Materials physics and mechanics

RAR RUS 1-8 Govt. Vishwanath Yadav Tamaskar Post Graduate Autonomous College V. Dubey

India

Govt. Vishwanath Yadav Tamaskar Post Graduate Autonomous College J. Kaur

India

Govt. Vishwanath Yadav Tamaskar Post Graduate Autonomous College N.S. Suryanarayana

India

National Institute of Technology Raipur Agrawal

India

University of Baroda Murthy

India

RTM Nagpur University Dhoble

India

Thermoluminescence and kinetics of gamma irradiated Bhutanese stone The present paper reports the photoluminescence (PL) and thermoluminescence (TL) studies of natural Bhutanese stone (Biotite) collected from Bhutan. The sample was Bhutanese stone irradiated with Co60 gamma source giving a dose from 0.5 kGy to 2 kGy. The heating rate used for TL measurements was 6.7° C/s. The heating rate used for TL measurements was 6.7° C/s. The samples shows good TL peaks, the corresponding activation energy (E) values are calculated. Structural characteristics were showed by XRD spectrum of the sample. The value of trap depth of Bhutanese stone was evaluated by different methods. Also the annealing quenching effect was studied for gamma exposure of the sample. photoluminescence; thermoluminescence; gamma irradiated Bhutanese stone; kinetic parameter https://mpm.spbstu.ru/article/2012.24.1/ MPM_2012_15_1_P01.pdf

RAR RUS 9-25 St.Petersburg State Technological Institute Proskurina

St.Petersburg, Russia

Institute of Problems of Mechanical Engineering RAS Freidin A.B.

St.Petersburg, Russia

N-7717-2016 7005519053 0000-0003-4116-4821 Institute of Problems of Mechanical Engineering RAS Kolesnikova Anna anna.kolesnikova.physics@gmail.com

St. Petersburg, Russia

7005573911 St.Petersburg State University Morozov N.F.

St.Petersburg, Russia

F-1445-2014 7202768874 0000-0003-3738-408X ITMO University Romanov Alexey alexey.romanov@niuitmo.ru

St.Petersburg, Russia

Identification of defects in a solid body on the base of surface displacements The aim of our work is to discuss how the surface displacements caused by an applied force can be used for the identification of defects placed in near-surface layers of the body. As an illustrative example of the possibility for such identification, the elastic problem for the half-space weakened by a circular hole is considered. First of all we present the complete and correct analytical solution of the plane elasticity problem for the concentrated force acting on the surface of a half-space with a hole. We describe the biharmonic stressfunction used for the derivation of stresses and strains in the half-space with a hole and the associated biharmonic function that allows to determine the displacement field. Both functions are given in the form of Fourier series with the compact coefficients. It is shown that the found analytical formulas of surface displacements give the way to find the circular hole diameter and position when the applied force and elastic modules of the material are known. defect identification; half-space weakened by a circular hole; concentrated load; elastic fields; surface displacements https://mpm.spbstu.ru/article/2012.24.2/ MPM_2012_15_1_P02.pdf

RAR RUS 26-33 Donetsk Institute for Physics and Engineering named after O.O. Galkin, National Academy of Sciences of Ukraine Pashynskaya

Donetsk, Ukraine

Institute for Problems of Materials Science named after I.I. Frantsevich, National Academy of Sciences of Ukraine Podrezov

Kiev, Ukraine

Federal budget - funded research Institute of Machines Science named after A.A. Blagonravov RAS Stolyarov

Moscow, Russia

Donetsk Institute for Physics and Engineering named after O.O. Galkin, National Academy of Sciences of Ukraine Zavdoveyev

Donetsk, Ukraine

Donetsk Institute for Physics and Engineering named after O.O. Galkin, National Academy of Sciences of Ukraine Tishchenko

Donetsk, Ukraine

Intensified movement of defects during severe plastic deformation Mechanisms of ultrafine structure formation during severe plastic deformation are considered in the work. It has been shown that during the deformation, the structure formation is determined by the mechanisms that lead to an increase in defect density and the relaxation mechanisms that lead to a decrease in the density of defects. The concept of an intensified movement of defects is involved in the work to describe the experimental data on changes in the structure and properties of materials at large plastic deformations, that provides a fairly complete picture of the formation of structure of metals and alloys. ultrafine structure; severe plastic deformation; relaxation mechanisms; defect density; intensified movement of defects https://mpm.spbstu.ru/article/2012.24.3/ MPM_2012_15_1_P03.pdf

