https://www.elibrary.ru/title_about_new.asp?i
1605-8119
Materials physics and mechanics
54
1
2026
1-138
RAR
RUS
1-7
0000-0001-8286-3472
Ioffe Institute
Bagraev
N.T.
St.Petersburg, Russia
0000-0001-7577-1262
Ioffe Institute
Klyachkin
L.E.
St.Petersburg, Russia
0000-0002-4667-7004
Ioffe Institute
Malyarenko
A.M.
St.Petersburg, Russia
Ioffe Institute
Rul'
N.I.
St. Petersburg, Russia
Optical detection of the quantum Hall effect in silicon nanostructures
Electroluminescence spectra of a silicon nanostructure with edge channels covered by chains of dipole centers with negative correlation energy are demonstrated. The presence of such chains provides conditions for nondissipative transport of single charge carriers at high temperatures up to room temperature. Due to the suppression of the electron-electron interactions, the macroscopic quantum phenomena such as Shubnikov–de Haas oscillations and the quantum staircase of Hall resistance are consistent with the positions of the spectral peaks of the detected electroluminescence. The obtained results are considered in the framework of Faraday electromagnetic induction, which indicates that Landau quantization leads to the emergence of induced irradiation similar to Josephson and Andreev generation. Moreover, the detected maxima in the spectral characteristics correspond to odd fractional values of the resistance quantum staircases, while the dips in the electroluminescence spectra are observed at even fractional values of the resistance quantum ladder, which is due to the increased formation of composite bosons and fermions, respectively.
10.18149/MPM.5412026_1
silicon nanostructure
edge channels
negative-U dipole centers
quantum Hall effect
electroluminescence
electromagnetic induction
https://mpm.spbstu.ru/article/2026.112.1/
1_bagraev_et_al.pdf
RAR
RUS
8-16
0000-0001-8286-3472
Ioffe Institute
Bagraev
N.T.
St.Petersburg, Russia
Ioffe Institute
Dovator
N.A.
St. Petersburg, Russia
0000-0001-7577-1262
Ioffe Institute
Klyachkin
L.E.
St.Petersburg, Russia
0000-0002-4667-7004
Ioffe Institute
Malyarenko
A.M.
St.Petersburg, Russia
Meißner-Ochsenfeld effect in semiconductor nanostructures with negative-U shells
The Meißner-Ochsenfeld effect is demonstrated for the first time at room temperature. The diamagnetic response of a silicon nanostructure with edge channels covered by chains of negative-U dipole boron centers is studied when put in (removed from) an external magnetic field. Measurements of the diamagnetic response were carried out by recording the values of magnetization and generation currents. There is good agreement between the results of measurements of the generated internal magnetic field obtained using a ferroprobe and recording the EMF induced by the occurrence of generation currents in an external magnetic field, which determines the conditions of the mechanism of the nondissipative transport in the edge channels at room temperature, which is caused by their interactions with single carriers through negative-U dipole boron centers. The interrelation of the magnetization hysteresis and the magnitude of the EMF induced by the occurrence of generation currents indicates the possibilities of the electrical registration of the Meißner–Ochsenfeld effect in nanostructures manufactured within the framework of the Hall geometry.
10.18149/MPM.5412025_2
silicon nanostructure
edge channels
negative-U dipole centers
electromagnetic induction
Meißner–Ochsenfeld effect
https://mpm.spbstu.ru/article/2026.112.2/
2_bagraev_et_al.pdf
RAR
RUS
17-23
ITMO University
Panov
Dmitrii
St.Petersburg, Russia
ITMO University
Balabanov
N.A.
St. Petersburg, Russia
ITMO University
Sergeev
M.M.
