Materials physics and mechanics

RAR RUS 1-19 59122315900 0000-0002-1572-2108 Kurukshetra University Kumar Rajneesh

Kurukshetra, India

Kurukshetra University Bansal

India

Kurukshetra University Gupta

India

Reflection and transmission at the interface of an elastic and two-temperature generalized thermoelastic half-space with fractional order derivative The present investigation is concerned with the reflection and transmission at elastic half-space and a two-temperature generalized thermoelastic half-space with fractional order derivative. The governing equations in the context of the theory of two-temperature generalized thermoelasticity using the methodology of fractional calculus are used to investigate the problem. The incident wave is assumed to be striking at the plane interface after propagating through the elastic solid half-space. It is found that the amplitude ratios of various reflected and refracted waves are functions of the angle of incidence and frequency of the incident wave. These amplitude ratios are influenced by the fractional-order thermoelastic properties of media. The expressions of amplitude ratios and energy ratios have been computed numerically for a particular model. The variations of energy ratios with the angle of incidence are shown graphically. The conservation of energy at the interface is verified. 10.18149/MPM.4712021_1 fractional temperature elastic reflection transmission https://mpm.spbstu.ru/article/2021.80.1/ 1-Kumar-et-al.pdf

RAR RUS 20-30 0000-0001-8407-8144 Ogarev Mordovia State University Erofeev

Saransk, The Republic of Mordovia, Russia

Mordovia State University N.P. Ogareva Ivlev

Saransk, Russia

Mordovia State University N.P. Ogareva Sigachyov

Saransk, Russia

Mordovia State University N.P. Ogareva Fomin

Saransk, Russia

Ogarev Mordovia State University Yudin

Saransk, The Republic of Mordovia, Russia

Tambov State Technical University Blohin

Tambov, Russia

Tambov State Technical University Yel'chishcheva

Tambov, Russia

Tambov State Technical University Suhorukov

Tambov, Russia

Tambov State Technical University Tkachev

Tambov, Russia

Mechanical properties of epoxy resin with additives soot and nanotubes The article presents the results of a study of a composite material based on epoxy-diano resins containing a nanocarbon dispersed filler. The effect of small soot and carbon nanotube inclusions on the change in the mechanical characteristics of the cured epoxy resin ED-20 depending on the degree of filling was investigated. Measurements of the ultimate strength, effective modulus 10.18720/MPM.4712021_2 epoxy composites soot nanotubes strength plasticity https://mpm.spbstu.ru/article/2021.80.2/ 2-Ivlev-et-al.pdf

RAR RUS 31-39 Diponegoro University Sulardjaka

Indonesia

Diponegoro University Nugroho

Indonesia

Diponegoro University Iskandar

Indonesia

Mechanical properties of AlSiMg/SiC and AlSiMgTiB/SiC produced by semi-solid stir casting and high pressure die casting Mechanical properties of the AlSiMg/SiC and AlSiMgTiB/SiC composites produced by high pressure die casting (HPDC) are investigated. The mixture of ADC 11, master alloy AlMg, master alloy AlTiB and 99 % aluminium were used as metal matrix. A reinforcement particle was represented by high purity silicon carbide with an average particle size mesh 400. Aluminium matrix and SiC particle with the content: 5 %, 7.5 %, and 10 % wt were mixed by the semi-solid stir casting method. The stirring process was performed by 45o degree carbide impeller at a rotation of 600 rpm and temperature of 570oC for 15 minutes. The mixture of AlSiMg/SiC and AlSiMgTiB/SiC were shaped into the specimen by HPDC. Mechanical characterizations of composite specimens were done in hardness, tensile and impact tests. The density of the composites was also determined. The results have shown that adding SiC improves the hardness, tensile strength of the AlSiMg/SiC and AlSiMgTiB/SiC. The increase of % wt SiC decreases the impact resistance of the composites tested. The addition of TiB increases the hardness and ultimate tensile strength and ductility. A higher of % wt of SiC porosity of composite increases. This physical quantity was lower at the composite with TiB than without this type of ingredient. TiB caused grain refining of the matrix and enhances the mechanical properties of composites. 10.11585/MPM.4712021_3 Aluminium Matrix Composite HPDC mechanical properties https://mpm.spbstu.ru/article/2021.80.3/ 3-Sulardjaka-et-al.pdf

RAR RUS 40-51 Institute for Problems in Mechanical Engineering of the Russian Academy of Sciences Shtegman

