https://www.elibrary.ru/title_about_new.asp?i
1605-8119
Materials physics and mechanics
47
2
2021
1-239
RAR
RUS
159-169
Khan
Indian Institute of Technology Roorkee
Roorkee, India
Iqbal
Indian Institute of Technology Roorkee
Roorkee, India
Bratov
Institute for Problems of Mechanical Engineering of the RAS
St.Petersburg, Russia
7005573911
Morozov
N.F.
St.Petersburg State University
St.Petersburg, Russia
Gupta
Indian Institute of Technology Delhi
New Delhi, India
Ballistic resistance of ceramic metallic target for varying layer thicknesses
The ballistic behaviour of a bi-layer ceramic-metal target against steel projectile with varying layer thicknesses has been investigated using a three dimensional finite element model. The bi-layer target was made of alumina 99.5 % ceramic front layer and aluminium 2024-T3 metallic back layer with an areal dimension of 100 × 100 mm and the thickness of both layers were varied, with the total thickness of the composite being kept as 10 mm and 20 mm. A steel 4340 cylindrical blunt nosed projectile was used with 30 grams mass and 10.9 mm diameter. The Johnson- Holmquist 2 (JH-2) constitutive model was used for reproducing the high strain behavior of alumina and Johnson-Cook (JC) model was used for aluminium alloy and steel. The impact velocity of the projectile was varied in the range 200-700 m/s for 10 mm total thickness and 500-800 m/s in case of 20 mm total thickness for studying the effects of thickness ratios on ballistic resistance of the bi-layer target. The residual velocities were compared and the ratio of front to back layer providing highest ballistic limit velocity was found for both the cases.
10.18149/MPM.4722021_1
Ballistic resistance
Ceramic-metallic target
ballistic limit velocity
https://mpm.spbstu.ru/article/2021.81.1/
1-M_K_-Khan%2C-M_A_-Iqbal%2C-V_-Bratov%2C-N_F_-Morozov%2C-N_K_-Gupta.pdf
RAR
RUS
170-185
Hendy
Northern Border University
Arar, Saudi Arabia
El-Attar
Al Arish University
Al Arish, Egypt
Ezzat
Alexandria University
Alexandria, Egypt
Thermoelectric viscoelastic spherical cavity with memory-dependent derivative
We apply the memory-dependent derivative theory of thermoelasticity to the one-dimensional problem for a viscoelastic spherical cavity subjected to thermal loading. The predictions of the theory are discussed and compared with those for the coupled theory of thermoelasticity.
10.18149/MPM.4722021_2
thermo-viscoelasticity
thermoelectric properties
memory-dependent derivative
spherical cavity
Laplace transforms
numerical results
https://mpm.spbstu.ru/article/2021.81.2/
2-Mohamed-H_-Hendy%2C-Sayed-I_-El-Attar%2C-Magdy-A_-Ezzat.pdf
RAR
RUS
186-195
Kashtanova
Institute for Problems in Mechanical Engineering of the Russian Academy of Sciences
St.Petersburg, Russia
Rzhonsnitskiy
Saint-Petersburg State Institute of Technology
St.Petersburg, Russia
Gruzdkov
Saint-Petersburg State Institute of Technology
St.Petersburg, Russia
On the issue of analytical derivation of stress state in a cylindrical shell with a circular hole under axial tension
The stress field in the cylindrical shell with the circular hole is considered. Thoroughly analyzing previous works we concluded that up to the present there are no explicit formulae useful for applications despite numerous works on this subject. Moreover, the classical analytical approach lacks a rigorous mathematical foundation. Its applicability is limited to cases that slightly differ from the plane Kirsch problem. The numerical results of various researches show a significant discrepancy. This paper proposes a new analytical approach based on a different form of representation for the fundamental system of solutions of governing equations. Since, in contrast to previous works, cutting of series is not required the boundary conditions are satisfied with a very high degree of accuracy. Our model works in all ranges that mechanics allows and there are no mathematical restrictions. Some numerical results are presented.