St. Petersburg, Russia
ITMO University
Spiridonov
Vladislav
St.Petersburg, Russia
ITMO University
Bauman
Dmitrii
St.Petersburg, Russia
F-1445-2014
7202768874
0000-0003-3738-408X
ITMO University
Romanov
Alexey
alexey.romanov@niuitmo.ru
St.Petersburg, Russia
Study of optical resistance of a bulk β-Ga2O3 crystal
The optical resistance and geometric parameters of the damaged region under the action of laser radiation on bulk β-Ga2O3 crystal were studied and calculated depending on the power and frequency of laser irradiation. The sample of the crystal for the study was grown by the Czochralski method and prepared by method of cleaving along the (100) plane. The optical resistance was calculated by the Liu method using the laser irradiation and ablation parameters. The experiment determined the threshold for laser damage under pulses of 1030 nm wavelength and 224 fs duration; with a beam spot size of 9.6 μm. The threshold energy density varied from 25.99 to 16.29 J/cm² with pulse numbers varying from 1 to 20,000. The threshold power density of incident radiation ranged from 11.6 to 7.3 GW/cm2.
10.18149/MPM.5412026_3
gallium oxide
laser
optical resistance
Liu’s method
laser ablation
laser radiation
https://mpm.spbstu.ru/article/2026.112.3/
3_spiridonov_va_et_al.pdf
RAR
RUS
24-33
0000-0003-1635-5191
Krishna University Dr. MRAR College of PG Studies
Rao
P.R.
Nuzvid, India
0000-0002-8584-5752
Velagapudi Ramakrishna Siddhartha School of Engineering, Siddhartha Academy of Higher Education (SAHE) Deemed to be University
Naresh
Padamati
Vijayawada, India
Krishna University Dr. MRAR College of PG Studies
Rao
Narasimha N.
Nuzvid, India
Krishna University Dr. MRAR College of PG Studies
Swamy
Bhogi Jai Rama Satyanarayana N.
Nuzvid, India
0000-0001-6036-7929
Sir C. R. Reddy College of Engineering
Babu
A. Chitti
Eluru, India
Rajiv Gandhi University of Knowledge Technologies (AP-IIIT)
Babu
N.Ch. Ramesh
Nuzvid, India
Comprehensive study on PbO–MO (M=Mg, Zn, Cd)–As2O3:Tm2O3 glasses physical and optical properties
Three modifier oxides, MgO, ZnO, and CdO, were mixed with 1.0 mol % of Thulium-doped lead arsenate glasses and were synthesized by the usage of melt-quenching technique. XRD patterns clearly show the evidence that samples are amorphous and had been supported with the aid of using the lack of distinct peaks. Various functional physical parameters such as molar volume, oxygen packing density (OPD), Tm3+ ion concentration, mean Tm3+ ion separation, polaron radius are evaluated by using experimentally measured densities and refractive indices. The optical absorption spectra of PbO–MO (M = Mg, Zn, Cd)–As2O3:Tm2O3 glass system have been studied. Through the application of least square fitting analysis, the J-O phenomenological parameters (Ω2, Ω4, Ω6) for the three glass systems have been calculated.
10.18149/MPM.5412026_4
optical absorption
XRD
As2O3 glasses
JO parameters
rare earth doped glasses
https://mpm.spbstu.ru/article/2026.112.4/
4_rao_n_et_al.pdf
RAR
RUS
34-41
0000-0003-0727-6352
Institute of Problems of Mechanical Engineering RAS
Gutkin
M. Yu.
St.Petersburg, Russia
7003559440
0000-0003-2192-0386
Institute for Problems of Mechanical Engineering RAS
Skiba
Nikolai
nikolay.skiba@gmail.com
St. Petersburg, Russia
Emission of lattice dislocations from triple junctions of grain boundaries with liquid-like inclusions near pores in high-temperature ceramics
Theoretical model is suggested which describes the micromechanism of lattice dislocations emission from triple junctions of amorphous intercrystalline layers with pores and liquid-like inclusions in high-temperature ceramics. Within the model, the plastic deformation in ceramics under elevated temperatures is realized through the emission of lattice dislocations from triple junctions of grain boundaries and the subsequent glide of the emitted dislocations in the grain interior. In the exemplary case of high-temperature α-Al2O3 ceramics, a comparative analysis of the critical stresses for the emission of the lattice dislocations, and for their glide along the prismatic and basal slip planes in the grain interior depending on the deformation temperature was carried out in a wide temperature range from 300 to 1500 K. It is shown that the critical stress for the emission of the lattice dislocations decreases with both an increase in the length of the liquid-like inclusion and the deformation temperature, and increases with increasing the pore size.
