Materials physics and mechanics

RAR RUS 97-106 Karunya University Selvamani

India

Government Arts College (Autonomous) Ponnusamy

India

Effect of rotation in an axisymmetric vibration of a transversely isotropic solid bar immersed in an inviscid fluid Effect of rotation in a axis symmetric vibration of a finite, homogeneous transversely isotropic solid bar immersed in a fluid is studied using the linearized, threedimensional theory of elasticity. The equations of motion of solid and fluid are respectively formulated using the constitutive equations of a transversely isotropic solid bar and the constitutive equations of an inviscid fluid. Two displacement potentional functions are introduced to uncouple the equations of motion. The computed non-dimensional frequency, phase velocity and attenuation are presented in the form of dispersion curves for the material Zinc. rotating bar; free vibration of transversely isotropic bar; elastic rods loaded with fluid; wave propagation in a cylinders immersed in a fluid https://mpm.spbstu.ru/article/2012.25.1/ MPM_2012_15_2_P01.pdf

RAR RUS 107-113 Physics Research Centre, Mahatma Gandhi College Betkar

India

Physics Research Centre, Mahatma Gandhi College Bagde

India

Effect of precursor volume proportions on spray deposited EuS thin films Europium sulphide (EuS) thin films are successfully deposited on non-conductive bare silicon glass substrates by spray pyrolysis technique at various precursor volume proportions of europium chloride and thaiocatamide. The films were studied by XRD, SEM and UV-Visible spectrometry. The effect of varying precursor volume proportions was studied on morphological and optical properties. The XRD conformed polycrystalline nature. Study enlights the foremost impact of precursor volume proportions on morphological and optical properties. EuS; thin films; spray pyrolysis; volume proportion; XRD https://mpm.spbstu.ru/article/2012.25.2/ MPM_2012_15_2_P02.pdf

RAR RUS 114-118 Carnegie Mellon University Majetich Sara A. Islamic Azad University Valedbagi

Tehran, Iran

The visible wavelength diffraction from two-dimensional grating fabricated by mild anodization technique Two-dimensional diffraction grating was fabricated on aluminum plate on the basis of anodization technique. The reflective grating with interpore ranging 500 nm was prepared using mild anodization. In order to make the porous alumina arrays a single step mild anodization in 0.4 M phosphoric acid with 195 anodization voltage was employed. Interpore distances were seen 500 nm when the mild anodization technique was used. The domain size of hexagonal ordered arrays was observed with over 25 µ2 area. Optical properties of gratings were investigated using visible light sources thereby the structural details of gratings were determined. porous aluminum oxide; mild anodization; reflective diffraction grating https://mpm.spbstu.ru/article/2012.25.3/ MPM_2012_15_2_P03.pdf

RAR RUS 119-125 South Valley University Dewidar

Egypt

South Valley University Bakrey

Egypt

South Valley University Hashim

Egypt

Zagazeg University Abdel-Haleem

Egypt

South Valley University Diab

Egypt

Mechanical properties of polypropylene reinforced hemp fiber composite Hemp fibers are one of the strongest and stiffest available natural fibers and therefore have great potential for use in composite materials. This paper investigated the impact response of reinforcing polypropylene (PP) by hemp fibers. Hemp fibers were added at (30 wt.%, 33 wt.%, 35 wt.%, 37 wt.%, and 40 wt.%). Influence of fiber’s content on composite tensile strength and strain were revealed and the results show that at 33 wt.% the tensile strength of PP and hemp fiber composites was improved by 12.75 %. At 33 wt.% the fibers were longitudinally, at 45 o , horizontally, and randomly oriented. The influence of fiber’s orientation on both stress and strain of the composites was studied and the results show that the tensile strength of the composites when the fibers were longitudinally oriented was higher than that of the other fiber’s orientation. Also the tensile strength of the composites at 33 wt.% was highly improved when the fibers were weaved and the tensile strength of the composite was improved by 25.98 %. The effect of hemp fiber on the hardness of PP was deliberated where the hardness of the composite was increased by 5.77 % better than that of pure PP. polypropylene; hemp fibers; NFRPCs; tensile strength; hardness number https://mpm.spbstu.ru/article/2012.25.4/ MPM_2012_15_2_P04.pdf

RAR RUS 126-134 Institute of Problems of Mechanical Engineering RAS Aero

St.Petersburg, Russia

Institute of Problems of Mechanical Engineering RAS Bulygin

St.Petersburg, Russia

Institute of Problems of Mechanical Engineering RAS Pavlov

St.Petersburg, Russia

The Nonlinear Theory of Reorganization of Structure of Superthin Crystal Layers at Intensive Loadings Crystals with the complex lattice consisting from two sublattices are considered. Big shifts of the sublattices are investigated. The additional element of translation symmetry is put in a basis of creation of the nonlinear theory. It is characteristic for complex lattices, but earlier not entered in solid states physics. Flat and two-dimensional problems are solved for superthin crystal layers in which effects of nanoscale interactions take place. The discrete forces are considered. They are cause of boundary reorganization of molecular structure together with the continuous forces. Also numerical solutions on distribution of shock surface waves such as kinks and solitons, and also the surface perturbations are considered. double crystal lattice; nonlinear deformation of crystals; internal structure; scale effects https://mpm.spbstu.ru/article/2012.25.5/ MPM_2012_15_2_P05.pdf

