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1

Analysis of the strength of assembly joints - welded joints of various construction materials

Rudawska Anna, Penkała Piotr, Chochowski Paweł, Tkaczyk Andrzej, Vitenko Tetiana

Technologia i Automatyzacja Montażu

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2023

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nr 3

21--26

EN

The aim of the article was to present issues related to the strength analysis of one of the types of assembly joints - welded joints, taking into account the influence of selected factors: technological - welding method, construction - type of joints and material - type of joined material. The following welding methods were used (in accordance with the PN-EN ISO 4063 standard): arc welding in the shield of inert/active gases MIG/MAG (131/135), manual metal arc welding with a coated electrode MMA (111) and gas welding (oxyacetylene welding) (311).Butt joints and lap joints were made of CuZn37 copper alloy (PN-EN 1652), S235JR unalloyed structural steel (EN 10025) and 1.4301 acid-resistant steel (EN 10088). Welded joints samples were made with appropriate parameters, according to the welding methods. Strength tests of welded joints on MTS BIONIX 370.02 testing machine, in accordance with the PN-EN 1465 standard were provided. Based on the obtained test results, it can be seen that the value of stresses is affected by both the welding method and the type of joint structure, while the type of material to be welded should also be taken into account.

PL

Celem artykułu było przedstawienie zagadnień związanych z analizą wytrzymałościową jednych z rodzajów połączeń montażowych - połączeń spawanych z uwzględnieniem wpływu wybranych czynników: technologicznych - metody spawania, konstrukcyjnych - rodzaju połączenia oraz materiałowych - rodzaju łączonego materiału. Zastosowano następujące metody spawania (zgodnie z normą PN-EN ISO 4063): spawanie łukowe elektrodą metalową w osłonie gazów obojętnych/aktywnych MIG/MAG (131/1355), spawanie łukowe elektrodą otuloną MMA (111) oraz spawanie gazowe acetylenowo-tlenowe (311). Wykonano połączenia doczołowe i zakładkowe stopu miedzi CuZn37 (PN-EN 1652) oraz stal niestopowa konstrukcyjna S235JR (EN 10025) oraz stal kwasoodporna 1.4301 (EN 10088). Próbki spawane wykonano przy odpowiednich parametrach, stosownie do metody spawania. Badania wytrzymałościowe połączeń spawanych przeprowadzono na maszynie wytrzymałościowej MTS BIONIX 370.02, zgodnie z normą PN-EN 1465. Na podstawie uzyskanych wyników badań można zauważyć, że na wartość naprężeń ma wpływ zarówno metoda spawania, jak i rodzaj konstrukcji połączenia, przy czym należy uwzględnić także rodzaj spawanego materiału.

2

Characteristics of sewage sludge composition for agricultural use

Vitenko Tetiana, Marynenko Nataliia, Kramar Iryna

Economics and Environment

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2023

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No. 2

296--307

EN

The article focuses on the research conducted on sewage sludge in Ternopil City, Ukraine, with a specific emphasis on its microelement composition and implications for disposal and utilisation. Bacterial contamination in both old and new sludge storage facilities is revealed by the study. It is found that the sludge holds potential as a fertiliser due to its nutrient content and organic matter, although adjustments may be necessary for specific soil conditions. However, it is determined that the permissible limits for agricultural use are exceeded by heavy metal concentrations, indicating pollution resulting from landfills, old pipes, and intensive agriculture. According to existing regulations, the sludge is considered suitable only for composting. The importance of sludge monitoring, treatment, and management is underscored by the findings, as they are crucial for ensuring safe disposal, mitigating environmental risks, and addressing potential health hazards.

PL

Artykuł koncentruje się na badaniach przeprowadzonych na osadach ściekowych w Tarnopolu na Ukrainie, ze szczególnym naciskiem na ich skład mikroelementowy oraz implikacje dla ich usuwania i wykorzystania. Badanie ujawniło zanieczyszczenie bakteryjne zarówno w starych, jak i nowych obiektach składowania osadów ściekowych. Stwierdzono, że osad ma potencjał jako nawóz ze względu na zawartość składników odżywczych i materii organicznej, chociaż może być konieczne dostosowanie do określonych warunków glebowych. Ustalono jednak, że dopuszczalne limity dla zastosowań rolniczych są przekraczane przez stężenia metali ciężkich, co wskazuje na zanieczyszczenie wynikające ze składowisk odpadów, starych rur i intensywnego rolnictwa. Zgodnie z obowiązującymi przepisami osad jest uważany za odpowiedni tylko do kompostowania. Wyniki badań podkreślają znaczenie monitorowania, przetwarzania i zarządzania osadami ściekowymi, ponieważ mają one kluczowe znaczenie dla zapewnienia bezpiecznej utylizacji, łagodzenia zagrożeń dla środowiska i przeciwdziałania potencjalnym zagrożeniom dla zdrowia.

