is independent of the specific shape of the inhomogeneity and the presence of the finite crack; (ii) the existence of the finite crack plays a key role in the non-parabolic open shape of the inhomogeneity and in the non-uniform stresses in the surrounding matrix; (iii) the two-term asymptotic expansion at infinity of the stress field in the matrix is independent of the presence of the finite crack. Detailed numerical results are presented to demonstrate the proposed theory.
Źródło:: Archives of Mechanics; 2021, 73, 1; 67-81
0373-2029
Pojawia się w:: Archives of Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Uniform field within a non-elliptical inhomogeneity in the vicinity of a nearby non-circular Eshelby inclusion
Autorzy:: Wang, X.
Schiavone, P.
Powiązania:: https://bibliotekanauki.pl/articles/38629511.pdf
Data publikacji:: 2021
Wydawca:: Instytut Podstawowych Problemów Techniki PAN
Tematy:: non-elliptical inhomogeneity
Booth’s lemniscate inclusion
uniform field
conformal mapping
anti-plane elasticity
inverse problem
Opis:: We rigorously prove that a non-elliptical inhomogeneity continues to permit an internal uniform stress field despite the presence of a nearby non-circular Eshelby inclusion undergoing uniform anti-plane eigenstrains when the surrounding matrix is subjected to uniform remote anti-plane stresses. Here, we adopt a specific representation of the non-circular Eshelby inclusion as a Booth’s lemniscate inclusion. Our analysis indicates that the internal uniform stress field inside the non-elliptical inhomogeneity is independent of the existence of the Booth’s lemniscate inclusion whereas the non-elliptical shape of the inhomogeneity is attributed entirely to its presence. Representative numerical examples are presented to demonstrate the feasibility of the proposed method of general solution.
Źródło:: Archives of Mechanics; 2021, 73, 5-6; 541-555
0373-2029
Pojawia się w:: Archives of Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Preparation and Performance of a Novel Water Gel Explosive Containing Expired Propellant Grains
Autorzy:: Wang, P.
Xei, X.
He, W.
Powiązania:: https://bibliotekanauki.pl/articles/358510.pdf
Data publikacji:: 2013
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:: expired propellant
detonation performance
reuse
water gel explosive
Opis:: Novel water gel explosives containing expired single base and double base propellant grains were prepared by using a new gelling agent and a simple process. The shock wave overpressures and underwater output energies of the explosives were measured. The detonation performances of the explosives were also investigated. As the particle size of the propellant was increased, the detonation velocity, peak overpressure and underwater energy of the explosive containing single base propellant (NCP) were gradually reduced. Double base propellant (DBP) had low detonation sensitivity due to its thermoplasticity. When it was mixed with the appropriate quantity of NCP, DBP could also be reused. NCP acted as the sensitizer and energy source in the explosive containing both DBP and NCP. So the detonation velocity, peak overpressure and underwater energy of the explosive increased with the increase in ωNCP. With excellent detonation performance, these two kinds of water gel explosives can be used as opencast blasting agents.
Źródło:: Central European Journal of Energetic Materials; 2013, 10, 4; 495-507
1733-7178
Pojawia się w:: Central European Journal of Energetic Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Dynamic-accumulative operation policy of continuous distillation for the purification of anisole
Autorzy:: Wang, Z.
Li, S.
Wang, C.
Guo, X.
Bai, P.
Powiązania:: https://bibliotekanauki.pl/articles/779622.pdf
Data publikacji:: 2016
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:: anisole recycling
dynamic-accumulative operation policy
continuous distillation
simulation
Opis:: In the B10 isotope enrichment industry, the purification of anisole mixture makes great sense. A dynamic-accumulative operation policy of continuous distillation (DACD) with repeated filling and dumping of the still is proposed for the separation of trace heavy impurities in the recycled anisole. To simulate and optimize the purification process of anisole, a mathematical model of DACD is derived, and the computer codes are developed in the MATLAB environment. Moreover, the experiment is performed in a pilot-scale distillation column. The results show that the experimental date agrees well with simulation results. DACD could solve the difficulty of flow rate control when the bottom flow rate is very small in continuous distillation. The size of the still in this operation mode is also smaller than that in batch distillation. And the yield of anisole is raised to 99.91%. In a word, DACD is especially suitable for separating trace heavy impurities from the recycled anisole.
Źródło:: Polish Journal of Chemical Technology; 2016, 18, 1; 33-39
1509-8117
1899-4741
Pojawia się w:: Polish Journal of Chemical Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Ship domain model for multi-ship collision avoidance decision-making with COLREGs based on artificial potential field
Autorzy:: Wang, T.F.
Yan, X.P.
Wang, Y.
Wu, Q.
Powiązania:: https://bibliotekanauki.pl/articles/116475.pdf
Data publikacji:: 2017
Wydawca:: Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:: ship domain
ship domain model
collision avoidance
colregs
Artificial Potential Field (AFP)
decision-making
Predicted Area of Danger (PAD)
Closest Point of Approach (CPA)
Opis:: A multi-ship collision avoidance decision-making and path planning formulation is studied in a distributed way. This paper proposes a complete set of solutions for multi-ship collision avoidance in intelligent navigation, by using a top-to-bottom organization to structure the system. The system is designed with two layers: the collision avoidance decision-making and the path planning. Under the general requirements of the International Regulations for Preventing Collisions at Sea (COLREGs), the performance of distributed path planning decision-making for anti-collision is analyzed for both give-way and stand-on ships situations, including the emergency actions taken by the stand-on ship in case of the give-way ship’s fault of collision avoidance measures. The Artificial Potential Field method(APF) is used for the path planning in details. The developed APF method combined with the model of ship domain takes the target ships’ speed and course in-to account, so that it can judge the moving characteristics of obstacles more accurately. Simulation results indicate that the system proposed can work effectiveness.
Źródło:: TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2017, 11, 1; 85-92
2083-6473
2083-6481
Pojawia się w:: TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:: Biblioteka Nauki

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