St.Petersburg, Russia

Technische Universität Berlin Morozov

Berlin, Germany

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

St.Petersburg, Russia

IBM Research, Zurich Research Laboratory Müller

Rüschlikon, Switzerland

On buckling induced by a chemical reaction This study is concerned with the modeling of plate buckling induced by a chemical reaction and is inspired by the observation that buckling may be a mechanism of stress relaxation in Si-based anodes in Li-ion batteries. A chemical reaction is localized at a sharp interface and accompanied by transformation strains, which produce internal stresses. If external supports restrict the deformation of the plate, buckling may occur. At the same time, mechanical stresses affect the kinetics of the reaction. The chemical affinity tensor concept allows us to couple the stresses with the chemical reaction rate. We formulate a coupled problem for a plate with two reaction fronts and find the critical thickness of the transformed material and the time before buckling. The influence of the material and geometrical parameters on the buckling occurrence and the time until buckling is studied 10.11585/MPM.4712021_4 mechanochemistry plate buckling chemical affinity tensor chemical reaction kinetics diffusion internal stresses https://mpm.spbstu.ru/article/2021.80.4/ 4-Shtegman-et-al.pdf

RAR RUS 52-58 Ioffe Institute Butenko

St.Petersburg, Russia

0000-0003-4205-3226 Ioffe Institute Guzilova L.I.

St.Petersburg, Russia

Ioffe Institute Chikiryaka

St.Petersburg, Russia

Ioffe Institute Pechnikov

St.Petersburg, Russia

Institute of Problems of Mechanical Engineering RAS Grashchenko

St.Petersburg, Russia

Ioffe Institute Pozdnyakov

St.Petersburg, Russia

Ioffe Institute Nikolaev

St.Petersburg, Russia

Wear resistance of α- and β- gallium oxide coatings Mechanical wear resistance of the α- and β- Ga2O3 polymorphs is experimentally studied. We report about tribological cyclic tests of these wide-band-gap semiconductor crystals. To the best of our knowledge, this is the first attempt at considering these crystals as protective coatings. The crystalline layers were deposited on sapphire substrates by vapour-phase epitaxy. This method allows applying coatings on large areas and surfaces of complex shapes, including the surfaces of a number of metals. It has been revealed, that both polymorphs are highly wear-resistant, and suddenly have a very low coefficient of friction. The α- Ga2O3 layers with the corundum structure exhibit wear coefficient values commensurate with those of sapphire and gallium nitride. 10.11585/MPM.4712021_5 gallium oxide protective coatings tribology coefficient of friction COF wear resistance https://mpm.spbstu.ru/article/2021.80.5/ 5-Butenko-et-al.pdf

RAR RUS 59-64 Ioffe Institute Nikolaev

St.Petersburg, Russia

Ioffe Institute Timashov

St.Petersburg, Russia

Peter the Great St. Petersburg Polytechnic University Pulnev

St.Petersburg, Russia

0000-0003-4205-3226 Ioffe Institute Guzilova L.I.

St.Petersburg, Russia

Ioffe Institute Butenko

St.Petersburg, Russia

Ioffe Institute Stepanov

St.Petersburg, Russia

Jumping at strain recovery in shape memory Cu-Al-Ni single crystals Shape memory Cu-Al-Ni single crystals of two alloy compositions Cu 82.5 wt.% - Al 13.5 wt.% - Ni 4.0 wt.% and Cu 81.98 wt.% - Al 14.02 wt.% - Ni 4.0 wt.% have been studied in view of their ability to undergo spontaneous jumping during reverse martensitic transformation. Crystals of both alloys were compressively deformed up to a full shape memory strain (8%) at room temperature. It was found that specimens of the first alloy with martensite structure jumped higher and demonstrated better reproducibility in cyclic tests. The height of the jump strongly depended on thermal pre-treatment and was unaffected by the strain rate during pre-strain by compression and the heating rate at shape recovery. 10.11585/MPM.4712021_6 shape memory shape memory effect SM shape memory alloys SMA single crystals strain recovery jumping https://mpm.spbstu.ru/article/2021.80.6/ 6-Nikolaev-et-al-(3).pdf

