Sergey Panin - Academia.edu (original) (raw)
Papers by Sergey Panin
Materials
The aim of the study was to develop a design methodology for the UltraHigh Molecular Weight Polye... more The aim of the study was to develop a design methodology for the UltraHigh Molecular Weight Polyethylene (UHMWPE)-based composites used in friction units. To achieve this, stress–strain analysis was done using computer simulation of the triboloading processes. In addition, the effects of carbon fiber size used as reinforcing fillers on formation of the subsurface layer structures at the tribological contacts as well as composite wear resistance were evaluated. A structural analysis of the friction surfaces and the subsurface layers of UHMWPE as well as the UHMWPE-based composites loaded with the carbon fibers of various (nano-, micro-, millimeter) sizes in a wide range of tribological loading conditions was performed. It was shown that, under the “moderate” tribological loading conditions (60 N, 0.3 m/s), the carbon nanofibers (with a loading degree up to 0.5 wt.%) were the most efficient filler. The latter acted as a solid lubricant. As a result, wear resistance increased by 2.7 ti...
Key Engineering Materials, 2016
The paper is devoted to investigation of ultrasonic signal properties and their changes during cy... more The paper is devoted to investigation of ultrasonic signal properties and their changes during cyclic loading of CFRP sandwich panels with aluminum honeycomb core. In order to estimate the mechanical state of the composite structures the Lamb wave based technique is proposed. Acoustic signals are generated and sensed by piezoelectric transducers adhesively bonded on the specimen surface. Sensed signals are analyzed by computing the set of informative parameters which characterize ultrasonic signals evolution during cyclic tests. The paper represents the results allowing identification of three stages of fatigue damaging and failure for two specimens subjected to tensile-compressive loading.
Journal of Nanotechnology
The influence of modification by hydroxyapatite (HA) nano- and microparticles on tribotechnical p... more The influence of modification by hydroxyapatite (HA) nano- and microparticles on tribotechnical properties of ultrahigh-molecular-weight polyethylene (UHMWPE) was investigated to develop polymer implants for endoprosthesis. It was shown that modification of UHMWPE by hydroxyapatite nanoparticles within range of 0.1–0.5 wt.% results in increase of wear resistance at dry sliding by 3 times. On the other hand adding of 20 wt.% of micron size HA gives rise to the same effect. The effect of increasing wear resistance is not substantially changed at surface treatment of the nano- and microcomposites by N+ ion beams as compared with nonirradiated blends. Preliminary joint mechanical activation of UHMWPE powder and fillers results in more uniform distribution of nanofillers in the matrix and, as a result, formation of more ordered structure. Structure within bulk material and surface layers was studied by means of optical profilometry, scanning electron microscopy, infrared spectroscopy, an...
Materials, Feb 5, 2019
Regularities of steel structure degradation of the "Novopskov-Aksay-Mozdok" gas main pipelines (N... more Regularities of steel structure degradation of the "Novopskov-Aksay-Mozdok" gas main pipelines (Nevinnomysskaya CS) as well as the "Gorky-Center" pipelines (Gavrilovskaya CS) were studied. The revealed peculiarities of their degradation after long-term operation are suggested to be treated as a particular case of the damage accumulation classification (scheme) proposed by prof. H.M. Nykyforchyn. It is shown that the fracture surface consists of sections of ductile separation and localized zones of micro-spalling. The presence of the latter testifies to the hydrogen-induced embrittlement effect. However, the steels under investigation possess sufficiently high levels of the mechanical properties required for their further safe exploitation, both in terms of durability and cracking resistance.
Journal of Nanotechnology, 2012
The influence of modification by hydroxyapatite (HA) nano- and microparticles on tribotechnical p... more The influence of modification by hydroxyapatite (HA) nano- and microparticles on tribotechnical properties of ultrahigh-molecular-weight polyethylene (UHMWPE) was investigated to develop polymer implants for endoprosthesis. It was shown that modification of UHMWPE by hydroxyapatite nanoparticles within range of 0.1–0.5 wt.% results in increase of wear resistance at dry sliding by 3 times. On the other hand adding of 20 wt.% of micron size HA gives rise to the same effect. The effect of increasing wear resistance is not substantially changed at surface treatment of the nano- and microcomposites by N+ion beams as compared with nonirradiated blends. Preliminary joint mechanical activation of UHMWPE powder and fillers results in more uniform distribution of nanofillers in the matrix and, as a result, formation of more ordered structure. Structure within bulk material and surface layers was studied by means of optical profilometry, scanning electron microscopy, infrared spectroscopy, and...
