https://www.elibrary.ru/title_about_new.asp?i
1605-8119
Materials physics and mechanics
18
1
2013
1-100
RAR
RUS
1-10
MITS
Vedanayakam
India
Rayalaseema University
Punyaseshudu
India
1/f noise studies on thin films of cadmium oxide
1/f noise and nonlinear effects in Cadmium Oxide thin films for different current densities on varying the thickness of the films, at room temperature are studied. The specific dependence of 1/f noise on the thickness of the film, the effect of current densities on 1/f noise for the films of various thicknesses (300 Å to 750 Å) has been investigated. It is noticed that, for a constant current, the thickness of the film leads to an increase of 1/f noise. 1/f noise plays an important role in choosing frequency band in which a device can be effectively used. Cadmium oxide thin films are regarded as a material with many attracting properties such as large energy band gap, good conduction, high transmission coefficient etc. It is specially used in optoelectronic devices.
1/f noise; nonlinear effects; Cadmium Oxide thin films
https://mpm.spbstu.ru/article/2013.30.1/
MPM_2013_18_1_P01.pdf
RAR
RUS
11-17
Sree Sastha Institute of Engineering and Technology
Sagadevan
India
Sree Sastha Institute of Engineering and Technology
Varatharajan
India
Technological importance of L-histidine family of NLO single crystals
Non-linear optical (NLO) materials possess an importance in laser technology, optical communication and optical storage technology. This review paper deals with the L-histidine family of a single crystal, a promising crystal for non-linear (NLO) applications. The growth of bulk single crystals of these materials has been a subject of permanent disquiet to be useful for device applications. Non-linear optical studies reveal that the dopant increased the efficiency of the L-histidine family of single crystal, and several reports are discussed. Recent papers reveal that the L-histidine family of NLO single crystal possesses excellent optical, thermal, mechanical properties that make it a strong candidate for photonic devices.
non-linear optical (NLO) materials; L-histidine family of NLO single crystals
https://mpm.spbstu.ru/article/2013.30.2/
MPM_2013_18_1_P02.pdf
RAR
RUS
18-27
Zhengzhou University
Liu
Zhengzhou, China
Zhengzhou University
Tie
Zhengzhou, China
Zhengzhou University
Li
Zhengzhou, China
Effects of pre-tightening force and connection mode on the strength and progressive damage of composite laminates with bolted joint
Pre-tightening force and the mode of connection are of great influences on progressive damage of connection. Two three-dimensional.3D.models of composite laminates with bolted joint are developed with the finite element software and compared with the analytical results. Using 3D failure criteria, the influences on the strength and progressive damage of composite laminates with bolted joint are analyzed. The results indicate that the connection strength in single-lap laminated plates increases by a given range of pre-tightening force, but the connection strength will be reduced by excessive level of pre-tightening force. orce, but the connection strength will be reduced by excessive level of pre-tightening force. While in double-lap laminated plates, it increases with the addition of pre-tightening force. The connection strength of double-lap laminated plates is higher than that of the single-lap laminated plates. It may be attributed to the secondary bending because of the eccentric load. The initial failure loads of composite laminates are improved with the appropriate pre-tightening force. Delamination and matrix cracking failure load of composite laminates are reduced and the connection strength is improved.
composite material; bolt joint; pre-tightening force; mode of connection; progressive damage
https://mpm.spbstu.ru/article/2013.30.3/
MPM_2013_18_1_P04.pdf
RAR
RUS
28-34
Government College of Technology
Moorthy
Tamilnadu, India
Government College of Technology
Manonmani
Tamilnadu, India
Fabrication and characterization of TiO2 particulate filled glass fiber reinforced polymer composite
A new, hybrid polymer composites were fabricated with random oriented e-glass fiber in unsaturated polyester resin matrix. Titanium oxide (TiO2) was used as reinforcement material and kept 10 wt.% constant. The fiber content was varied as 20 wt.%, 25 wt.%, 30 wt.%, 35 wt.%, and 40 wt.%. Unsaturated polyester resin was used as bonding agent. The composites were prepared with two different fiber lengths of 3 cm and 5 cm by hand layup method. Experiments were conducted to determine tensile strength, impact strength, hardness and chemical resistance. The results showed that the combined reinforcement effect yield the better mechanical properties with increased fiber length and particulate material. The chemical resistance of the composites was analyzed by weight loss method. It was found that the chemical resistance was more pronounced in 5 cm fiber length composites. The SEM image observation of the cross section has found the pull effect to cause the defect of the fiber in the polyester resin matrix.
