Search results for: P. S. Lyubutin

Items from 1 to 20 out of 20 results

article

Lamb Wave Ultrasonic Detection of Barely Visible Impact Damages of CFRP

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

Russian Journal of Nondestructive Testing > 2019 > 55 > 2 > 89-101

Results of applying a Lamb-wave-based ultrasonic technique to detect impact damages to a CFRP honeycomb panel are presented. The technique is based on analyzing changes in wave propagation due to defects and makes use of a network of piezoelectric transducers adhesively bonded to the panel surface. Preliminary experiments and tests have been carried out in which defect simulators (metal discs attached...

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

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

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...

article

Erratum to: Quantitative Analysis of a Network of Thermal-Fatigue Cracks on the Surface of a Material

P. O. Marushchak, I. V. Konovalenko, S. V. Panin, P. S. Lyubutin, more

Materials Science > 2015 > 51 > 1 > 148-148

article

Quantitative Analysis of a Network of Thermal-Fatigue Cracks on the Surface of a Material

P. O. Marushchak, I. V. Konovalenko, S. V. Panin, P. S. Lyubutin, more

Materials Science > 2015 > 50 > 6 > 805-816

According to the data of the automated analysis of images of the surfaces with thermal-fatigue cracks, we study the specific features of the deformation and fracture processes in 25Kh1М1F heat-resistant steel. We reveal and quantitatively describe the regularities and characteristic stages of its deformation with transformations of the block structure of cracking on the surface as a result of merging...

article

Selection of parameters of the three-dimensional recursive search algorithm in constructing displacement vector fields with the use of the hierarchical approach

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

Optoelectronics, Instrumentation and Data Processing > 2015 > 51 > 2 > 124-133

An approach to automatic determination of operation parameters of a hierarchical 3D recursive search (3DRS) algorithm is proposed and tested. A comparative study of the computational speed and noise immunity of the 3DRS algorithm used for constructing displacement vector fields, including the use of the Gaussian pyramids (hierarchical search), is performed. It is shown that application of the hierarchical...

article

Fatigue life enhancement by irradiation of 12Cr1MoV steel with a Zr⁺ ion beam. Mesoscale deformation and fracture

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

Physical Mesomechanics > 2015 > 18 > 3 > 261-272

The structure and properties of 12Cr1MoV steel irradiated with a zirconium ion beam were studied by optical microscopy, scanning electron microscopy, and micro- and nanoindentation. It is shown that the modification covers the entire cross-section of the irradiated specimens to a depth of 1 mm. The data on irradiation-induced structural changes are used to interpret the changes in mechanical properties...

article

Estimation of the Kinetics of Fatigue Fracture by the Automated Analysis of Deformation Patterns on the Surfaces of Specimens with Central Holes

P. O. Marushchak, I. V. Konovalenko, S. V. Panin, P. S. Lyubutin, more

Materials Science > 2014 > 50 > 3 > 388-396

We develop a method for the digital-optical analysis of defects in materials with simultaneous measuring of several diagnostic parameters and estimation of the degree of damage to the material in the vicinity of a stress concentrator by analyzing the displacements and distortions of the preliminarily made surface marks. By using the results of mathematical description of the field of displacements...

article

Application of integral-type deformation pickups for evaluating the fatigue damage of carbon composites

S. V. Panin, M. V. Burkov, P. S. Lyubutin, Yu. A. Altukhov, more

Russian Journal of Nondestructive Testing > 2014 > 50 > 5 > 288-298

Cyclic tests of specimens of a carbon-fiber-based composite material were performed and their operation time was evaluated using an integral-type deformation pickup (ITDP). The pickup includes a polished aluminum foil (sensitive element), which is pasted on the surface of a specimen and deformed together with it. Its images were recorded with an МЬС-9 microscope additionally equipped with a digital...

article

Incremental approach to determination of image fragment displacements during vector field construction

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

Optoelectronics, Instrumentation and Data Processing > 2014 > 50 > 2 > 139-147

An algorithm of constructing displacement vector fields, based on the incremental approach to estimating displacements of image fragments, is proposed. Application of this algorithm for processing model and experimental optical images is analyzed. Noise immunity of the incremental algorithm for determining displacements is compared with that of the combined algorithm developed by the authors. It is...

