Anna Rudawska

• Lublin University of Technology

Polymeric thin films based on polylactide with an addition of poly(ethylene glycol) as a plasticizer and flavonoids in the form of quercetin and berberine were subjected to tests that were particularly relevant from the point of view of contact with food. A comparative analysis of the effect of individual flavonoids on the antioxidative properties...

The influence of chromate, phosphate, glossy and brightening coatings on the performance of adhesive joints of hot-dip zinc-coated steel sheets was compared. The contribution of this study has been to compare the adhesive joint strength in adherends with two types of coatings: steel sheet with zinc coating and additional coating. Two types of bisph...

The aim of the article was to determine the strength of the adhesive joints of the carbon steel and aluminium alloy. Two types of two-component epoxy adhesives were used in the tests: rigid and flexible. Rigid epoxy adhesive contains epoxy resin based on Bisphenol A and triethylenetetramine (TETA) curing agent, in a ratio of 100 g resin to 10 g cur...

The aim of the study was to establish the influence of poly(ethylene glycol) (PEG) on the properties of potential biodegradable packaging materials with antibacterial properties, based on polylactide (PLA) and tea tree essential oil (TTO). The obtained polymeric films consisted of PLA, a natural biocide, and tea tree essential oil (5–20 wt. %) was...

The purpose of this study was to assess the effects of different aqueous environments (i.e., demineralised, distilled and spring water) on the mechanical properties of a cold-cured bisphenolic epoxy resin modified with the addition of calcium carbonate filler, typically employed as structural adhesive. The parameters selected for the analysis have...

In this study, the effect of cutting parameters on the quality of an Al/CFRP sandwich structure (aluminium alloy–carbon fibre reinforced polymer) after milling with uncoated and TiAlN-coated tools was examined. The results of the cutting force were also investigated. The research was conducted in a VMC 800 HS vertical machining centre with a variab...

A huge amount of waste comes into being from tyres which cannot already be used for their purpose. There are many ways how to utilize this waste but material recyclation is a priority. Waste tyre rubbers can be processed into a form of granulate which can be used into polymeric composite materials. This research deals with possibilities of tyre was...

The paper is focused on the research of the cyclic loading of hybrid adhesive bonds based on eggshell microparticles in polymer composite. The aim of the research was to characterize the behavior of hybrid adhesive bonds with composite adhesive layer in quasi-static tests. An epoxy resin was used as the matrix and microparticles of eggshells were u...

This paper aims to present the effect of specific operational factors (temperature and humidity) on the selected mechanical properties of a conveyor belt. The tests were conducted in a climatic chamber, simulating the effect of both minus and plus temperatures −30 °C to 80 °C (243 K to 353 K) at specific humidity, and in a thermal shock chamber whe...

The objective of this study is to compare the effect of selected operating factors on the mechanical properties of epoxy adhesive compounds aged in salt water. Five different water environments were tested: tap water, normal seawater (reference salinity value), seawater with double reference salinity value, seawater with half of the reference salin...

Hybrid sandwich structures are more and more widely used in many industries. This is mainly due to their good properties. One of the limitations regarding the use of sandwich structures is their difficult processing. Therefore, it seems reasonable to determine the influence of cutting parameters and machining configuration on the characteristic def...

The aim of the study was to compare the welded and adhesive joints made of polypropylene pipes. The pipes were butt jointed. Two pipe diameters were used: ø20 mm and ø25 mm. Welded joints were made by hot gas welding, while adhesive joints were made by two epoxy adhesive compositions. The base for both compositions was Epidian 6 epoxy resin, which...

This study investigated the effect of the different surface treatment methods on the strength of Ti6Al4V titanium alloy sheet adhesive joints. The following surface treatment methods were used: alkaline degreasing, anodizing, vibratory shot peening, and anodizing with vibrational shot peening. The following tests/measurements were carried out durin...

Abstract The aim of the present article is to compare the strength of the adhesive lap joints of the selected materials used in aviation. The joints were made in the similar and dissimilar systems with the use of three epoxy adhesives. Three different adherends were used: the EN AW-7075 aluminium alloy, the aramid-epoxy composite and the carbon-epo...

This paper examines the effect of a selected environmental ageing condition – specifically the temperature – on the strength of adhesive joints. The joint specimens were formed with EN AW 2024 aluminium alloy sheet adherends bonded with three types of epoxy resin compounds. A novelty in the research is the use of a combination of various types of e...

Adhesive bonding technology present a perspective method of various materials bonding and replacing conventional bonding e.g. welding. A geometric shape modification of bonding material and an adhesive reinforcing by glass fibres to increase tensile strength of adhesive bond was subject of this research. The bonding material was modified into prefo...