hybrid composites; titanium oxide (TiO2); unsaturated polyester resin; mechanical properties; chemical resistance
https://mpm.spbstu.ru/article/2013.30.4/
MPM_2013_18_1_P04(1).pdf
RAR
RUS
35-41
ITM University
Swamy
India
Osmania University
Kumar
India
ITM University
Gupta
India
Govt. Vishwanath Yadav Tamaskar Post Graduate Autonomous College
V. Dubey
India
ITM University
Malik
India
ITM University
Das
India
Schottky-like anomaly in the low-temperature specific heat of polycrystalline Y0.3Gd0.2Sr0.5MnO3
In this paper we have synthesis of a sample of Y0.3Gd0.2Sr0.5MnO3 by solid state ceramic route method. The structural and thermodynamic properties of polycrystalline samples of Y0.3Gd0.2Sr0.5MnO3 were measured in order to investigate the effect of higher magnetic moment ion Gd and divalent Sr over Y ion. The structural transition from hexagonal to orthorhombic is observed at very high doping of Gd ion. Low temperature specific heat measurements were performed at 2-300 K at three different applied magnetic fields, which reveals the signature of Schottky-like anomaly in the present sample.
SQUID; multiferroics; heat capacity
disorder material
https://mpm.spbstu.ru/article/2013.30.5/
MPM_2013_18_1_P05.pdf
RAR
RUS
42-52
Saint Petersburg State University
E.G. Zemtsova
St.Petersburg, Russia
Saint Petersburg State University
Yurchuk
St.Petersburg, Russia
Saint Petersburg State University
Smirnov
St.Petersburg, Russia
Creation of heterogeneity on the basis of carbide nanostructures in the volume of metal (iron) matrix for regulation of mechanical properties
The process of nanostructuring of metal (iron) matrix including the directional design of carbide nanostructures on the surface of iron particles and obtaining of the compact (nonporous) material by the methods of powder metallurgy are considered The obtained material can be thought of as the material type "frame in the frame" and represents the metal frame iron, reinforced carcass of the different chemical composition on the basis of carbide (SiC, TiC). This approach will solve the problem of creation of new generation of nanostructured metal (iron-based) materials with improved functional (mechanical) properties for various technical fields.
nanostructuring; iron oxide; reduction; iron; surface; surface reaction; nanostructures; titanium carbide; composite metallic materials; mechanical properties
https://mpm.spbstu.ru/article/2013.30.6/
MPM_2013_18_1_P06.pdf
RAR
RUS
42-52
Menoufia University
Aish
Egypt
I.I. Polzunov Altai State Technical University
Starostenkov
Barnaul, Russia
Effect of volume on the mechanical properties of nickel nanowire
Molecular Dynamics (MD) simulations have been carried out on pure nickel (Ni) crystal with face-centered cubic (FCC) lattice upon application of uniaxial tension at nanolevel with a speed of 20 m/s. Morse potential was employed to carry out three dimensional molecular dynamics simulations. MD simulation was used to investigate the effect of volume of Ni nanowire on the nature of deformation and fracture. The engineering stress–time diagrams obtained by the MD simulations of the tensile specimens of these Ni nanowires show a rapid increase in stress up to a maximum followed by a gradual drop to zero when the specimen fails by ductile fracture. The feature of deformation energy can be divided into four regions: quasi-elastic, plastic, flow and failure. The nature of deformation, slipping, twinning and necking was studied. Stress decreased with increasing volume and the breaking position increases.
molecular dynamics simulation; mechanical properties; nickel nanowire
https://mpm.spbstu.ru/article/2013.30.7/
MPM_2013_18_1_P07.pdf
RAR
RUS
63-69
Belarusian State University of Informatics and Radioelectronics
Kozlova
Minsk, Belarus
Institute of Theoretical Physics and Astronomy of Vilnius University
Tamuliene
Vilnius, Lithuania
Modeling and investigations of the heterofullerenes C59X (X=Na, Li, Mg, Be)
Geometric and electronic structure of the heterofullerenes C59X (X=Na, Li, Mg, Be) has been theoretically studied. The main emphasis has been given to the stability of the heterofullerenes and their both HOMO and LUMO energies and ability to stabilize negative charge. Obtained results prove the possibility of use investigated heterofullerenes as components for solar cells.