Journal of Friction and Wear, 2010
The influence of nano and microfillers, including nanofibers and powder of Al 2 O 3 and aluminum ... more The influence of nano and microfillers, including nanofibers and powder of Al 2 O 3 and aluminum oxyhydrides AlO(OH) on the mechanical and tribological characteristics of ultrahigh molecular weight polyethylene (UHMWPE) is studied. It is found that modification of UHMWPE with nanofibers of Al 2 O 3 within 0.1-0.5 wt % ensures a considerable increase in its hardness and multifold increase in its wear resis tance. Modification with ultradisperse powders of Al 2 O 3 (200-500 nm) in the same amounts has an insignif icant effect on the polymer characteristics. Filling of UHMWPE with micron sized particles (3-50 μm) in amounts of 20 wt % results in increased wear resistance of the original polymer, comparable with the wear resistance at low nanofiber content. X ray diffraction analysis, IR spectroscopy, and electron microscopy are used to show that incorporation of Al 2 O 3 nanofibers into UHMWPE results in the formation of a fundamen tally different supermolecular structure in comparison with the use of microfillers.
Materials
Regularities of steel structure degradation of the “Novopskov-Aksay-Mozdok” gas main pipelines (N... more Regularities of steel structure degradation of the “Novopskov-Aksay-Mozdok” gas main pipelines (Nevinnomysskaya CS) as well as the “Gorky-Center” pipelines (Gavrilovskaya CS) were studied. The revealed peculiarities of their degradation after long-term operation are suggested to be treated as a particular case of the damage accumulation classification (scheme) proposed by prof. H.M. Nykyforchyn. It is shown that the fracture surface consists of sections of ductile separation and localized zones of micro-spalling. The presence of the latter testifies to the hydrogen-induced embrittlement effect. However, the steels under investigation possess sufficiently high levels of the mechanical properties required for their further safe exploitation, both in terms of durability and cracking resistance.
Steel in Translation
ABSTRACT The structural modification and change of wear resistance on friction with boundary lubr... more ABSTRACT The structural modification and change of wear resistance on friction with boundary lubrication is considered for 110Γ13 steel with and without impact ultrasound treatment. The deformational relief formed on the lateral surface of the samples in compression and in frictional loading is found to be the same. On that basis, the factors responsible for the change in wear resistance are discussed.
Russian Journal of Nondestructive Testing
Russian Journal of Nondestructive Testing
Russian Journal of Nondestructive Testing
ABSTRACT Cyclic tests of specimens of a carbon-fiber-based composite material were performed and ... more ABSTRACT 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 camera. To analyze the deformation relief using ITDPs, a complex of informative parameters was calculated and the character and typical stages of their changes were discussed and interpreted. It was proposed to use this data when developing built-in sensors for monitoring the state of parts of critical equipment.
Optoelectronics, Instrumentation and Data Processing
ABSTRACT An approach to automatic determination of operation parameters of a hierarchical 3D recu... more ABSTRACT 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 3DRS algorithm with operation parameters determined in this work can substantially increase its noise immunity and reduce the computational cost.
Journal of King Saud University - Engineering Sciences
IOP Conference Series: Materials Science and Engineering
ABSTRACT Various criteria for processing of aluminum foil ''smart sensors'... more ABSTRACT Various criteria for processing of aluminum foil ''smart sensors'' images for fatigue evaluation of carbon fiber reinforced polymer (CFRP) were analyzed. There are informative parameters used to assess image quality and surface relief and accordingly to characterize the fatigue damage state of CFRP. The sensitivity of all criteria to distortion influences, particularly, to Gaussian noise, blurring and JPEG compression was investigated. The main purpose of the research is related to the search of informative parameters for fatigue evaluation, which are the least sensitive to different distortions.