RAR RUS 135-147 59122315900 0000-0002-1572-2108 Kurukshetra University Kumar Rajneesh

Kurukshetra, India

Swami Devi Dyal Institute of Engineering &Technology Sharma

Barwala, India

Deenbandhu Chhotu Ram University Garg

Murthal (Sonipat), India

Wave propagation in heat conducting transversely isotropic micropolar viscoelastic half space The present investigation deals with the wave propagation in heat conducting transversely isotropic micropolar viscoelastic half space. Lord and Shulman (1967), Green and Lindsay (1972) and coupled thermoelasticity theories are considered to investigate the problem. The phase velocity and attenuation quality factors are obtained. The expressions for amplitudes of displacement component, microrotation, temperature distribution and stress components are obtained. The resulting quantities are computed numerically and effect of viscosity on these is shown graphically. Some special cases are also introduced from the present investigation. wave propagation; heat conducting transversely isotropic micropolar viscoelastic half space https://mpm.spbstu.ru/article/2012.25.6/ MPM_2012_15_2_P06.pdf

RAR RUS 150-166 Kalasalingam University Rajesh

India

Kalasalingam University Rajakarunakaran

India

Kalasalingam University Sudhakara Pandian

India

Modeling and optimization of sliding specific wear and coefficient of friction of aluminum based red mud metal matrix composite using Taguchi method and response surface methodology Metal matrix composites (MMCs) are attracting considerable interest worldwide because of their superior mechanical and tribological properties. This investigation presents the use of Taguchi method for minimizing the specific wear and coefficient of friction in red mud based aluminum MMC. Response Surface Methodology (RSM) is also employed to develop mathematical model for specific wear rate and coefficient of friction. A plan of experiments, based on L27 Taguchi design method, the orthogonal array, signal- to- noise ratio, and analysis of variance (ANOVA) are employed to investigate the influence of parameters like applied load, sliding velocity, % of reinforcement and hardness of the counterpart material. Pin on Disc apparatus is used to conduct the experiment to analyze the effect of input parameters on output performance characteristics. From the analysis of signal to noise ratio (S/N) and ANOVA, the optimal combination levels and the effect of input parameter on output response are obtained. RSM is employed to develop mathematical model, capability of the model is good in prediction of results and results are very closer to the measured value. Analysis of variance (ANOVA) technique is applied to check the validity of the developed model. The result stress that the developed model could be effectively employed to predict the specific wear rate and the coefficient of friction. aluminum; red mud; MMC; Taguchi; response surface methodology; ANOVA https://mpm.spbstu.ru/article/2012.25.7/ MPM_2012_15_2_P07.pdf

RAR RUS 167-172 Islamic Azad University Bavadi

Tehran, Iran

Islamic Azad University Valedbagi

Tehran, Iran

Physical properties of titanium nitride thin film prepared by DC magnetron sputtering The physical properties of the titanium nitride thin film have been prepared on p-type silicon (100) substrates by at room temperature by reactive DC magnetron sputtering technique using pure Si target with varying oxygen partial pressure during growth at reported. The oxygen partial pressure in the growth chamber is varied between (97 % argon) and (3 % oxygen). The X ray diffraction (XRD) analysis showed that all the films were polycrystalline. titanium nitride; XRD; AFM; sputtering https://mpm.spbstu.ru/article/2012.25.8/ MPM_2012_15_2_P08.pdf

RAR RUS 173-179 Kalasalingam University Arumuga Prabu

Tamilnadu, India

Kalasalingam University Manikandan

Tamilnadu, India

Kalasalingam University Uthayakumar

Tamilnadu, India

Kalasalingam University Kalirasu

India

Investigations on the mechanical properties of red mud filled sisal and banana fiber reinforced polyester composites Addition of red mud (an industrial waste) in to sisal fiber, banana fiber reinforced unsaturated polyester (USP) is discussed in this study. Red mud is the caustic insoluble waste residue generated during the alumina production from bauxite. Composites were fabricated separately with sisal/USP, banana/USP and each of them was filled with red mud also through compression molding process. Static mechanical tests like tensile, flexural, impact were conducted as per ASTM. Experimental results show that the addition of red mud promotes a marginal increase in the mechanical strength. red mud; natural fiber; USP; SEM; polymer composite https://mpm.spbstu.ru/article/2012.25.9/ MPM_2012_15_2_P09.pdf