RAR RUS 34-45 Kalasalingam University Arumuga Prabu

Tamilnadu, India

Kalasalingam University Manikandan

Tamilnadu, India

Kalasalingam University Uthayakumar

Tamilnadu, India

Friction and dry sliding wear behavior of red mud filled banana fibre reinforced unsaturated polyester composites using Taguchi approach This present article describes the effect of red mud filler on wear responses of banana fiber reinforced unsaturated polyester composites. Banana fiber treated NaOH and untreated were taken for the wear studies as reinforcement along with unsaturated polyester and red mud. Red mud, polyester and banana fiber of different weight proportions were taken by keeping the fiber length as fixed (30 mm) which is optimal ones. Compression molding technique is used for preparing the specimens. Wear studies were carried out by using a pinon- disc wear tester for the specimens prepared as per ASTM standard. Taguchi design of experiments with L9 orthogonal array is used to optimize the parameter with respect to sliding velocity, load and sliding distance. banana fiber; red mud; polyester; wear properties; Taguchi method https://mpm.spbstu.ru/article/2012.24.4/ MPM_2012_15_1_P04.pdf

RAR RUS 46-65 Bhilai Institute of Technology Kumar

India

Quality Engineering & Software Technologies Global Engineering Pvt. Ltd. (QUEST GLOBAL Engineering Pvt. Ltd.) Bansal

India

Chhatrapati Shivaji Institute of Technology Chandraker

India

Computational modeling of blast furnace cooling stave based on heat transfer analysis The three dimensional heat transfer and thermal stresses of a steel cooling stave in a blast furnace are modeled and analyzed. The temperature in a thermal stress field of cooling stave is calculated by using the finite element method software ANSYS. The radiation heat transmitted from solid materials (coke, ore, and flux) to inner surface of the cooling stave is neglected in the computational analysis. In this analysis two different types of lining materials are taken. These are the silicon carbide brick and high alumina brick. These lining materials are used at different loads, i.e., gas temperature from 773 K to 1573 K, as well as stave with skull is used at this gas temperature. Different assumptions and boundary conditions are taken in modeling as well as in analysis. Kinds of parameters are taken for the heat transfer analysis of cast steel cooling stave in a blast furnace. The water temperature is chosen as 303 K. The results indicate that the maximum temperature and thermal stress of hot face are highest in silicon carbide brick and lowest in high alumina brick. The peel stress and von Mises stress are calculated. The result indicates that the silicon carbide brick is better, so that it can withstand various circumstances which affect the life of the cooling stave and the blast furnace. Therefore the suitable lining for the stave is the silicon carbide brick. stave; ANSYS; lining; loads; peel stress; von Mises stress https://mpm.spbstu.ru/article/2012.24.5/ MPM_2012_15_1_P05.pdf

RAR RUS 66-73 Government Mohindra College Kaur

India

Punjabi University Singh

India

Shri Guru Granth Sahib World University Mudahar

India

Punjabi University Mudahar

India

Structural investigation B2O3- Li2CO3- Al2O3 glasses by molar volume measurements and FTIR spectroscopy A lithium aluminoborate glass system is prepared by the conventional melt quenching technique. The powder XR diffraction analysis of the prepared samples confirms the amorphous nature of the samples. The density and molar volume studies report the change of structure with the increase of aluminium content. The FTIR analysis of the samples revealed that the network structure of the prepared samples is mainly based on the BO3 and BO4 units. lithium aluminoborate glasses; molar volume measurements; FTIR analysis https://mpm.spbstu.ru/article/2012.24.6/ MPM_2012_15_1_P06.pdf

RAR RUS 74-77 Anna University Suresh

India

Dielectric and photoconductivity properties of L-arginine diiodate nonlinear optical single crystaly Single crystal of L-arginine diiodate was grown from aqueous solution by slow evaporation technique. The crystalline nature of the material has been confirmed by single crystal X-ray diffraction. Dielectric constant and dielectric loss measurements were carried out at different temperatures and frequencies. The photoconductivity studies reveal that the crystal exhibits negative photoconductivity. single crystal; slow evaporation technique; single crystal x-ray diffraction; dielectric studies; photoconductivity studies https://mpm.spbstu.ru/article/2012.24.7/ MPM_2012_15_1_P07.pdf

RAR RUS 78-95 59122315900 0000-0002-1572-2108 Kurukshetra University Kumar Rajneesh

Kurukshetra, India

Kurukshetra University Chawla

India

A study of Green's functions for two-dimensional problem in orthotropic magnetothermoelastic media with mass diffusion The present investigation deals with the study of Green’s functions for twodimensional problem in orthotropic magnetothermoelastic media with mass diffusion. After applying the dimensionless quantities and using the operator theory, two-dimensional general solution in orthotropic magnetothermoelastic diffusion media is derived. On the basis of general solution, the Green’s functions for a steady line on the surface of a semi-infinite orthotropic magnetothermoelastic diffusion material are constructed by four newly introduced harmonic functions. The components of displacement, stress, temperature distribution and mass concentration are expressed in terms of elementary functions. From the present investigation, some special cases of interest are also deduced and compared with the previous results obtained. The resulting quantities are computed numerically for semi-infinite magneto thermoelastic material and presented graphically to depict the effect of magnetic. Green's functions; orthotropic; magnetothermoelastic diffusion; semi-infinite; line heat source https://mpm.spbstu.ru/article/2012.24.8/ MPM_2012_15_1_P08.pdf