Search results for: S. V. Panin

Items from 1 to 20 out of 65 results

article

Effect of Nanoscale Mesoscopic Structural States Associated with Lattice Curvature on the Mechanical Behavior of Fe-Cr-Mn Austenitic Steel

V. E. Panin, N. S. Surikova, S. V. Panin, A. R. Shugurov, more

Physical Mesomechanics > 2019 > 22 > 5 > 382-391

The paper explores the effect of high-temperature cross rolling followed by cold rolling on the internal structure of metastable Fe-Cr-Mn austenitic stainless steel, formation of nonequilibrium martensite ε and α′ phases in it, dynamic rotations on fracture surfaces, fatigue life under alternating bending, and wear resistance. Scratch testing revealed a strong increase in the damping effect in the...

article

Applying Digital Image Correlation Technique for Studying the Growth of a Fatigue Crack in VT23 Titanium Alloy Welded Joints

A. V. Eremin, A. S. Smirnova, S. V. Panin, Yu. I. Pochivalov

Russian Journal of Nondestructive Testing > 2019 > 55 > 5 > 384-392

We present results of applying a combined approach to studying fatigue fracture processes in VT23 titanium alloy with a laser-welded joint. The approach involves fractographic examination using scanning electron microscopy and analysis of strain fields at the sample surface (using digital image correlation technique). Samples with permanent connections are presented in two forms: in the initial state...

article

Structure, as well as the Tribological and Mechanical Properties, of Extrudable Polymer-Polymeriс UHMWPE Composites for 3D Printing

S. V. Panin, D. G. Buslovich, L. A. Kornienko, V. O. Alexenko, more

Journal of Friction and Wear > 2019 > 40 > 2 > 107-115

In order to develop dispensable materials for additive manufacturing technologies, the structural and functional analysis of antifrictional polymer-polymer blends based on ultrahigh-molecular weight polyethylene (UHMWPE) are performed. The problem of the optimal selection of polymer plasticizers from the commercially available thermoplastic is solved in order to improve the extrudability of UHMWPE...

article

Receiving the Recipe of the Compositions Based on UHMWPE with the Assigned Properties

S. V. Panin, N. Yu. Grishaeva, P. A. Lyukshin, B. A. Lyukshin, more

Inorganic Materials: Applied Research > 2019 > 10 > 2 > 299-304

In the manufacture of products instead of unfilled polymers, such as ultra-high-molecular-weight polyethylene (UHMWPE), it is more effective to use composite systems with reinforcing inclusions. The paper discusses the possibility of creating a composition with the given physical and mechanical properties. An approach to the determination of control parameters (phase composition, phase properties)...

article

Stress-Strain State in a Buckled Thermal Barrier Coating on an Elastic Substrate

P. A. Lyukshin, B. A. Lyukshin, N. Yu. Matolygina, S. V. Panin

Physical Mesomechanics > 2018 > 21 > 6 > 498-507

The paper analyzes the stress-strain state of a thermal barrier coating buckled on an elastic substrate under thermal shock. For the analysis, the stability loss of an orthotropic plate on an elastic substrate (Winkler foundation) is modeled using the Euler method on the assumption that compressive stresses arise in the plate as it expands on heating while the substrate remains cold and dimensionally...

article

A Unified Approach to Determining the Effective Physicomechanical Characteristics of Filled Polymer Composites Based on Variational Principles

S. A. Bochkareva, N. Yu. Grishaeva, B. A. Lyukshin, P. A. Lyukshin, more

Mechanics of Composite Materials > 2019 > 54 > 6 > 775-788

An approach to solving the known problem on determination of the effective physical and mechanical properties of dispersedly filled compositions is presented. The solution is based on the formulation and numerical implementation of boundary-value problems based on the fundamental equations of the theories of elasticity, thermal conductivity, electrostatics, and electrical conductivity. The general...

article

Structural Scale Levels of Plastic Deformation and Fracture of High-Strength Titanium Alloy Welds

V. E. Panin, S. V. Panin, Yu. I. Pochivalov, A. S. Smirnova, more

Physical Mesomechanics > 2018 > 21 > 5 > 464-474

Structural scale levels of plastic deformation and fracture of welded joints have been studied for two high-strength titanium alloys with a low (VT18U alloy) and a high (VT23 alloy) content of the bcc ß phase. Ultrasonic forging and its combination with high-current pulsed electron beam treatment were used to activate nanoscale structural levels of deformation and fracture in welds in order to increase...

article

Efficiency of Bilateral Filter Application in Problems of Optical Flow Calculation