2012 7th International Forum on Strategic Technology (IFOST), 2012
ABSTRACT UHMWPE (Ultra High Molecular Weight Polyethylene) is widely used in the medical applicat... more ABSTRACT UHMWPE (Ultra High Molecular Weight Polyethylene) is widely used in the medical application and is a promising structural material for application in mining, chemical, mechanical engineering. Having very low friction coefficient it might be used even instead of metal friction parts but it calls for further increase of its physical mechanical properties. It is one of the very high resistant materials but it is difficult to bond with other substances. One of perspective ways to bond UHMW-PE with filler is its grafting. There is one more interesting approach, when graft UHMWPE is added to UHMW-PE in order to react both with latter and nanofiller. This might be achieved be adding different kind of fillers, in particular nanoscale ones. In this paper we attempted to increase the mixture ability of UHMWE-graft-SMA with Cu, CNF and Al2O3 for enhancing its wear resistance properties and study the changing of hardness after mixing. We employed UHMWPE powder and graft UHMWPE with anhydride and carboxyl functional groups realized by modification of the polymers in reacting gases (UHMWPE-g-SMA). It was assumed that grafting will provide adhesion between UHMWPE particles. UHMWPE-g-SMA and UHMWPE were mixed using a high speed homogenizer in dry form. The mixture was pure UHMWPE with 0, 3, 5, 10 and 20 wt% of UHMWPE-g-SMA. This material is denoted as UHMWPE-g 0, 3, 5, 10, 20 respectively. And then add 0.5% CNF (Carbon Nano Fiber), 0.5% Cu (nanosize) and 0.5% Al2O3 (nanosize) to their mixture. The wear resistance of UHMWPE + UHMWPE-g-SMA specimens is increased when UHMWPE-g-SMA is mixed with UHMWPE powder and nanofillers. Cu, CNF and Al2O3 nano filler were added to UHMWPE the wear intensity is rather different from UHMWPE in initial state (pure) and give rise to increase wear resistance. The results of the wear tests have shown that the highest wear resistances of each group of fillers are UHMWPE-g 3 with 0.5% Cu, U- MWPE-g 3 with 0.5% CNF and UHMWPE-g 10 with 0.5% Al2O3. However, in contrast with this result, wear resistances is increased when UHMWPE-g-SMA and nanofillers were added. In case of hardness property, hardness does not change effectively.
Journal of Friction and Wear, 2014
Optoelectronics, Instrumentation and Data Processing, 2013
ABSTRACT The influence of adaptive bilateral filtration on the calculation of the fractal dimensi... more ABSTRACT 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.
Materials
The aim of the study was to develop a design methodology for the UltraHigh Molecular Weight Polye... more The aim of the study was to develop a design methodology for the UltraHigh Molecular Weight Polyethylene (UHMWPE)-based composites used in friction units. To achieve this, stress–strain analysis was done using computer simulation of the triboloading processes. In addition, the effects of carbon fiber size used as reinforcing fillers on formation of the subsurface layer structures at the tribological contacts as well as composite wear resistance were evaluated. A structural analysis of the friction surfaces and the subsurface layers of UHMWPE as well as the UHMWPE-based composites loaded with the carbon fibers of various (nano-, micro-, millimeter) sizes in a wide range of tribological loading conditions was performed. It was shown that, under the “moderate” tribological loading conditions (60 N, 0.3 m/s), the carbon nanofibers (with a loading degree up to 0.5 wt.%) were the most efficient filler. The latter acted as a solid lubricant. As a result, wear resistance increased by 2.7 ti...
Key Engineering Materials, 2016
The paper is devoted to investigation of ultrasonic signal properties and their changes during cy... more The paper is devoted to investigation of ultrasonic signal properties and their changes during cyclic loading of CFRP sandwich panels with aluminum honeycomb core. In order to estimate the mechanical state of the composite structures the Lamb wave based technique is proposed. Acoustic signals are generated and sensed by piezoelectric transducers adhesively bonded on the specimen surface. Sensed signals are analyzed by computing the set of informative parameters which characterize ultrasonic signals evolution during cyclic tests. The paper represents the results allowing identification of three stages of fatigue damaging and failure for two specimens subjected to tensile-compressive loading.