10.18149/MPM.4722021_3
cylindrical shell
cutouts
stress state
circular hole
elasticity theory
https://mpm.spbstu.ru/article/2021.81.3/
3-S_V_-Kashtanova%2C-A_V_-Rzhonsnitskiy%2C-A_A_-Gruzdkov.pdf
RAR
RUS
196-218
0000-0000-0000-0001
Kumar
Kurukshetra University Kurukshetra
Kurukshetra, India
Sharma
Kurukshetra University
India
Some theorems and wave propagation in a piezothermoelastic medium with two-temperature and fractional order derivative
Wave propagation and some basic theorems like variational principle, uniqueness theorem, and theorem of reciprocity are studied for an anisotropic piezothermoelastic solid with two-temperature and fractional order derivative. The basic governing equations are used to study the interesting problem. Also, we characterize an alternative formulation of the mixed initial boundary value problem. These theorems are also summarised for a special case of orthotropic piezothermoelastic solid with the consideration of two-temperature theory and fractional order derivative. The non-trivial solution of the system is insured by a quartic equation whose roots represent the complex velocities of four attenuating waves in the medium. The different characteristics of the waves like phase velocity and attenuation quality factor are plotted three-dimensionally with the change in direction for two different models. Some special cases are also deduced from the present investigation.
10.18149/MPM.4722021_4
piezothermoelastic
orthotropic
variational principle
uniqueness
plane waves
phase velocity
https://mpm.spbstu.ru/article/2021.81.4/
4-Rajneesh-Kumar%2C-Poonam-Sharma.pdf
RAR
RUS
219-236
Akhtar
Jamia Millia Islamia
India
Hasan
Jamia Millia Islamia
India
Modified dugdale model for multiple circular arc-cracks with unified plastic zones: a complex variable approach
A crack arrest model is presented in this paper for multiple circular arc-cracks with coalesced yield zones. The geometry of cracks discussed in the article assumes as a prelude to the case of two equal circular arc-cracks. Further, the influence of variable stress distribution on the rims of the cracks is studied. Analytical expressions for stress intensity factors and applied load ratios are obtained using the complex variable method. Numerical results are obtained for applied load ratio, yield zone length, and reported graphically.
10.18149/MPM.4722021_5
circular-arc cracks
Dugdale strip-yield model
yield zone length
stress intensity factor
https://mpm.spbstu.ru/article/2021.81.5/
5-Naved-Akhtar%2C-S_-Hasan.pdf
RAR
RUS
237-244
Poletaev
Altai State Technical University,
Barnaul, Russia
Rakitin
Altai State University
Barnaul, Russia
Molecular dynamics study of stress-strain curves for γ-Fe and Hadfield steel ideal crystals at shear along the <111> direction
The molecular dynamics method was used to simulate the shear along the direction in Hadfield steel and a pure fcc Fe crystal. The stress-strain curves are obtained depending on the shear rate, the size of the computational cell, and temperature. It is shown that the shear rate in the range of 10–100 m/s has little effect on the theoretical strength at a constant temperature. With increasing temperature, the slope of the stress-strain dependences in the elastic region decreased, which is due to the temperature dependence of the elastic moduli. In addition, the temperature significantly influenced the theoretical strength – with an increase in temperature, plastic deformation began in ideal crystals at lower deformation values. Moreover, this dependence was more pronounced for a pure fcc Fe crystal than for Hadfield steel, which initially had structural imperfections caused by the presence of impurities that facilitate the initiation of plastic shears in a pure crystal. In this regard, at medium and low temperatures, the theoretical strength of pure iron was higher than that of steel. But at high temperatures (above 1200 K), its values for both materials became almost the same.
10.18149/MPM.4722021_6
molecular dynamics
theoretical strength
stress-strain curve
Hadfield steel
https://mpm.spbstu.ru/article/2021.81.6/
6-G_M_-Poletaev%2C-R_Y_-Rakitin.pdf
RAR
RUS
245-253
Rajkumar
India
Prakash
India
Salunkhe
India
Jayavelu
India
Investigation of wear behaviour of duplex stainless steels (DSS) using design of experiments
10.18149/MPM.4722021_7
wear
duplex stainless steels
design of experiments
powder metallurgy
https://mpm.spbstu.ru/article/2021.81.7/
7-C_Rajkumar%2C-J_Udaya-Prakash%2C-Sachin-Salunkhe%2C-S_Jayavelu.pdf
RAR
RUS
254-265
Knyazeva
Institute of Strength Physics and Materials Science
Tomsk, Russia
Kryukova
Institute of Strength Physics and Materials Science of Siberian Branch of Russian Academy of Sciences
Tomsk, Russia
The synthesis of composites with reinforcing particles on a thin substrate
The article proposes the model for synthesizing a composite coating "intermetallic matrix-reinforcing oxide inclusions" on a substrate under controlled heating by an external moving heat source. The problem is solved in dimensionless variables. The study reveals the main criteria determining the composition of the fabricated composite. It is discovered that, depending on the treatment conditions, the matrix composition may include the main total product or residual unspent reagents and intermediate products, which testifies the nonequilibrium composition of the composite.