V. V. Titkov, S. V. Panin, P. S. Lyubutin, V. O. Chemezov

Optoelectronics, Instrumentation and Data Processing > 2017 > 53 > 6 > 583-590

It is proposed to use weight coefficients of the bilateral filter to calculate the measure of similarity of image regions in optical flow calculation algorithms. The efficiency of using this measure is studied by an example of a three-dimensional recursive search algorithm. Weight coefficients are used for calculating the optical flow with subpixel accuracy by the Lucas–Kanade algorithm. A possibility...

article

Applying an Ultrasonic Lamb Wave Based Rechnique to Testing the Condition of V96ts3T12 Aluminum Alloy

M. V. Burkov, A. V. Eremin, P. S. Lyubutin, A. V. Byakov, more

Russian Journal of Nondestructive Testing > 2017 > 53 > 12 > 817-829

Possibilities offered by an ultrasonic inspection technique that is based on using Lamb waves for monitoring the state of metal materials under static and cyclic loading have been studied. Dogbone V96ts3T12-aluminum-alloy specimens of the following two types have been used for research: initial material and a sample with a weld at the working zone center. The digital-image correlation method has been...

article

Fracture investigation of V-notch made of tungsten-copper functionally graded materials

H. Mohammadi, H. Salavati, Y. Alizadeh, F. Berto, more

Physical Mesomechanics > 2017 > 20 > 4 > 457-464

The fracture of V-notches with end holes made of tungsten-copper functionally graded material under mode I has been studied in this paper. The averaged strain energy density over a well-defined control volume was employed to predict the fracture loads. A numerical approach was used to determine the outer boundary of the control volume. Mechanical properties such as elasticity modulus, Poisson’s ratio,...

article

The role of notch tip shape and radius on deformation mechanisms of 12Cr1MoV steel under impact loading. Part 2. Influence of strain localization on fracture and numeric simulations

S. V. Panin, P. O. Maruschak, I. V. Vlasov, D. D. Moiseenko, more

Fatigue & Fracture of Engineering Materials & Structures > 40 > 11 > 1838 - 1853

The fracture energy of 12Cr1MoV steel specimen with V‐shaped, U‐shaped and I‐shaped notches under impact loading was measured and analysed. The results were described using three common approaches to ductile‐brittle fracture: force‐based, energy‐based and strain‐based. Within the stage‐wise approach of physical mesomechanics of materials, the rate of increase/decrease of load at the stage of initiation...

article

Effects of plastic distortion in the lattice curvature zone of a crack tip

V. E. Panin, D. D. Moiseenko, P. V. Maksimov, S. V. Panin

Physical Mesomechanics > 2017 > 20 > 3 > 280-290

The paper proposes a discrete-continual method of excitable cellular automata for simulating the stress-strain state at crack tips and in notches with account of lattice curvature and plastic distortion through ion motion from lattice sites to interstices. The proposed nonlinear method allows one to determine the crack type and the character of fracture, to predict the possibility of dynamic rotations...

article

Detecting acoustic-emission signals with fiber-optic interference transducers

O. V. Bashkov, R. V. Romashko, V. I. Zaikov, S. V. Panin, more

Russian Journal of Nondestructive Testing > 2017 > 53 > 6 > 415-421

Results of the analysis of acoustic-emission signals generated due to ultrasonic waves propagating in a polymer composite material and registered with piezoelectric and fiber-optic sensors are presented. The fiber-optic sensors were arranged into an adaptive interferometer based on using a dynamic hologram formed in a photorefractive crystal. Reducing the setpoint fading has made it possible to improve...

article

Algorithm of fatigue crack detection and determination of its tip position in optical images

S. V. Panin, V. O. Chemezov, P. S. Lyubutin, V. V. Titkov

Optoelectronics, Instrumentation and Data Processing > 2017 > 53 > 3 > 237-244

An algorithm of fatigue crack detection in optical images taken in fatigue tests of materials is proposed and tested. The algorithm is designed for automation of measurements of the crack propagation parameter and tracing the crack tip position in the course of cyclic loading for the purpose of shifting the optical system with respect to the examined sample surface to the “region of interest.” It...

article

Effect of the mesh size of the vector displacement field on the strain estimate in the digital image correlation method

S. V. Panin, V. V. Titkov, P. S. Lyubutin

Journal of Applied Mechanics and Technical Physics > 2017 > 58 > 3 > 425-434

The influence of the mesh size of the displacement vector field on the strain estimate in the digital image correlation method is considered. The reasons for the emergence and the magnitude of the strain estimate error in processing optical images of material surfaces with different textures are analyzed. The dependence of the mesh size for strain estimation on the magnitude of displacements and also...

article

The physical basics of structure formation in electroexplosive coatings

V. E. Panin, V. E. Gromov, D. A. Romanov, E. A. Budovskikh, more

Doklady Physics > 2017 > 62 > 2 > 67-70

It is shown that, under an electroexplosive spraying of coatings of various systems, the dynamic rotation of the particles deposited is the basis for forming a vortex hierarchically organized structure in both the coating and upper layers of the substrate, including their interface. This causes dispersion of all the structural elements of the cover, their mutual penetration into each other, and the...

