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Tytuł:
The influence of auxilary supplements added in the extrusion process to reduce the friction of a polymeric foil
Autorzy:
Białasz, Sebastian
Powiązania:
https://bibliotekanauki.pl/articles/102872.pdf
Data publikacji:
2018
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
foil
friction
extrusion
Opis:
The publication describes research on supplements that reduce foil friction in the case of sliding contacts. The supplements added to the LD-PE polymer material were based on the following blends: erucic acid amide, behenic acid amide, colloidal silica, potassium soap and talc. The work contains information on the types of processing additives and the resulting changes in properties in the surface layer of the product in the form of foil.
Źródło:
Advances in Science and Technology. Research Journal; 2018, 12, 3; 250-256
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study of coatings obtained from alloy Fe-Mn-C-B-Si-Ni-Cr
Autorzy:
Pashechko, M.
Dziedzic, K.
Barszcz, M.
Powiązania:
https://bibliotekanauki.pl/articles/103061.pdf
Data publikacji:
2016
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
wear
friction
welding
Opis:
Tribological behaviour of coatings obtained from eutectic alloy Fe-Mn-C-B-Si-Ni-Cr was studied. The coatings were obtained by the method of gas metal arc welding (GMA) with use of powder wire. GMA welding method is widely used for the regeneration of machine parts. Eutectic Fe-Mn-C-B-Si-Ni-Cr alloys can be used to obtain high quality coatings resistant to wear and corrosion. Pin-on-disk dry sliding wear tests at sliding speeds 0.4 m/s and under load 10 MPa were conducted for pin specimens. During friction a typical tribological behavior was observed. The mechanism of wear was mechanical-chemical.
Źródło:
Advances in Science and Technology. Research Journal; 2016, 10, 31; 194-198
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Friction modeling of Al-Mg alloy sheets based on multiple regression analysis and neural networks
Autorzy:
Lemu, H. G.
Trzepieciński, T.
Kubit, A.
Fejkiel, R.
Powiązania:
https://bibliotekanauki.pl/articles/102791.pdf
Data publikacji:
2017
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
friction coefficient
friction
GRNN
neural networks
RBF network
sheet metal forming
Opis:
This article reports a proposed approach to a frictional resistance description in sheet metal forming processes that enables determination of the friction coefficient value under a wide range of friction conditions without performing time-consuming experiments. The motivation for this proposal is the fact that there exists a considerable amount of factors affect the friction coefficient value and as a result building analytical friction model for specified process conditions is practically impossible. In this proposed approach, a mathematical model of friction behaviour is created using multiple regression analysis and artificial neural networks. The regression analysis was performed using a subroutine in MATLAB programming code and STATISTICA Neural Networks was utilized to build an artificial neural networks model. The effect of different training strategies on the quality of neural networks was studied. As input variables for regression model and training of radial basis function networks, generalized regression neural networks and multilayer networks the results of strip drawing friction test were utilized. Four kinds of Al-Mg alloy sheets were used as a test material.
Źródło:
Advances in Science and Technology. Research Journal; 2017, 11, 1; 48-57
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wear tests of sliding surfaces in the environment of mixtures of lubricating oils and refrigerants
Autorzy:
Górny, K.
Tyczewski, P.
Zwierzycki, W.
Powiązania:
https://bibliotekanauki.pl/articles/101978.pdf
Data publikacji:
2014
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
refrigerant
refrigerating oil
friction coefficient
Opis:
Elements of refrigeration compressors may be exposed to various types of wear pro¬cesses, depending on the used oils and refrigerants. The presence of the refrigerant makes the lubricating properties and anti-oil mixture - factor much worse than in case of the lack of refrigerant oil. Current regulations on the use of ODS phase-out of working require refrigeration synthetic refrigerants HCFC (e.g. popular R22). The paper presents the effect of different mixtures of oils and refrigerants on friction coefficient and surface condition of cast iron and aluminium PA6. Tests were performed on a prototype machine using frictional node type block-on-ring, which is located inside a pressure chamber that simulates the refrigeration compressor. The results of the study confirm the possibility of using green refrigerant R290 (propane) as a substitute for R22, while keeping the existing mineral oil.
Źródło:
Advances in Science and Technology. Research Journal; 2014, 8, 21; 49-53
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The mechanism of friction between surfaces with regular micro grooves under boundary lubrication
Autorzy:
Pashechko, M.
