The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The article presents the results of studies on the formation of residual stresses due to finish burnishing. Improper state of stresses may arise when, seeking higher dimension and shape accuracy, smaller roughness, or improved plateau area, the production engineer is willing to apply high and very high burnishing forces Fb. Plastic deformations in roughness created by burnishing can be easily measured...
The objective of the paper is to calculate fatigue life with the use of the spectral method for 10HNAP steel under non-Gaussian loading conditions with the use energy parameter and non-Gaussian correction. The energy parameter has not yet been used in the frequency domain for fatigue calculations under non-Gaussian loading conditions. Some calculations regarding the energy parameter and spectral method...
The article presents the effects caused by the variation of fuel-oxygen mass content and widely differing chemical and physical properties of a fossil diesel (DF) and hydrotreated renewable diesel (HRD) fuel blends involving ethanol (E) or biodiesel (B) on ignition delay, combustion phenomenon, heat release characteristics, and maximum in-cylinder pressure of a turbocharged CRDI diesel engine. The...
The article presents an overview of known and used measurement methods on the basis of which the geometrical state of the design and bearing support of extra-large crankshafts is evaluated. These methods were evaluated both in terms of the correctness of their implementation and the interpretation of results. The article also presents a new concept of a device that permits the evaluation of the condition...
The authors proposed the concept of the synthesis of the algorithm for the electronic diesel controller (EDC), based on the analogy with the operation of a mechanical spring-lever governor of direct action. The system of automatic positioning using HEINZMANN StG 6-02V actuator is developed and practically implemented. A preliminary tuning of the electronic PID controller was performed, which ensured...
This article presents the possibilities for using cluster analysis in the assignment of machine tools in automated manufacturing systems. Based on the similarity of manufacturing processes in the system, cutting tools have been grouped. The objective was to obtain groups of similar objects, which could potentially ensure the reduction of the frequency and time of setups, optimizing the maintenance...
The implementation of carbon dots in electronic devices are among the hot topics in today’s research. The current work describes the fabrication of a new back contact electrode for solar cells with the modification of carbon paper by the uniform deposition of highly crystalline carbon dots (CD). The ~5nm size CD were synthesized by the sonication of polyethylene glycol (PEG-400), which was further...
A numerical solution of mathematical equations for the carrier gas and powder flow and numerical variables were used for establishing the effect of carrier gas pressure at the nozzles on the change of the thermodynamic flow of gas parameters of gas/powder mixture and pure gas in the nozzles at different operation modes. The calculations were based on the author’s computer program worked out from a...
The paper describes the results of investigations on shrink-fitted joints. Models of the marine engine cranks and pivots were made in the scale of 1:5 considering real conditions of the large-sized crankshafts fabrication. The results of ultrasonic measurements of stresses were compared to the temperature distribution during the cooling process of the assembled couplings. The conclusion was that the...
The present paper examines selected strength test results of adhesive joints of 316L steel after different types of surface treatment. The analysis focuses on the effect of surface layer treatment on the value of selected 2D and 3D surface roughness parameters with regards to adhesive joint strength. In addition, the Abbott-Firestone curve (bearing area curve) is examined in order to provide information...
The application of innovations is acknowledged as a driver for economic and social development. However, the processes of technology development and transfer are affected by numerous barriers, which are understood as any kind of limitations that hamper the effective functioning of a system of the generation, execution, and transfer of innovative technologies, and, as a result, block co-operation between...
In this paper authors present result of the experimental research and numerical calculations of the exploitation parameters of transverse slider bearings, lubricated with the used oil of non-Newtonian properties. The results of the experimental research are based on rheological examinations of the used oil in its exploitation time. These results leaded to the preparation of the dependence models of...
Thermoplastic olefins (TPO’s) are important materials for the manufacture of exterior and interior automotive components due to their low cost, reduced specific density in comparison with other types of plastics, easy processing, and 100% recyclability. Nano-composites with TPO matrix additionally offer significant gains in strength and impact resistance due to excellent interfacial reinforcement...
This article examines the skeleton structure of a product from porous permeable material based on a wire coil. The product consists of a round, porous, thin-walled tube. Two variants of tube load are considered, i.e. those involving internal and external pressures of a working fluid. Mechanical properties of the material have been analyzed. It has been found that the strength and stiffness of the...
Marking products manufactured from steel and non-ferrous metals is a very important part of the process. Generally, they are used in the production of parts responsible for the health and safety of people in the airline, automotive, and machine industries. The tessellated code is usually applied on the surfaces by laser techniques in the initial phase of the process. A shaping method of the surface...
The article presents the results of work on the verification of the technological capabilities of the EB-Dual BEAM device in the field of complex coatings, including gradient coating Ti↑-Zr↓, multi-pattern coating Ti-Zr, and multi-layer coating Ti/Ti-Zr/Zr. The obtained coatings were subjected to an analysis of changes in the chemical composition by the EDS method as a function of distance from the...
The article shows the complexity of a marine object generating the necessity of multi-criteria optimization. Due to a great number of criteria and complexity of structure, the design process was classified as hierarchic with a descending structure. A spatial design spiral has been suggested, through developing a two-dimensional Evans’ spiral. Specifics of preliminary design have been discussed. A...
In the paper, the permeability of polymer nanofiltration membranes was analysed. The studies were carried out for the model wastewater chromium (III) solutions at pH 4. The model wastewater chromium (III) solutions were included different concentrations of NaCl, Na2SO4, and CrCl3 . It was found that on the membrane permeability is influenced by their morphology and electrostatic properties, regardless...
Few researchers recognize the differences between complexity and complicatedness. Recent research indicates that complexity is an inherent property of the system, and is not a negative attribute. Complicatedness is a design property that can be reduced starting at the design stage. Design solutions for complex systems can be complicated or simple. This study explores the current definitions of complexity...
The article considers the results of theoretical and experimental studies devoted to the creation of an electronic control system of fuel injection in diesel engines. The method of synthesis of the algorithm for all-speed electronic governor is described. The functional scheme used for the fuel delivery system control based on the microcontroller, the HEINZMANN electric servo actuator, and the BOSCH...
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.