article

Evaluation of dynamic fracture toughness parameters of locomotive axle steel by instrumented Charpy impact test

A. P. Sorochak, P. O. Maruschak, O. P. Yasniy, T. Vuherer, more

Fatigue & Fracture of Engineering Materials & Structures > 40 > 4 > 512 - 522

The analysis of the energy of fracture of specimens from steel OSL, which is widely used for the manufacture of railway axles under shock loading, is performed. The nature and quantitative parameters of the typical stages of the processes of plastic and brittle fracture, depending on the test temperature and stiffness of the stress state at the tip of the crack‐like defect, are established. It is...

article

The role of notch tip shape and radius on deformation mechanisms of 12Cr1MoV steel under impact loading. Part 1. Energy parameters of fracture

S. V. Panin, P. O. Maruschak, I. V. Vlasov, D. D. Moiseenko, more

Fatigue & Fracture of Engineering Materials & Structures > 40 > 4 > 586 - 596

Impact loading curves and fracture energy of the notched 12Cr1MoV ductile steel specimens are analysed. The qualitative description and quantitative parameters are obtained for major stages of ductile and brittle fracture depending on the shape of the notch and the stress stiffness ahead. It was shown that a zone with enhanced plasticity forms in the vicinity of V‐, U‐ and I‐shaped notches at 20 °C...

article

Multiscaling of lattice curvature on friction surfaces of metallic materials as a basis of their wear mechanism

V. E. Panin, V. G. Pinchuk, S. V. Korotkevich, S. V. Panin

Physical Mesomechanics > 2017 > 20 > 1 > 69-77

A comprehensive structural study has been performed to explore deformation and wear debris formation on friction surfaces of metallic materials. A hierarchy of structural scales of plastic deformation and failure during wear has been established. The nanoscale plays the major role in the hierarchical self-organization of multiscale debris formation processes. On this scale, bifurcational interstitial...

article

Effect of vacuum arc ion beam treatment on the structure and mechanical properties of 30CrMnSiNi2A steel

S. V. Panin, I. V. Vlasov, V. P. Sergeev, B. B. Ovechkin, more

Physical Mesomechanics > 2016 > 19 > 4 > 392-406

The paper reports on a study of the structure and mechanical properties of 30CrMnSiNi2A high-strength steel irradiated with a Zr+ ion beam. The effect of irradiation on the steel was assessed by optical, transmission, and scanning electron microscopy as well as by X-ray di ITraction analysis of its irradiated and non-irradiated specimens 1 mm thick under static and cyclic tension, showing an increase...

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Search results for: S. V. Panin

Effect of Nanoscale Mesoscopic Structural States Associated with Lattice Curvature on the Mechanical Behavior of Fe-Cr-Mn Austenitic Steel

Applying Digital Image Correlation Technique for Studying the Growth of a Fatigue Crack in VT23 Titanium Alloy Welded Joints

Structure, as well as the Tribological and Mechanical Properties, of Extrudable Polymer-Polymeriс UHMWPE Composites for 3D Printing

Receiving the Recipe of the Compositions Based on UHMWPE with the Assigned Properties

Stress-Strain State in a Buckled Thermal Barrier Coating on an Elastic Substrate

A Unified Approach to Determining the Effective Physicomechanical Characteristics of Filled Polymer Composites Based on Variational Principles

Structural Scale Levels of Plastic Deformation and Fracture of High-Strength Titanium Alloy Welds

Efficiency of Bilateral Filter Application in Problems of Optical Flow Calculation

Applying an Ultrasonic Lamb Wave Based Rechnique to Testing the Condition of V96ts3T12 Aluminum Alloy

Fracture investigation of V-notch made of tungsten-copper functionally graded materials

The role of notch tip shape and radius on deformation mechanisms of 12Cr1MoV steel under impact loading. Part 2. Influence of strain localization on fracture and numeric simulations

Effects of plastic distortion in the lattice curvature zone of a crack tip

Detecting acoustic-emission signals with fiber-optic interference transducers

Algorithm of fatigue crack detection and determination of its tip position in optical images

Effect of the mesh size of the vector displacement field on the strain estimate in the digital image correlation method

The physical basics of structure formation in electroexplosive coatings

Evaluation of dynamic fracture toughness parameters of locomotive axle steel by instrumented Charpy impact test

The role of notch tip shape and radius on deformation mechanisms of 12Cr1MoV steel under impact loading. Part 1. Energy parameters of fracture

Multiscaling of lattice curvature on friction surfaces of metallic materials as a basis of their wear mechanism

Effect of vacuum arc ion beam treatment on the structure and mechanical properties of 30CrMnSiNi2A steel

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