Kindrachuk, M.
Radionenko, O.
Powiązania:
https://bibliotekanauki.pl/articles/102225.pdf
Data publikacji:
2016
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
friction
microrelief
surface
lubrication
micro-grooves
Opis:
The results of researches related to the influence of partially regular microrelief parameters on the adhesion component of the friction factor under boundary lubrication have been given. A special ring-on tape test rig is proposed in order to avoid errors during running-in process. Special technique is used to form sinusoidal microgrooves what helped to create a partially regular microrelief on the surface with controlled contour and nominal contact areas. Fatigue and deformation components of wear process are considered. We proved that microtexturing with proposed parameters decreases the adhesion component of friction and reduces the probability of microwelding. It has been shown that under boundary friction micro grooves are effective on precision surfaces with low roughness when lack of film and probability of seizure appear.
Źródło:
Advances in Science and Technology. Research Journal; 2016, 10, 32; 82-85
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research on tribological properties of dental composite materials
Autorzy:
Dziedzic, K.
Zubrzycka-Wróbel, J.
Józwik, J.
Barszcz, M.
Siwak, P.
Chałas, R.
Powiązania:
https://bibliotekanauki.pl/articles/103005.pdf
Data publikacji:
2016
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
dental materials
biotribology
friction coefficient
wear
Opis:
Dental practice today used a lot of different materials. This paper evaluates tribological and mechanical properties of two dental materials CeramX and I-Light. Tribological analysisad of samples was conducted at temperature 37°C and in the environment of artificial saliva. The wear rate was evaluated with a ball-on-disc tribotester, in accordance to ASTM G-133 norm. The counterbodies were 6-mm-in-diameter Al2 O3 steel balls. The load of 2, 10 and 20 N was applied. The tests were conducted at 0.15 m/s sliding velocity over a sliding stroke of 1000 m. The changes in the value of the following parameters were measured during the trials: friction coefficient, friction force, temperature and wear depth. After completing the tribological tests the surface of samples was carried out.
Źródło:
Advances in Science and Technology. Research Journal; 2016, 10, 32; 144-149
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Laboratory Device Detecting the Magnitude of the Static Friction Coefficient of Brake Lining
Autorzy:
Hrabovský, Leopold
Hrbáč, Roman
Powiązania:
https://bibliotekanauki.pl/articles/2023972.pdf
Data publikacji:
2021
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
friction coefficient
brake lining
dual-caliper drum brake
Opis:
The paper describes the design of laboratory equipment, which was created for verification and determination of the value of the static coefficient of friction in the contact surfaces of the brake lining and the brake drum of the drum brake with external shoes by experimental procedure. Suppliers of brake linings state values of the friction coefficients which correspond to different operating temperatures, but do not state the values of the friction coefficient of the respective brake lining with regard to the state of contamination of the contact surfaces. In practice, brake contact surfaces are exposed to moisture, dust, lubricants and oils, and these weather and operational influences significantly affect the value of the coefficient of friction. The results of laboratory tests performed with two types of brake linings (commonly used in practice) (fabric, hardened rubber) show that the coefficient of friction of a given brake lining is strongly influenced by the state of contamination of the contact surfaces.
Źródło:
Advances in Science and Technology. Research Journal; 2021, 15, 2; 191-197
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of Tribological Properties of Single- and Double-Layer Pad Coatings Deposited onto Cultivator Points
Autorzy:
Wójcik, Wiesław
Barszcz, Marcin
Dziedzic, Krzysztof
Kuzioła, Jarosław
Kowalik, Przemysław
Powiązania:
https://bibliotekanauki.pl/articles/958001.pdf
Data publikacji:
2019
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
wear
friction
coatings
welding
zużycie
tarcie
powłoki
spawanie
Opis:
This paper investigates properties of single- and double-layer pad coatings deposited on cultivator points. The coatings were deposited by manual metal arc welding (MMA) with ESAB OK. 84.58 coated electrodes using an inverter welder, DEDRA DESi201. Tribological properties were determined with a THT 1000 tribometer. A ball-on-disc friction pair was used. Experiments were performed in room temperature, with the sliding speed set equal to 0.3 m/s and two loads: 5 and 20 N. In addition, hardness was measured on the surface and in the cross section of samples by a Rockwell hardness test method (scale C). Surface roughness was measured before and after friction, and post-friction surface topography was examined under microscope. Impact strength tests of the coatings with single- and double layers of pads were performed. The tools and IT algorithms were used to collect and process the results of experimental research.