10.18149/MPM.4722021_8
electron beam treatment
chemical reaction
numerical modeling
https://mpm.spbstu.ru/article/2021.81.8/
8-A_G_-Knyazeva%2C-O_N_-Kryukova.pdf
RAR
RUS
266-284
Nandiyanto
Universitas Pendidikan Indonesia
Bandung, Indonesia
Triawan
Sampoerna University
Indonesia
Fiandini
Universitas Pendidikan Indonesia
Bandung, Indonesia
Suryani
Sampoerna University
Jakarta, Indonesia
Sunnardianto
Sampoerna University
Indonesia
Influence of the size of turmeric microparticles reinforcing agent on mechanical and biodegradation properties of cornstarch-based bioplastic material: current studies, experimental results, and proposal material crack phenomena during mechanical t
The purpose of this study was to investigate the effect of sizes of turmeric microparticles (as a reinforcing agent) on the mechanical and biodegradation properties of cornstarch-based bioplastic material. The following fabrication procedures were performed: (1) diluting cornstarch in water; (2) making homogeneous mixture of cornstarch, glycerol and acetic acid by heating at less than 100ºC, (3) additional turmeric with a specific size (i.e. 250, 125, 100, 74 μm); (4) molding process; and (5) drying process to obtain solid bioplastic materials. This study shows the importance of reinforcing agent size for improving the mechanical properties of bioplastic materials. The smaller turmeric size brings better mechanical properties than the larger turmeric size that has more void space. To support the analysis, the present study also was completed with a literature review regarding bioplastic production and proposal bioplastics material crack phenomena during mechanical testing.
10.18149/MPM.4722021_9
bioplastics
cornstarch
particle size
mechanical properties
turmeric
https://mpm.spbstu.ru/article/2021.81.9/
9-A_B_D_-Nandiyanto%2C-F_-Triawan%2C-M_-Fiandini%2C-I_O_-Suryani%2C-G_-K_-Sunnardianto.pdf
RAR
RUS
285-292
Ryzhenkov
National Research University "Moscow Power Engineering Institute"
Moscow, Russia
Volkov
National Research University "Moscow Power Engineering Institute"
Moscow, Russia
Mednikov
National Research University "Moscow Power Engineering Institute"
Moscow, Russia
Tkhabisimov
National Research University "Moscow Power Engineering Institute"
Moscow, Russia
Zilova
National Research University "Moscow Power Engineering Institute"
Moscow, Russia
Sidorov
National Research University "Moscow Power Engineering Institute"
Moscow, Russia
Results of measurements of substrate deformation and determination by bending of internal stresses in Ti-TiC-DLC coating obtained by using HiPIMS technology
The paper presents the results of studies of internal stresses in ion-plasma coating Ti-TiC-DLC. A method based on measuring the deformation of the substrate was used to carry out this research. Plates of 08kp steel were used as a substrate, the geometry of which was chosen based on their further application for droplet erosion testing and determination of stresses arising in the coating under high-speed drop impact. A technique is presented for conducting research on substrates with a geometry that is changed in comparison with the classical configuration used to determine the internal stresses in the coating by the bending method. Bending values were obtained from the surface profiles obtained before and after coating, which were used to calculate stresses by using the Stoney formula. Application of the selected coating leads to the appearance of compressive stresses ranging from 3 to 9 GPa.