RAR RUS 65-73 Motilal Nehru National Institute of Technology Allahabad Kumar

India

Motilal Nehru National Institute of Technology Allahabad Bharti

India

Motilal Nehru National Institute of Technology Allahabad Kumar

India

Motilal Nehru National Institute of Technology Allahabad Nigam

India

Effect of process parameters on the crystal-parameters of Cu-Zn spinel-ferrites Spinel ferrite nano-powders are highly useful in applications such as drug-delivery, ferrofluids, gas sensors, etc. because of their semiconductor and ferromagnetic properties. There are various methods by which the spinel ferrites can be synthesized, i.e., hydro-thermal route, solid-state route, sol-gel route, thermal deposition route, mechanical milling, etc. In this work, nano-crystalline Cu-Zn ferrites with the composition of (Cu0.4Zn0.6Fe2O4) were synthesized from metal nitrate and acetate precursors by the hydro-thermal route and sol-gel auto-combustion route. Citric acid was used as a fuel to increase the rate of reaction. Synthesized powders were heat-treated for different holding time. The crystal structures of these compounds were characterized by X-ray diffraction (XRD). The crystal size and lattice parameter were determined by using Maud analysis and Williamson-hall plots. The Rietveld analysis and X'Pert Highscore peak match analysis confirmed the formation of single-phase Cu0.4Zn0.6Fe2O4. It was observed that crystallite size and peak intensity increased after heat treatment. Also, on increasing the holding time of heat treatment, an increase in the peak intensity and crystallite size was observed. 10.11585/MPM.4712021_7 copper zinc spinel ferrite hydro-thermal sol-gel heat-treatment https://mpm.spbstu.ru/article/2021.80.7/ 7-Kumar-et-al.pdf

RAR RUS 74-88 Joint-Stock Company Research Institute of Nuclear Materials Karagergi

Zarechny, Sverdlovsk region, Russia

Joint-Stock Company Research Institute of Nuclear Materials Evseev

Zarechny, Sverdlovsk region, Russia

Joint-Stock Company Research Institute of Nuclear Materials Kozlov

Zarechny, Sverdlovsk region, Russia

Distribution of plastic deformation along the perimeter of circular specimen of thin-wall fuel-element cladding during its expansion The method of measuring short-time mechanical properties of materials of cladding tubes during the process of expansion of circular specimens is conventional in reactor material science. One of the method limitations is procedure errors caused by the specimen bending on the semicylindrical supports at the initial stage of expansion. The bending induces inhomogeneous plastic deformation of the specimen working parts, which results in the inaccurate evaluation of the yield strength and the plastic properties of the material. This paper contains an analysis of the plastic strain distribution at the different stages of the expansion of the circular specimens of a cladding tube made of austenite steel. The results of the comparison between the true relative deformation and the estimated deformation of the working part are presented together with the assessment of the impact of strain hardening of the material on its mechanical properties. 10.11585/MPM.4712021_8 cladding tubes circular specimen semicylindrical supports ovalization mechanical properties plastic strain and true relative deformation https://mpm.spbstu.ru/article/2021.80.8/ 8-Karagergi-et-al.pdf

RAR RUS 89-102 Peter the Great St. Petersburg Polytechnic University Shel

St.Petersburg, Russia

Asymptotical regimes of the hydrofracturing planar 3D model In the proposed paper the Planar 3D model of hydraulic fracturing was investigated. All of the hydraulic fracturing equations were substituted into the mass conservation law and scaled. Nontrivial dimensionless parameters of the problem were found. Asymptotic regimes of the equation, the Radial or the Pseudo3D model, correspond to the infinitely small or the infinitely large dimensionless parameters. Thus, the limiting conditions of these models were found in the terms of the dimensionless parameters. 10.11585/MPM.4712021_9 hydraulic fracturing geomechanics Planar3D model Pseudo3D model fracture propagation regimes https://mpm.spbstu.ru/article/2021.80.9/ 9-E_V_-Shel.pdf

RAR RUS 103-116 Higher Institute for Applied Sciences and Technology (HIAST) Fadi Alzarzouri

Damascus, Syria

Higher Institute for Applied Sciences and Technology (HIAST) Rafi Jabra

Damascus, Syria

Damascus University Fawaz Deri

Damascus, Syria

Melt rheological behaviour and mechanical properties of poly(lactic acid)/high density polyethylene blends In this study, poly(lactic acid) was melt blended with high density polyethylene to investigate the rheological and mechanical properties of these blends. The rheological properties were characterized where viscous properties were evaluated in the molten state. In studying the viscous properties, non-Newtonian index (n), apparent viscosity, and the flow activation energy were determined. Mechanical properties were studied in terms of tensile properties, i.e. ultimate tensile strength, Young's modulus, elongation, and total energy at fracture. The results showed that PLA/HDPE blends and their pure components behave pseudoplastically (n 10.11585/MPM.4712021_10 PLA HDPE polymer blends viscosity rheological properties https://mpm.spbstu.ru/article/2021.80.10/ 10-Alzarzouri-et-al.pdf

RAR RUS 117-122 Russian Federal Nuclear Center, All-Russia Research Institute of Experimental Physics Buzoverya

Sarov, Russia

Sarov Physics Technical Institute National Research Nuclear University “MEPhI” Scherbak