10.18149/MPM.5412026_5
high-temperature ceramics
pores
lattice dislocations
amorphous intercrystalline layers
deformation temperature liquid-liked inclusions
https://mpm.spbstu.ru/article/2026.112.5/
5_gutkin_myu_skiba_nv.pdf
RAR
RUS
42-56
Institute for Problems of Mechanical Engineering RAS
Belyaev
F.S.
St. Petersburg, Russia
St. Petersburg State University
Volkov
A.E.
St. Petersburg, Russia
St. Petersburg State University
Evard
M.E.
St. Petersburg, Russia
St. Petersburg State University
Starodubova
St. Petersburg, Russia
The influence of microplastic deformation on the performance of a shape memory alloy vibration protection system: a modeling study
Shape memory alloys are promising for vibration protection systems but their long-term performance is challenged by functional fatigue due to microplastic deformation. A previously developed microstructural model that explicitly accounts for the evolution of microplastic deformation is utilized in the research to investigate the influence of this phenomenon. A one-dimensional oscillatory system with a payload isolated by two TiNi alloy springs is investigated. Numerical simulations compare the device's response in austenitic and martensitic states, with and without microplasticity, under harmonic excitation. The results confirm that microplastic deformation significantly alters the dynamic characteristics of the system, highlighting the necessity of its inclusion for accurate performance prediction. Furthermore, the analysis demonstrates the superior performance of the shape memory alloy system compared to linear elastic counterparts, showing its inherent ability to mitigate resonance across a frequency range.
10.18149/MPM.5412026_6
shape memory alloys
vibration protection
microplastic deformation
microstructural modeling
https://mpm.spbstu.ru/article/2026.112.6/
6_belyaev_fs_et_al.pdf
RAR
RUS
57-72
0000-0002-3832-310X
University of Anbar
Al-Moayed
O.M.
Ramadi, Iraq
0000-0003-2562-4509
University Tun Hussein Onn Malaysia
Ismail
A.E.
Batu Pahat, Malaysia
0000-0002-8446-8414
Al-Mustaqbal University
Kareem
A.K.
Babil, Hillah, Iraq
0000-0002-7710-0750
University Tun Hussein Onn Malaysia
Jamian
S.
Batu Pahat, Malaysia
Multiple surface crack interaction of non-coplanar cracks
Hollow cylinders represent one of the important elements in the industry. It is widely recognized that fracture characterizes the predominant mode of failure in cylindrical structures, which is precipitated by inherent imperfections or flaws. Over a period, these imperfections (cracks) may propagate and culminate in catastrophic failure, thereby presenting considerable hazards to both the surrounding ecosystem and human safety. Cracks can be single or multiple, and when they are in the multiple form, they can interact to increase pressures that are higher than what the material can withstand. Thus, this paper examines the influence of the interaction between double parallel non-coplanar cracks located on the external surface of a thick hollow cylinder subjected to remote tension and bending loading. Two sorts of separation distances were examined in this study, horizontal (s) and angular (α). The obtained stress intensity factor via finite element analysis was used to quantify the interaction factor along the crack front. The obtained results exhibited that both amplification and shielding interaction impacts could be observed along the crack front for a non-coplanar crack configuration. Additionally, both cracks exhibited the same interaction influence, but in opposite directions. The angular separation distance exhibited a significant influence on the interaction factor, this impact was strongly affected by the shape of the crack.
10.18149/MPM.5412026_7
surface cracks
thick cylinder
semi-elliptical crack
crack interaction
non-coplanar cracks
https://mpm.spbstu.ru/article/2026.112.7/
7_al-moayed_et_al.pdf
RAR
RUS
73-84
Sir M Visvesvaraya Institute of Technology
Rudresha
C.
Bangalore, Karnataka, India
CMR Institute of Technology
Balaji
C.