Źródło:
Advances in Science and Technology. Research Journal; 2019, 13, 3; 120-128
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rotary friction welding of weight heavy alloy with wrought AlMg3 alloy for subcaliber ammunition
Autorzy:
Goroch, O.
Gulbinowicz, Z.
Powiązania:
https://bibliotekanauki.pl/articles/101922.pdf
Data publikacji:
2017
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
friction welding
weight heavy alloy
sub-caliber ammunition
Opis:
The results of studies concerning friction welding of Weight Heavy Alloy (WHA) with AlMg3 alloy are presented. The friction welding of density 17.5 Mg/m3 with aluminum alloy showed that it is possible to reach the joints with the strength exceeding the yield strength of wrought AlMg3 alloy. This strength looks to be promising from point of view of condition which have to be fulfilled in case of armor subcaliber ammunition, where WHA rods play the role Kinetic Energy Penetrators and aluminum is used for projectile ballistic cup.
Źródło:
Advances in Science and Technology. Research Journal; 2017, 11, 4; 111-122
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of structure and shear/peel strength of refill friction stir spot welded 7075-t6 aluminium alloy joints
Autorzy:
Kluz, R.
Kubit, A.
Wydrzyński, D.
Powiązania:
https://bibliotekanauki.pl/articles/102597.pdf
Data publikacji:
2017
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
spot welding
friction stir welding
aluminium alloy joining
Opis:
The article presents an analysis of the macrostructure and mechanical properties of spot welds of joints made by Refill Friction Spot Stir Welding (RFSSW) method. RFSSW is a relatively new technology that is gaining wider use, not only in the automotive and aviation industries because it is a less energy intensive method than resistance spot welding. The primary focus of the article is the effect of welding time on the quality of the welded joints of sheet metal using the aforementioned method. The research was conducted on a joint between two pieces of sheet metal of various thicknesses (1.6 mm and 0.8 mm) made of a common aviation grade aluminium alloy 7075-T6 Alclad. Metallographic sections of select variants were made in order to analyze the structure of the joint. Strength tests with a static load were conducted in different loading configurations. A traditional tensile strength test was conducted on the lap joint, which revealed a complex stress state within the joint and an analogous test was conducted with the use of a stiffening holder that ensured a pure shear state in the joint. Peel tests were also performed on the lap joints with using a special holder.
Źródło:
Advances in Science and Technology. Research Journal; 2017, 11, 3; 297-303
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Comparative Study of Tribological Behavior of Moglice and DK-6(PT) Composites
Autorzy:
Pashechko, Mykhailo
Ishchenko, Аnatoliy
Radionenko, Aleksandr
Kindrachuk, Myroslav
Tisov, Oleksandr
Powiązania:
https://bibliotekanauki.pl/articles/2022309.pdf
Data publikacji:
2022
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
polymer matrix composites
friction coefficient
wear
tribometer
hardness
Opis:
Authors have produced new polymer-based composite material DK-6(PT) for substitution of Moglice (Diamant) polymer. We manufactured and used sliding-friction test apparatus (pin-on-disc) capable of testing three specimens simultaneously, much reducing time for the test. The monitoring of the material curing process and the Shore hardness test indicate minor difference from reference material. Measurements were carried out during the curing period, since it is important to know change in this parameter over time. The wear test proved that DK-6(PT) composite in the long-time test has good wear resistance: over 80 km of the friction path, the wear loss of both materials is approximately the same. Furthermore, the friction factor of DK-6(PT) is 5–10% less than that of Moglice. Thus, the studied new polymeric composite may compete with well-known material Moglice and significantly cut the expenses for reconditioning of worn slide ways of metal working equipment.
Źródło:
Advances in Science and Technology. Research Journal; 2022, 16, 1; 149-157
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Effect of Plunge Depth on the Strength Properties of Friction Welded Joints Using the RFSSW Method
Autorzy:
Kluz, Rafał
Kubit, Andrzej
Wydrzyński, Dawid
Powiązania:
https://bibliotekanauki.pl/articles/102342.pdf
Data publikacji:
2018
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
friction stir welding
joining aluminium alloys
refile friction spot stir welding
zgrzewanie tarciowe
łączenie stopów aluminium
spawanie punktowe z mieszaniem punktowym
Opis:
The Refill Friction Stir Spot Welding (RFSSW) method consists of three variable process parameters: rotational speed, tool plunge time and depth. The article presents an analysis of the effects tool plunge depth on shear strength. For this purpose, samples had a shearing load applied in a device prepare for this purpose. The shear strength was determined. An analysis of the results showed that tool plunge has a large effect on the strength of the joint and the structure of the joint. Depending on the tool plunge value, three types of joint failure were observed during the static shear strength test.