3

Study of thermal stability and energy of activation of epoxy composites with particles of synthesised powder mixture for increasing reliability of vehicles

Komsta Henryk, Vitenko Tetiana, Buketov Аndrii, Syzonenko Оlha, Bezbakh Оleh, Torpakov Andrii, Kruglyj Dmytro, Appazov Eduard, Popovych Pavlo, Rybicka Iwona

Zeszyty Naukowe. Transport / Politechnika Śląska

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2021

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z. 110

73--86

EN

The prospective of the application of new materials on a polymer base is shown in this work. Given that developed composites can be efficiently used for protection of equipment that is operated at elevated temperatures, the impact of the nature and content of powder mixture, synthesised by high voltage electric discharge, on the thermophysical properties of epoxy composites were studied. Epoxy diane oligomer was chosen as the main component of the binder during the formation of the composites. Polyethylene polyamine hardener was used for cross-linking of epoxy composites, which allows hardening of materials at room temperatures. The selection of powder mixture, synthesised by high voltage electric discharge, for increase of thermophysical properties of developed materials was justified. More so, thermal stability and activation energy of epoxy composites were studied. Permissible limits of the temperature, at which developed materials can be used, were established based on the conducted tests of thermophysical properties of materials, filled by powder mixture, synthesised by high voltage electric discharge.

4

Non-contact method of estimation of stress-strain state of underground pipelines during transportation of oil and gas

Droździel Paweł, Vitenko Tetiana, Zhovtulia Liubomyr, Yavorskyi Andrii

Zeszyty Naukowe. Transport / Politechnika Śląska

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2020

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z. 109

17--32

EN

Development and implementation of contactless methods for determining the stress-strain state of pipelines in the process of transportation of energy hydrocarbons is important for ensuring its safe operation. The authors developed a method for determining the change in the stress-strain state of the underground part of the main oil and gas pipelines according to the data about the displacement of a certain set of points of the axis of the pipeline. This study was conducted on a linear section of the main gas pipeline, where a landslide in 2010 created a force pressure on the pipeline, resulting in a pipeline rupture.

5

The Substantiation of the Optimal Parameters for Dough Pinning-Out Rollers

Vitenko Tetiana, Stadnik Igor, Droździel Paweł, Rudawska Anna

Advances in Science and Technology. Research Journal

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2020

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Vol. 14, no 1

32--41

EN

The article defines the rather complex and unpredictable movement of the dough in the gap between the working rolls and suggests the calculation for the optimal parameters for the rolls shape (particularly the parameters and their effect on the dough). The functional dependences of the permissible diameter and the gap between rotating rollers were substantiated. The block diagram of the geometric bounding parameters of the gradient field of the viscous fluid flow was proposed and the equation on the basic constructive parameters (h, r) affecting the pouring process efficiency was presented. The analysis of the experimental results revealed that the main features of the machine provide the necessary stable shape products and good rheological parameters of these products. The rheological testing indicators allow for a rational approach to the decision to operate a rolling process. At the same time, they improve the quality control methods and have an influence on the design parameters of rollers and modes of chambers. The proposed method not only allows obtaining a predetermined pressure, but also enables defining the optimal shape of the gap, wherein the pressure gradient is constant.

6

The Strength of the Adhesive Joints of the Medium-Density Fireboards and Particle Boards with the PVC Film

Rudawska Anna, Stančeková Dana, Müller Mirosław, Vitenko Tetiana, Iasnii Vlodymyr

Advances in Science and Technology. Research Journal

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2020

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Vol. 14, no 1

58--68

EN

The aim of the present article was to analyse the adhesive joints of different types of the furniture boards used for the furniture production. The present article included a comparative analysis of the adhesive joints of the particle board and the medium-density fireboard (MDF) pressed with the following types of film: A 0.3 mm thick PVC film and a 0.8 mm thick acrylic film, made with use of a single-component reactive hot-melt adhesive based on the PUR 706.2 ME polyurethane. It was observed that, among others, the adhesive joints made of the particle board with a pressed 0.3 mm thick PVC film and the adhesive’s basis weight of 24 g/m2 is characterised by better strength properties than the adhesive joints of the particle board with the adhesive’s basis weight of 48 g/m2.