We present, for the first time, an original experimental study on the effect of ageing process (seasoned in the aqueous environment) on the mechanical behaviour of adhesive tubular butt joints. In order to manufacture adhesive tubular butt joints, tubes with a diameter of 20 ± 1 mm, made of three different materials (polypropylene, carbon steel and...

The objective of this study was to determine the effect of selected curing conditions on the mechanical properties of the cured adhesive compounds and adhesive joints made with these adhesives. Four different two-component epoxy adhesive compounds were investigated in the study. All of them were based on Epidian 53 epoxy resin and were prepared usi...

The influence of temperature on the fatigue properties of pseudoelastic NiTi under low-cycle fatigue are investigated. Tests were performed under the uniaxial tensile deformation (pull-pull) at 0�? and 20�? which is above the austenite finish temperature. Experimental results indicate that the fatigue life of NiTi alloy increases with the decrease...

The paper deals with an influence of a cyclic degradation process on changes of a shear tensile strength of single lap-shear adhesive bonds and their elongation according to ČSN EN ISO 9142. Five one-component structural adhesives used in a construction of car body works were used within the research. The degradation of adhesive bonds is a signific...

Weld lines, created in the areas of collision of two flow fronts of plastic in the injection mold cavity, are the reason of lower mechanical properties and a worse surface condition of molded parts. In the weld line area, the V‐shaped notch is formed and its shape and size depend on injection molding conditions and properties of processed polymer....

The aim of this study was to analyse the impact of the adhesive samples seasoning conditions (temperature and time) on selected mechanical properties of four epoxy adhesive compounds (two unmodified and two modified ones). The samples were made of Epidian 53 epoxy resin mixed with the two different amine curing agents in appropriate stoichiometric...

This paper reports the results of research on selected properties of adhesive compositions containing two types of epoxy resin: Epidian 5 and Epidian 6, and two types of polyaminoamide curing agents. The resins and curing agents were mixed in different stoichiometric ratios. This led to the production of 20 adhesive compositions which were thensubj...

This paper discusses the issues concerning the strength of PE–HD 500 polyethylene adhesive joints depending on the applied variable structural and technological factors. The variable structural factor was joint geometry: the samples were single-lap joints and butt adhesive joints. As far as the technological factors are concerned, two types of cyan...

Adhesive bonding is currently one of the most popular techniques of joining different materials. It is worth noting that this process is more and more often used in several industries: automotive, transport, mechanical engineering, medicine, electronics, light industry, as well as many others. The present article is aimed at determining an impact o...

Production is the most important and major activity of a production system. It may relate to goods used in various industries, as well as in agriculture or horticulture. The aim of this article is to analyse a selected production process and to propose several technical and organisational changes within the process of producing cucumbers in greenho...

Implementation of modern handling facilities contributes to the quality performance of each business subject. Nowadays, mechanization and automation of processes associated with the handling of shipments finds an important place especially in the conditions of the postal and logistics sector, which is growing due to ecom-merce. The method of alloca...

The aim of this study is to determine the effect of cataphoretic and powder coatings and also the method of application the primer on the adherends surface on the strength and failure modes of EN AW-5754 aluminium alloy adhesive joints. The study is performed on lap joints made of EN AW-5754 aluminium alloy, subjected to three different types of su...

Celem opracowania jest przybliżenie zagadnień związanych z wybranymi zagadnieniami logistyki w jednostkach gospodarczych, w tym m.in.: zagadnień związanych z systemami informacyjnymi w przedsiębiorstwie, zasadami gospodarki opakowaniami, regulacjami prawnymi dotyczącymi przepływu, przechowania i ochrony informacji, a także zasadami sporządzania dok...

Celem opracowania jest przybliżenie zagadnień związanych z wybranymi zagadnieniami logistyki w jednostkach administracyjnych, w tym m.in.: zagadnień związanych z istotą, celami i zasadami funkcjonowania jednostek administracyjnych, regulacjami prawnymi dotyczącymi przepływu, przechowania i ochrony informacji i dokumentów, a także logi-stycznych asp...

This paper examines the effect of selected factors on the wood bonded joint strength. The structural factor under scrutiny was the geometry of the surface area; however, other major dimensions of adherends were compared as well. The tests were performed on 6 joint types: butt, v-shaped, interlocking, scarf, tongue & groove, and single lap joints, w...

On the market there are plenty of machines for cutting of steel via a mixture of oxygen and flammable gases. Various manufacturers provide several types of torches, cutting nozzles and other equipment in their product range. Cutting nozzles are a component that significantly affects quality of cutting based in set parameters. However, data from cat...