Źródło:
Advances in Science and Technology. Research Journal; 2018, 12, 1; 41-47
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Theoretical and experimental analysis of loading impact from the progressive gear on the lift braking distance with the use of the free fall method
Autorzy:
Lonkwic, P.
Różyło, P.
Powiązania:
https://bibliotekanauki.pl/articles/103063.pdf
Data publikacji:
2016
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
friction drive lift
progressive gears
safety
FEA analysis
Abaqus
Opis:
The gear which is the central safety element of the friction drive lift during braking is exposed to overloading connected with changeable weight which loads the lift braking system. In the article the results of numerical analysis for braking process of CHP 2000 type progressive gear distinguished by an innovative design have been presented. The numerical analysis was conducted with the use of a simulation of the gear roller displacement depending on changeable loading with the support of Abaqus/CAE software. Displacement of the gear roller from the neutral position in which the gear starts loosing energy of speeding up weight to zero was simulated. The results obtained from computer simulations were verified on the basis of a physical experiment at the bench station created to verify braking parameters of the gears with the use of free fall method.
Źródło:
Advances in Science and Technology. Research Journal; 2016, 10, 30; 103-109
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Selection of the Friction Model for Numerical Analyses of the Impact of Longitudinal Vibration on Stick-Slip Movement
Autorzy:
Rybkiewicz, Marta
Leus, Mariusz
Powiązania:
https://bibliotekanauki.pl/articles/2023309.pdf
Data publikacji:
2021
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
reduction of stick-slip
friction models
longitudinal tangential vibrations
Opis:
The purpose of the experimental and numerical tests presented in this paper was to indicate a friction model suitable for simulation analyses of the impact of longitudinal tangential vibrations on stick-slip movement in sliding motion. The vibration parallel to the shift direction are forced in the contact zone of a shifted body and the base. They can cause partial or total reduction of the stick-slip phenomenon or even reduce the value of necessary drive force. The time characteristics of drive force were determined experimentally and in simulation for two cases, i.e. at a motionless or vibrating base. Simulation analyses were carried out in accordance with the described computational procedures implemented in Matlab-Simulink environment. Four models of friction were tested in the presented studies: Dahl, Karnopp, Reset Integrator and LuGre. Experimental tests were carried out on a specially designed tests stand. The Root Mean Square Error (RMSE) was used to compare the results of numerical calculations with results of experimental tests. The performed qualitative assessment and the determined RMSE values indicated that the LuGre and the Reset Integrator models ensure he best consistency of model and experimental time characteristics of the driving force.
Źródło:
Advances in Science and Technology. Research Journal; 2021, 15, 3; 277-287
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Gradient composite coatings for working surfaces of braking devices
Autorzy:
Pashechko, Mykhaylo
Kindrachuk, Myroslav
Humeniuk, Ihor
Berezhanskyi, Taras
Powiązania:
https://bibliotekanauki.pl/articles/102670.pdf
Data publikacji:
2018
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
coating
eutectic
plasma
composite
friction
surface
powłoka
osocze
kompozyt
tarcie
powierzchnia
Opis:
In this paper a study to develop a composite wear-resistant coatings for application to the working surface of linings of brake devices, which is based on a rule of a positive gradient of mechanical properties was carried out. These devices and so coatings work in conditions of rapid rise of temperature. Thermal properties of matrix and inclusions should not differ a lot. Otherwise this will cause internal cracking and deterioration of coating. With this purpose we did the analyses of thermal properties of matrix and carbide particles of coating and concluded thet a material with balanced composition based on thermal properties will have the best wear resistance It was created and tested eutectic composites based on alloy steel 12X18H9T based on thermal characteristics of all components. Wear tests indicated the best wear resistance of coating with composition: steel 12X18H9T (matrix) – 75%; fillers TiB2 – 10%, VC – 15%.
Źródło:
Advances in Science and Technology. Research Journal; 2018, 12, 2; 1-5
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 30

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