Journal of Nanotechnology
The influence of modification by hydroxyapatite (HA) nano- and microparticles on tribotechnical p... more The influence of modification by hydroxyapatite (HA) nano- and microparticles on tribotechnical properties of ultrahigh-molecular-weight polyethylene (UHMWPE) was investigated to develop polymer implants for endoprosthesis. It was shown that modification of UHMWPE by hydroxyapatite nanoparticles within range of 0.1–0.5 wt.% results in increase of wear resistance at dry sliding by 3 times. On the other hand adding of 20 wt.% of micron size HA gives rise to the same effect. The effect of increasing wear resistance is not substantially changed at surface treatment of the nano- and microcomposites by N+ ion beams as compared with nonirradiated blends. Preliminary joint mechanical activation of UHMWPE powder and fillers results in more uniform distribution of nanofillers in the matrix and, as a result, formation of more ordered structure. Structure within bulk material and surface layers was studied by means of optical profilometry, scanning electron microscopy, infrared spectroscopy, an...
Materials, Feb 5, 2019
Regularities of steel structure degradation of the "Novopskov-Aksay-Mozdok" gas main pipelines (N... more Regularities of steel structure degradation of the "Novopskov-Aksay-Mozdok" gas main pipelines (Nevinnomysskaya CS) as well as the "Gorky-Center" pipelines (Gavrilovskaya CS) were studied. The revealed peculiarities of their degradation after long-term operation are suggested to be treated as a particular case of the damage accumulation classification (scheme) proposed by prof. H.M. Nykyforchyn. It is shown that the fracture surface consists of sections of ductile separation and localized zones of micro-spalling. The presence of the latter testifies to the hydrogen-induced embrittlement effect. However, the steels under investigation possess sufficiently high levels of the mechanical properties required for their further safe exploitation, both in terms of durability and cracking resistance.
Journal of Nanotechnology, 2012
The influence of modification by hydroxyapatite (HA) nano- and microparticles on tribotechnical p... more The influence of modification by hydroxyapatite (HA) nano- and microparticles on tribotechnical properties of ultrahigh-molecular-weight polyethylene (UHMWPE) was investigated to develop polymer implants for endoprosthesis. It was shown that modification of UHMWPE by hydroxyapatite nanoparticles within range of 0.1–0.5 wt.% results in increase of wear resistance at dry sliding by 3 times. On the other hand adding of 20 wt.% of micron size HA gives rise to the same effect. The effect of increasing wear resistance is not substantially changed at surface treatment of the nano- and microcomposites by N+ion beams as compared with nonirradiated blends. Preliminary joint mechanical activation of UHMWPE powder and fillers results in more uniform distribution of nanofillers in the matrix and, as a result, formation of more ordered structure. Structure within bulk material and surface layers was studied by means of optical profilometry, scanning electron microscopy, infrared spectroscopy, and...
Journal of Friction and Wear, 2010
The influence of nano and microfillers, including nanofibers and powder of Al 2 O 3 and aluminum ... more The influence of nano and microfillers, including nanofibers and powder of Al 2 O 3 and aluminum oxyhydrides AlO(OH) on the mechanical and tribological characteristics of ultrahigh molecular weight polyethylene (UHMWPE) is studied. It is found that modification of UHMWPE with nanofibers of Al 2 O 3 within 0.1-0.5 wt % ensures a considerable increase in its hardness and multifold increase in its wear resis tance. Modification with ultradisperse powders of Al 2 O 3 (200-500 nm) in the same amounts has an insignif icant effect on the polymer characteristics. Filling of UHMWPE with micron sized particles (3-50 μm) in amounts of 20 wt % results in increased wear resistance of the original polymer, comparable with the wear resistance at low nanofiber content. X ray diffraction analysis, IR spectroscopy, and electron microscopy are used to show that incorporation of Al 2 O 3 nanofibers into UHMWPE results in the formation of a fundamen tally different supermolecular structure in comparison with the use of microfillers.
Materials
Regularities of steel structure degradation of the “Novopskov-Aksay-Mozdok” gas main pipelines (N... more Regularities of steel structure degradation of the “Novopskov-Aksay-Mozdok” gas main pipelines (Nevinnomysskaya CS) as well as the “Gorky-Center” pipelines (Gavrilovskaya CS) were studied. The revealed peculiarities of their degradation after long-term operation are suggested to be treated as a particular case of the damage accumulation classification (scheme) proposed by prof. H.M. Nykyforchyn. It is shown that the fracture surface consists of sections of ductile separation and localized zones of micro-spalling. The presence of the latter testifies to the hydrogen-induced embrittlement effect. However, the steels under investigation possess sufficiently high levels of the mechanical properties required for their further safe exploitation, both in terms of durability and cracking resistance.