Bangalore, Karnataka, India
SJB Institute of Technology
Vidya Shree
V.
Bangalore, Karnataka, India
Sreenidhi University
Maruthamanikandan
S.
Hyderabad, Telangana, India
Linear stability analysis of electroconvection in a polarized dielectric porous layer with couple stresses under a sinusoidally time-varying electric potential
The linear stability of electroconvection in a horizontally oriented, thermally unstable dielectric fluid layer saturated with a Darcy porous medium and influenced by couple-stress effects are investigated. The system is subjected to a sinusoidally time-varying electric potential applied at the boundaries. The novelty of this work lies in the combined effects of couple stresses, electric field modulation, and Darcy-porous medium, an area not extensively explored in the existing literature. Using the Boussinesq approximation and a regular perturbation technique, we deal with the governing eigenvalue problem and analyze the critical conditions for the onset of convection. The analysis reveals that electric field modulation can exert either a stabilizing or destabilizing influence depending on the modulation frequency and material parameters. At low frequencies, the destabilizing role of the electric Rayleigh number becomes more pronounced, while couple stress effects contribute to system’s stabilization. Additionally, the Vadasz number significantly modifies the stability behavior, enhancing the effects of modulation at high frequencies. Our findings highlight the potential of electric field modulation as a viable mechanism for controlling therma l instability in particle-laden dielectric fluids confined within porous structures. The results provide new insights into electrohydrodynamic flow control in engineering systems involving smart fluids and porous media.
10.18149/MPM.5412026_8
couple stresses
dielectric fluid
electric field modulation
porous media
linear stability
electroconvection
https://mpm.spbstu.ru/article/2026.112.8/
8_rudresha_et_al.pdf
RAR
RUS
85-100
National Institute of Technology Kurukshetra
Yadav
A.
Kurukshetra, India
National Institute of Technology Kurukshetra
Jain
A.
Kurukshetra, India
National Institute of Technology Kurukshetra
Verma
R.
Kurukshetra, India
Influence of rotational speed on performance metrics in friction stir lap welding of aluminium 6061 and stainless steel 304-CFD approach
The joining of dissimilar materials such as aluminium and steel is of growing importance in modern manufacturing, owing to the demand for lightweight structures with superior mechanical performance. This study investigates the influence of rotational speed on key thermo-mechanical performance measures during dissimilar friction stir lap welding of aluminium alloy-6061 and stainless steel-304. Using finite volume method, numerical simulations were performed to quantify maximum weld interface temperature, maximum weld interface velocity, minimum weld interface viscosity, and tool-workpiece interface torque over a rotational speed range of 200–2200 rpm. Results reveal that maximum weld interface temperature rise steeply up to about 1000 rpm and then plateau due to thermal equilibrium. maximum weld interface velocity increases almost linearly with rotational speed, indicating improved interfacial shear and material mixing. In contrast, minimum weld interface viscosity and tool-workpiece interface torque decrease markedly as rotational speed increases, reflecting enhanced thermal softening and reduced resistance to tool motion. Intermediate rotational speed values (≈ 600–1200 rpm) provide an optimal balance of heat generation, material plasticization and torque, minimising the risk of excessive intermetallic compound growth or welding defects. The findings establish a physics-based framework for selecting process parameters that enhance joint integrity and efficiency in dissimilar friction stir lap welding of AA6061-SS304.
10.18149/MPM.5412026_9
friction stir weld
computational fluid-dynamics
finite-volume approach
ANSYS
fluent
https://mpm.spbstu.ru/article/2026.112.9/
9_yadav_a_et_al.pdf
RAR
RUS
101-117
Quaid-e-Awam University of Engineering, Science and Technology
Zulfiqar
M.
Nawabshah, Sindh, Pakistan
Quaid-e-Awam University of Engineering, Science and Technology
Jamali
A.S.
Nawabshah, Sindh, Pakistan
Indus University
Hussain
S.