Sarov, Russia

Ogarev Mordovia State University Cherkasov

Saransk, Russia

0000-0003-4310-3379 Vyatka State University Yurkin

Kirov, Russia

0000-0002-1069-2413 Ogarev Mordovia State University Avdonin

Saransk, Russia

Vyatka State University Suntsov

Kirov, Russia

Ogarev Mordovia State University Pilshchikov

Saransk, Russia

Results of the surface morphology study of elastic self-adhesive radiation shielding coatings by atomic force microscopy An algorithm for studying the structure of radiation shielding materials using the atomic force microscopy (AFM) method has been developed and described. Using the proposed method, the structure of tungsten-containing radiation shielding materials was studied and the difference in the microstructure of the samples and the nature of the distribution of the filler was revealed. 10.18720/MPM.4712021_11 composite material radiation shielding elastic self-adhesive coatings linear absorption coefficient microstructure https://mpm.spbstu.ru/article/2021.80.11/ 11-Buzoverya-et-al.pdf

RAR RUS 123-130 Belarusian State University of Informatics and Radioelectronics Boiprav Olga V.

Minsk, Belarus

Belarusian State University of Informatics and Radioelectronics Pevneva

Minsk, Belarus

University of Zawia Ayad

Az-Zawiyah, Libya

Development and study of multilayer electromagnetic radiation shields based on powdered oxide-containing materials The electromagnetic shields in the form of two-layer structures, the surface layer of which was the composite material with filler based on powdered titanium dioxide, and the inner one was the composite material with filler based on iron oxide, have been developed. The electromagnetic radiation reflection and transmission characteristics of the developed shields have been studied in the frequency range 0.7-142.8 GHz depending on the content of their inner layers. It has been found that electromagnetic radiation reflection and transmission coefficient values in the frequency range 0.7-142.8 GHz of the developed shields are –4.0…–27.0 dB and –10.0…–40.0 dB respectively. It has been experimentally proved that by impregnating by the calcium chloride aqueous solution of the powdered material that is part of the inner layer of such shields, it is possible to reduce by 5.0...45.0 dB of their electromagnetic radiation transmission coefficient values in the frequency range 2.0...26.0 GHz. 10.18720/MPM.4712021_12 electromagnetic radiation iron oxide shield titanium dioxide https://mpm.spbstu.ru/article/2021.80.12/ 12-Boiprav-et-al.pdf

RAR RUS 131-138 Bannari Amman Institute of Technology Selvi

India

Nandha Arts and Science College Anitha

India

Impacts of couple stress on S-waves in a pre-stressed anisotropic sandy medium The effect of initial stress, dry sand with couple stress on shear wave propagation in an inhomogeneous, anisotropic, thinly layered laminated medium is studied. The shear wave velocity for the particular problem has been obtained. The derived velocity expression has been computed numerically for specific rigidity parameter, density parameter, initial stress parameter, anisotropic factor, sand parameter, couple stress parameter as well as wave number, and the outcomes are shown graphically. 10.18720/MPM.4712021_13 incompressible anisotropic initial stress couple stress sand https://mpm.spbstu.ru/article/2021.80.13/ 13-Selvi%2C-Anitha.pdf

RAR RUS 139-158 Institute of applied physics of the Russian Academy of Sciences (IAP RAS) Britenkov

Nizhny Novgorod, Russia

Institute of Mechanical Engineering Problems of the Russian Academy of Sciences (IPM RAS) Rodyushkin

Nizhny Novgorod, Russia

Institute of Mechanical Engineering Problems of the Russian Academy of Sciences (IPM RAS), Ilyakhinsky

Nizhny Novgorod, Russia

Acoustic sensing study of the physical and mechanical properties of titanium alloy Ti-6Al-4V, made by selective laser melting To carry out calculations in the development of low-frequency hydroacoustic transducers, data on the physical and mechanical properties of structural materials, such as density, Young's modulus, Poisson's ratio, and ultimate strength, are required. For the manufacture of the emitting shell (body) of the transducer, specific material is used, obtained by the method of Selective Laser Melting (SLM). The material made by this technology often has parameters that differ significantly from the tabular data. The paper presents the results of studies of the physical and mechanical properties of the titanium alloy Ti-6Al-4V, obtained by the SLM-method. The studies were carried out by the method of elastic waves and destructive action. The research results are used for modeling and calculating the parameters of hydroacoustic emitter housings, manufactured using 3D printing from metal powders. 10.11585/MPM.4712021_14 titanium non-destructive testing hydroacoustic radiator elastic waves ultimate strength hydroacoustics transducer of longitudinal-bending type emitting shell mechanical transformer https://mpm.spbstu.ru/article/2021.80.14/ 14-Britenkov%2C-Rodyshkin.pdf