Steel in Translation
ABSTRACT The structural modification and change of wear resistance on friction with boundary lubr... more ABSTRACT The structural modification and change of wear resistance on friction with boundary lubrication is considered for 110Γ13 steel with and without impact ultrasound treatment. The deformational relief formed on the lateral surface of the samples in compression and in frictional loading is found to be the same. On that basis, the factors responsible for the change in wear resistance are discussed.
Russian Journal of Nondestructive Testing
Russian Journal of Nondestructive Testing
Russian Journal of Nondestructive Testing
ABSTRACT Cyclic tests of specimens of a carbon-fiber-based composite material were performed and ... more ABSTRACT 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 camera. To analyze the deformation relief using ITDPs, a complex of informative parameters was calculated and the character and typical stages of their changes were discussed and interpreted. It was proposed to use this data when developing built-in sensors for monitoring the state of parts of critical equipment.
Optoelectronics, Instrumentation and Data Processing
ABSTRACT An approach to automatic determination of operation parameters of a hierarchical 3D recu... more ABSTRACT 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 3DRS algorithm with operation parameters determined in this work can substantially increase its noise immunity and reduce the computational cost.
Journal of King Saud University - Engineering Sciences
IOP Conference Series: Materials Science and Engineering
ABSTRACT Various criteria for processing of aluminum foil ''smart sensors'... more ABSTRACT Various criteria for processing of aluminum foil ''smart sensors'' images for fatigue evaluation of carbon fiber reinforced polymer (CFRP) were analyzed. There are informative parameters used to assess image quality and surface relief and accordingly to characterize the fatigue damage state of CFRP. The sensitivity of all criteria to distortion influences, particularly, to Gaussian noise, blurring and JPEG compression was investigated. The main purpose of the research is related to the search of informative parameters for fatigue evaluation, which are the least sensitive to different distortions.
2012 7th International Forum on Strategic Technology (IFOST), 2012
ABSTRACT UHMWPE (Ultra High Molecular Weight Polyethylene) is widely used in the medical applicat... more ABSTRACT UHMWPE (Ultra High Molecular Weight Polyethylene) is widely used in the medical application and is a promising structural material for application in mining, chemical, mechanical engineering. Having very low friction coefficient it might be used even instead of metal friction parts but it calls for further increase of its physical mechanical properties. It is one of the very high resistant materials but it is difficult to bond with other substances. One of perspective ways to bond UHMW-PE with filler is its grafting. There is one more interesting approach, when graft UHMWPE is added to UHMW-PE in order to react both with latter and nanofiller. This might be achieved be adding different kind of fillers, in particular nanoscale ones. In this paper we attempted to increase the mixture ability of UHMWE-graft-SMA with Cu, CNF and Al2O3 for enhancing its wear resistance properties and study the changing of hardness after mixing. We employed UHMWPE powder and graft UHMWPE with anhydride and carboxyl functional groups realized by modification of the polymers in reacting gases (UHMWPE-g-SMA). It was assumed that grafting will provide adhesion between UHMWPE particles. UHMWPE-g-SMA and UHMWPE were mixed using a high speed homogenizer in dry form. The mixture was pure UHMWPE with 0, 3, 5, 10 and 20 wt% of UHMWPE-g-SMA. This material is denoted as UHMWPE-g 0, 3, 5, 10, 20 respectively. And then add 0.5% CNF (Carbon Nano Fiber), 0.5% Cu (nanosize) and 0.5% Al2O3 (nanosize) to their mixture. The wear resistance of UHMWPE + UHMWPE-g-SMA specimens is increased when UHMWPE-g-SMA is mixed with UHMWPE powder and nanofillers. Cu, CNF and Al2O3 nano filler were added to UHMWPE the wear intensity is rather different from UHMWPE in initial state (pure) and give rise to increase wear resistance. The results of the wear tests have shown that the highest wear resistances of each group of fillers are UHMWPE-g 3 with 0.5% Cu, U- MWPE-g 3 with 0.5% CNF and UHMWPE-g 10 with 0.5% Al2O3. However, in contrast with this result, wear resistances is increased when UHMWPE-g-SMA and nanofillers were added. In case of hardness property, hardness does not change effectively.
Journal of Friction and Wear, 2014
Optoelectronics, Instrumentation and Data Processing, 2013
ABSTRACT The influence of adaptive bilateral filtration on the calculation of the fractal dimensi... more ABSTRACT 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.