article

Smoothing of vector fields by using the Bezier surface for strain estimation by the method of digital image correlation

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

Optoelectronics, Instrumentation and Data Processing > 2014 > 50 > 1 > 61-67

The use of the Bezier surface as a smoothing filter for vector fields is studied. Advantages of the Bezier surface over the moving average filter are determined. The algorithm of adaptation of the filter aperture size is modified. The efficiency of adaptation of the aperture size in vector field processing in the problem of estimating the material strain by the method of digital image correlation...

article

Efficiency of vector field filtration algorithms in estimating material strain by the method of digital image correlation

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

Optoelectronics, Instrumentation and Data Processing > 2013 > 49 > 2 > 155-163

Various filtration methods are compared by an example of processing of model and experimental vector fields. A criterion for estimating the filtration efficiency is proposed. It is demonstrated that combined vector filters ensure more efficient filtration than other popular methods.

article

Application of the fractal dimension for estimating surface images obtained by various detectors

S. V. Panin, Yu. A. Altukhov, P. S. Lyubutin, A. V. Byakov, more

Optoelectronics, Instrumentation and Data Processing > 2013 > 49 > 1 > 34-40

The influence of various methods of obtaining surface images on the calculated value of their fractal dimension as a quantitative characteristic of the surface state is studied. It is demonstrated that images obtained both by a scanning electron microscope and by a photocamera are characterized by a noticeable noise level, which alters the behavior of the fractal dimension. Various methods of correction...

article

Effect of bilateral filtration on fractal estimation of optical images of loaded material surfaces

S. V. Panin, Yu. A. Altukhov, P. S. Lyubutin, A. V. Byakov, more

Optoelectronics, Instrumentation and Data Processing > 2013 > 49 > 3 > 234-242

The influence of adaptive bilateral filtration on the calculation of the fractal dimension of optical images is estimated. Filtration parameters are chosen on the basis of various criteria. The use of the maximum dispersion of the probability as the most effective parameter of estimating the image filtration quality is considered.

chapter

Increase of fatigue strength of 12Cr1МoV steel by surface nanostructuting with Zr⁺ ion beam

S. V. Panin, I. V. Vlasov, V. P. Sergeev, A. R. Sungatulin, more

2012 7th International Forum on Strategic Technology (IFOST) > 1 - 6

2012 7th International Forum on Strategic Technology (IFOST)

A cyclic tension and alternating bending tests of 12Cr1MoV steel specimens in as-supplied state and after surface nanostructuring by Zr⁺ ion beam have been carried out. Distinctions in formation of strain induced relief, as well as the cracking pattern of modified surface layer are illustrated by methods of optical microscopy and interferential profilometry. Changes to occur in subsurface layer are...

chapter

Multiscale technique for localized strain investigation of aluminum alloy and carbon fiber composite based on data of strain gauging, digital image correlation and acoustic emission

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

2012 7th International Forum on Strategic Technology (IFOST) > 1 - 5

2012 7th International Forum on Strategic Technology (IFOST)

A combined method to investigation of localized deformation processes in notched aluminum alloy as well as carbon fiber reinforced composite specimens is applied in order to reveal characteristic stages of strain and fracture. Stress concentrators have the shape of a circular hole and edge crack of various sizes. Carbon fiber reinforced composites (CFRC) with notches of different size were also tested...

article

Mesoscale measurement of strains by analyzing optical images of the surface of loaded solids

P. S. Lyubutin, S. V. Panin

Journal of Applied Mechanics and Technical Physics > 2006 > 47 > 6 > 905-910

An algorithm for estimating the strains in solids at the mesoscale level, which is based on constructing fields of displacement vectors and calculating strain components, is studied and tested. Verification of the method is performed by comparing the analytically calculated strain components with experimental data obtained on the basis of model images and images recorded by a TOMSC optical TV measurement...

Filter options

Publication date

Set your own date range

INFONA - science communication portal

Search results for: P. S. Lyubutin

Add recipient

Sending message cancelled

Are you sure you want to cancel sending this message?

Send message

Filter options

Publication date

Date range setting

Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.

Content availability

Publication type

Keywords

Data set

Journal

Reporting an error / abuse

Sending the report failed

Accessibility options