heterofullerenes C59X; geometric and electronic structure; modeling
https://mpm.spbstu.ru/article/2013.30.8/
MPM_2013_18_1_P08.pdf
RAR
RUS
70-76
Islamic Azad University Bueenzahra Branch
Sedighi
Bueenzahra, Iran
Islamic Azad University Bueenzahra Branch
Dardashti
Bueenzahra, Iran
Payam Noor University Saveh Branch
Eslami
Saveh, Iran
Islamic Azad University Karaj Branch
Sedighi
Karaj, Iran
Layer number dependence of temperature distribution in multi-metal cookware
Multi-layer plate improves thermal, chemical and mechanical properties. Multilayered structure which is exposed to non-uniform heater provides uniform temperature distribution on other side. Numerical modeling using the finite element method has been performed to study the dependence of thermal behavior of multi-metal cookware, which is exposed to irregular heating, on number and thicknesses of layers, materials and diameter of plates. We have studied the behavior of the two important parameters in cooking including mean temperature degree and uniformity on cooking surface through variations of geometric and thermal properties. We have applied Cu, Al, SSt, CrNi, and Ti through one to four layers. The results address that bi-layer plate has the better thermal performance than one, three and four layers as cookware function.
multi-metal cookware; thermal behavior; finite element method
https://mpm.spbstu.ru/article/2013.30.9/
MPM_2013_18_1_P09.pdf
RAR
RUS
77-92
Karunya University
Selvamani
India
Government Arts College (Autonomous)
Ponnusamy
India
Generalized thermoelastic waves in a rotating ring shaped circular plate immersed in an inviscid fluid
In this paper, the generalized thermoelastic waves in a rotating ring shaped circular plate immersed in fluid are studied based on the Lord-Shulman (LS) and Green-Lindsay (GL) generalized two dimensional theory of thermoelasticity. Two displacement potential functions are introduced to uncouple the equations of motion. The frequency equations that include the interaction between the plate and fluid are obtained by the traction free boundary conditions using the Bessel function solutions. The numerical calculations are carried out for the material Zinc and the computed non-dimensional frequency, phase velocity, attenuation coefficient and relative frequency shift are plotted as the dispersion curves for the plate with thermally insulated and isothermal boundaries. The wave characteristics are found to be more dispersive and realistic in the presence of thermal relaxation time, fluid and the rotation parameter.
solid-fluid interface; perfect-slip boundary; wave propagation in a rotating plate; vibration of thermal plate; plate immersed in fluid; generalized thermoelastic plate; Bessel function
https://mpm.spbstu.ru/article/2013.30.10/
MPM_2013_18_1_P10.pdf
RAR
RUS
93-100
Institute Silicate Chemistry of Russian Academy of Science
Konakov
V.G.
St.Petersburg, Russia
Institute Silicate Chemistry of Russian Academy of Science
Solovyeva
E.N.
St.Petersburg, Russia
Scientific and Technical Center “Glass and Ceramics”
Archakov
St.Petersburg, Russia
Scientific and Technical Center “Glass and Ceramics”
Golubev
St.Petersburg, Russia
Strength of Al2O3-SiC-BN-Si3N4-based ceramics
This paper reports the development of a sturdy reactive-linked ceramics based on Al2O3(Al)-SiC-BN-Si3N4 system. Ceramic samples of different initial compositions and varied manufacturing procedure were studied by XRD; mechanical strength of these samples is discussed. It is stated that such products of chemical interactions occurring during ceramics production, as Si and AlN positively affects ceramics strength. The effect of aluminum, aluminum borates, and silicon nitride content on the strength of final ceramics is discussed.
Al2O3(Al)-SiC-BN-Si3N4-based ceramics; mechanical strength
https://mpm.spbstu.ru/article/2013.30.11/
MPM_2013_18_1_P11.pdf