Karachi, Pakistan
Tool wear and surface roughness analysis in hard turning of AISI 4340 steel with coated carbide inserts
The performance of CVD-coated carbide inserts (TiCN/Al2O3) in hard turning AISI 4340 steel at cutting speeds of 60, 95, 180, and 250 m/min, under both dry and wet conditions are investigated. The goals were to evaluate tool wear, surface roughness, and wear mechanisms over different machining conditions. Surface roughness Ra value was noticed, and it dropped to Ra = 0.30 μm at 180 m/min but increased at 250 m/min due to vibration, edge instability, and wear. Flank wear rose with cutting speed: 186 μm at 60 m/min, 265 μm at 180 m/min, 542 μm at 250 m/min (dry), and 692 μm (wet), exceeding ISO tool life (VB = 300 μm) due to edge breakage, flaking, and adhesion. The examination of the tool surface by SEM and EDS revealed abrasion and slight coating delamination at low speeds, adhesion and oxidation at intermediate speeds, and catastrophic tool failure at high speeds.
10.18149/MPM.5412026_10
AISI 4340 steel
CVD coated insert
hard turning
surface roughness
https://mpm.spbstu.ru/article/2026.112.10/
10_m_zulfiqar_et_al.pdf
RAR
RUS
118-129
Peter the Great St. Petersburg Polytechnic University
Fedorenko
R.V.
St. Petersburg, Russia
Peter the Great St. Petersburg Polytechnic University
Lukin
A.V.
St.Petersburg, Russia
Parameter identification of the Norton-Bailey creep model using isochronous curves
Structural integrity assessment of metal components in advanced reactor systems operating at elevated temperatures requires calculations that account for the sequence and duration of loading throughout their service life. Numerical simulation of such processes is performed using nonlinear inelastic material models, whose parameters are determined based on experimental data. The development and verification of an automated numerical algorithm for identifying the parameters of the Norton-Bailey creep law are considered. The algorithm utilizes initial data in the form of a set of material isochronous curves at a specific temperature. It implements an optimization procedure aimed at minimizing the discrepancy between the normative and the computed isochronous curves. The generation of the computed isochronous curves is performed using the Abaqus software package. It is demonstrated that the developed algorithm enables the highly accurate identification of the constants for the Norton-Bailey law.
10.18149/MPM.5412026_11
creep
parameter identification
isochronous curves
optimization
closed nuclear fuel cycle
https://mpm.spbstu.ru/article/2026.112.11/
11_fedorenko_lukin.pdf
RAR
RUS
130-138
Universidad Pontificia Bolivariana
Guzman-Lopez
R.E.
Bucaramanga, Colombia
Universidad Pontificia Bolivariana
Gomez Suarez
S.
Bucaramanga, Colombia
Universidad CEU San Pablo
Gonzalez-Lezcano
R.A.
Madrid, Spain
The elastic properties of natural fibre reinforced composite materials using homogenisation modeling
The numerical simulation of composite materials brings in a challenge in the resolution of problems with a high nonlinearity of both, material, and geometry (geometrically complex structures), with different size scales. Some common examples such as additive manufacturing 3D, metal alloys, porous media, polycrystalline materials and composites, a significant computing challenge is shown where all length scales are resolved by a single finite element model. This would require many elements, and computing the solution would be unfeasible, even using modern and near-future computing resources. The standard way to solve this situation of scale in finite element analysis is numerical homogenization technique. Material properties for a composite material are average, instead of simulating the full microstructure. With homogenized material data, it only required a macroscopic simulation using significantly less computational sources. The mechanical behavior of composites materials reinforced with natural fibers, is studied by means of a short fiber composite numerical model. The influence that the spatial distribution and the volumetric fraction of the cylindrical fibers have on the effective elastic properties of the numerical model was established (Young´s modulus E, Shear modulus G, Poisson´s ratio) - curves are presented corresponding to tension test applied on fique fibers and polylactic acid-biopolymer.
10.18149/MPM.5412026_12
representative volume element
multiparticle cell
fiber-reinforced composites
composite materials
natural fibre composites
https://mpm.spbstu.ru/article/2026.112.12/
12_gonzalez-lezcano_et_al.pdf