10.18149/MPM.4722021_10
stress measurement
diamond-like carbon coatings
high power impulse magnetron sputtering
droplet erosion
https://mpm.spbstu.ru/article/2021.81.10/
10-Tkhabisimov-et-al.pdf
RAR
RUS
293-305
Vnuk
Federal Scientific Research Centre "Crystallography and Photonics" of the Russian Academy of Sciences
Shatura, Moscow Region, Russia
Ippolitov
Federal Scientific Research Centre "Crystallography and Photonics" of the Russian Academy of Sciences
Shatura, Moscow Region, Russia
Kamaev
Federal Scientific Research Centre "Crystallography and Photonics" of the Russian Academy of Sciences
Shatura, Moscow Region, Russia
Markov
Federal Scientific Research Centre "Crystallography and Photonics" of the Russian Academy of Sciences
Shatura, Moscow Region, Russia
Nikulenko
Central Aerohydrodynamic Institute "TsAGI"
Zhukovsky, Moscow Region, Russia
Novikov
Federal Scientific Research Centre "Crystallography and Photonics" of the Russian Academy of Sciences
Shatura, Moscow Region, Russia
Cherebylo
Federal Scientific Research Centre "Crystallography and Photonics" of the Russian Academy of Sciences
Shatura, Moscow Region, Russia
Study of the influence of technological features of laser stereolithography process on functional characteristics of parts
The article reports on the effect the building orientation of the part, produced by laser stereolithography technology, has on achieving its best functional characteristics. Based on the example of IPLIT-3 and IPLIT-4 resins, the study shows that in contrast to the literature data on other commercial photocurable resins (PCRs), there is no definite advantage of the vertical orientation of the test samples compared to their horizontal orientation for obtaining the best values of the manufactured part functional characteristics.
10.18149/MPM.4712021_11
additive technologies
laser stereolithography
photopolymerization
three-dimensional modeling
photocurable resin
https://mpm.spbstu.ru/article/2021.81.11/
11-E_V_-Ippolitov-et-al.pdf
RAR
RUS
306-314
Kumar
Motilal Nehru National Institute of Technology Allahabad
India
Singh
Motilal Nehru National Institute of Technology Allahabad
India
Nigam
Motilal Nehru National Institute of Technology Allahabad
India
Rajpoot
Motilal Nehru National Institute of Technology Allahabad
India
Yadav
Motilal Nehru National Institute of Technology Allahabad
India
Singh
Motilal Nehru National Institute of Technology Allahabad
India
Prakash
Motilal Nehru National Institute of Technology Allahabad
India
Singh
Motilal Nehru National Institute of Technology Allahabad
India
Structural and magnetic properties of zinc doped copper ferrite synthesized by sol-gel and hydrothermal route
In this work, Cu-Zn spinel ferrites having chemical formula Cu(1-x)ZnxFe2O4 for x ranging from 0.2 to 0.8 were synthesized by sol-gel auto-combustion method and hydrothermal method with a step size of 0.2. The effect of Zn doping on structural properties, crystallite size, and magnetic properties synthesized by both methods are reported. Rietveld refinement of the XRD patterns was analyzed using Maud for the determination of crystallite size. The X-ray diffraction pattern shows that single phase Cu-Zn spinel ferrite was formed, and it has a cubic structure. Additionally, the lattice parameter size increases with Zn doping and then decreases after x=0.6. A vibrating sample magnetometer (VSM) was done to determine magnetic properties like saturation magnetization (Ms), remanence (Mr), and coercivity (Hc). The scanning electron microscopy (SEM) shows the morphology and confirms the average particle size.
10.18149/MPM.4722021_12
copper
hydrothermal
sol-gel
spinel ferrite
zinc
https://mpm.spbstu.ru/article/2021.81.12/
12-Naveen-Kumar%2C-Deepak-Singh%2C-Abhishek-et-al(1).pdf
RAR
RUS
315-343
Melker
A.I.
Peter the Great St. Petersburg Polytechnic University
St.Petersburg, Russia
Krupina
Peter the Great St. Petersburg Polytechnic University
St.Petersburg, Russia
0000-0002-3012-1407
Matvienko
Peter the Great St. Petersburg Polytechnic University
St.Petersburg, Russia
Nucleation and growth of fullerenes and nanotubes having four-fold symmetry
We have studied possible ways of generating and growing the fullerenes having four-fold symmetry. Beginning with cyclobutane C 4 H 8 and clusters C 8 , we obtained elementary fullerenes C 8 and mini-fullerenes C 16 , which produce the following fullerenes from C 24 to C 64 , perfect (basic) and imperfect, as well as nanotubes. The imperfection is connected either with extra 'interstitial' or 'vacancy' carbon dimers, both types of dimers playing the role of defects. Only the basic fullerenes C 24 , C 32 , C 40 , C 48 , C 56, and C 64 have the ordinary four-fold symmetry in the corresponding column of the periodic system of fullerenes, the intermediate fullerenes having no such symmetry. Considering the latter as imperfect due to defects, one can define them as the fullerenes conserving topological four-fold symmetry. We have calculated their energies and discussed possible reasons for their dependence on a fullerene size and shape.
10.18149/MPM.4722021_13
carbon
embedding
energy
fullerene
fusion reaction
graph representation
growth
nanotube
periodic system
single and double bonds
topological symmetry
https://mpm.spbstu.ru/article/2021.81.13/
13-Alexander-I_-Melker%2C-Maria-A_-Krupina%2C-Aleksandra-N_-Matvienko.pdf
RAR
RUS
344-358
Bochagina
Peter the Great St. Petersburg Polytechnic University
St.Petersburg, Russia
Klinkov
Peter the Great St. Petersburg Polytechnic University
St.Petersburg, Russia
Markov
Peter the Great St. Petersburg Polytechnic University
St.Petersburg, Russia
Polyakova
Peter the Great St. Petersburg Polytechnic University
St.Petersburg, Russia
Sokolov
Peter the Great St. Petersburg Polytechnic University
St.Petersburg, Russia
The nature of dc conductivity and structural features of glasses of the Ag – As – Se system as materials for photonics and integral optics
The physical and chemical properties (density, microhardness, thermal effects, elastic modulus, dc conductivity, and the transfer number of silver ions) of glasses of the
As – Se – Ag system along the AsSe – Ag and AsSe1.5 – Ag sections were investigated. The transfer numbers of Ag+ ions were determined by a direct method; from their changes, it was found that the glasses of the investigated sections have mixed ion-electronic conductivity. The threshold concentration of silver at which the ionic component of the conductivity becomes dominant over the electron was determined. The volume fraction of the fluctuation free volume was calculated using elastic modulus, microhardness, and glass-transition temperatures values. It was shown that Ag+ ions do not experience serious steric hindrances during the process of migration.
10.18149/MPM.4722021_14
chalcogenide glass
dc conductivity
ionic conductivity
femtosecond laser
glass microhardness
transfer number
https://mpm.spbstu.ru/article/2021.81.14/
14-E_V_-Bochagina%2C-V_A_-Klinkov%2C-V_A_-Markov%2C-V_V_-Polyakova%2C-I_A_-Sokolov.pdf
RAR
RUS
359-385
Treschev
Tula State University
Tula, Russian Federation
Zhurin
Tula State University
Tula, Russian Federation
Deformation of a rectangular plate medium thickness from orthotropic differently resistant material
The construction of a physically nonlinear model of deformation of a rectangular orthotropic plate of average thickness loaded with a transverse uniform distributed load is considered. This model is limited by the scope of small deflections. In the formulation and solution, not only the orthotropy of the plate material was taken into account, but also the nonlinear differential resistance, which was described using the equations of state, constructed using the normalized stress space. The plate fastening is presented in two versions: hinged support and rigid fastening along the contour. An algorithm for solving this class of problems was developed and implemented. A practical solution was made using the MATLAB software package.
10.18149/MPM.4722021_15
rectangular plate
rigid clamping
hinged support
orthotropic material
nonlinear resistance to resistance
https://mpm.spbstu.ru/article/2021.81.15/
15-A_A_-Treschev%2C-E_A_-Zhurin.pdf
RAR
RUS
386-397
Mokhnatkin
A.F. Mozhaisky Military Space Engineering Academy
St.Petersburg, Russia
Zav'yalova
A.F. Mozhaisky Military Space Engineering Academy
St.Petersburg, Russia
Determination of the direction of the principal stresses in the elements of steel structures by the values of the coercive force
The change of values of circular diagram of the coercive force on the magnetization angle at the transition of loading scheme of I-beam made of steel 10 (P1.1.Z.AN) from symmetric bending to bending with constrained torsion at elastic deformations in the compression zone was studied. The necessity of constructing a circular diagram of the coercive force from the magnetization angle in the control zone to obtain information about the direction of the principal stresses when determining the stress-strain state of steel structure is substantiated.
10.18149/MPM.4722021_16
principal stress
elastic deformation
magnetization angle
coercive force
steel structure
https://mpm.spbstu.ru/article/2021.81.16/
16-D_P_-Mokhnatkin%2C-G_M_-Zav_yalova.pdf