In the paper are presented the results of research on the use of cavitation effects in certain technologies. Intensification of mass transfer processes in the system 'solid phase - liquid' is reviewed taking into account solid phase cavitation crashing, turbulization of boundary diffusion layer of fluid by cavitation bubbles, the emergence of non-s...

The aim of this paper is to determine the effect of arrangement of fibreglass fabric plies in a polymer composite on a strength. Based on the experimental results, the real effect of plies arrangement and their most favourable configuration with respect to strength is determined. The experiments were performed on 4 types of handmade composites whic...

Among the great number of methods for measuring the surface free energy of solids, all originate in contact angle measurements, which are carried out using various probe liquids, and employ certain relationships and assumptions. Contact angle measurement can be distorted by a number of factors that occur during the measurement and distort obtained...

The main purpose of this paper was to determine the effect of biochemical modification of epoxy adhesive compounds on the mechanical properties of hot-dip galvanized steel sheet DX51+Z275 adhesive joints. The epoxy adhesives (resin and curing agent) were biochemically modified by lyophilized fungal metabolites (in the form of lyophilized fungal fra...

The present paper evaluates the effect of joining method on the strength of joint assemblies of selected structural materials: DX51+Z275 galvanised steel, OH18N9 stainless steel and DC01 low carbon steel. The objects of the study are: the lap adhesive joint and the butt welded joint with continuous and spot weld. Welded joints were produced latter...

The aim of the research was to investigate a possibility to use active rubber powder (ARP) from a process of tyres recyclation in an area of a filler into a reactoplastics matrix applied in structural adhesive bonds. This study focuses on an analysis of a tensile strength, a shear impact strength and a hardness of the composite mixture itself and f...

The technical diagnostics as essential part of machine tool maintenance provides information about condition of examined machine tool but it requires not only special equipment but also certain level of skill of operators in order to achieve optimal performance. The article is aimed at the set of methods and tools capable of providing realistic sim...

The article presents the results of research on the influence of one of the technological factors, which is preparation of C45 steel surface before bonding. Seven methods of surface preparation performed by mechanical abrasive grinding tools of different gradations: P40, P120, P320 and P500 in various combinations one-stage or multi stage and degre...

The objective of this study is to compare the strength of riveted joints fabricated by traditional riveting (with pre-drilled holes) and self-piercing riveting (SPR) for different types of joints. Riveted joints were produced using steel and aluminum alloy rivets and two types of sheet material: 235JR steel sheet and EN AW 6060 aluminum alloy sheet...

W artykule zaprezentowano wyniki badań właściwości mechanicznych wybranych klejów epoksydowych. W trakcie badań wykorzystano 6 kompozycji klejowych przygotowanych z 3 rodzajów żywic epoksydowych: Epidian 5, Epidian 53 oraz Epidian 57, które mieszano z utwardzaczem PAC w stosunku 100:100 oraz 100:80. Podczas realizacji badań przygotowano 2 zestawy p...

The article presents the selected results of strength tests on the effectiveness of bonding high-alloy steel 1.4310. Sheet steel is one of the materials that are difficult to activate energy. Effective joining of it is difficult, requires selection of the appropriate bonding technology. The paper focuses on the comparative tests the shear strength...

The paper investigates the compression strength of samples of regenerative polymer mass RM 101 Resimetal Metal Repair Pasta manufactured by Rendor. The effect of weather conditions on selected mechanical properties of the tested mass is examined. The samples are subjected to seasoning at room temperature, in an environmental chamber, and in a therm...

The paper presents selected aspects of the effect of primers on adhesive properties and strength of aluminium sheet adhesive joints, made using polyurethane adhesives. The strength of adhesive joints was determined based on two cure time variants: 15 and 64 h. It was found that the longer cure time at a humidity of 33% is more desired, as it leads...

The adhesive properties of ternary composites based on middle density polyethylene (PE-MD) and isotactic polypropylene (i-PP) with high content (48-64 wt %) of inorganic fillers were studied. As fillers two kinds of calcium carbonate were used. Two fillers differed in their fineness degree and one of them had also stearic acid modified surface. It...

The following paper analyses selected problems regarding the impact of technological parameters and type of adherend material on the strength of adhesive-bonded steel sheet joints. The subject of the test was a single-lap adhesive joint of S235JR steel sheet. Joints were formed on two types of substrates: with or without corrosion products on the s...

The aim of this paper is to determine the effect of arrangement of fibreglass fabric plies in a polymer composite on adhesive joint strength. Based on the experimental results, the real effect of plies arrangement and their most favourable configuration with respect to strength is determined. The experiments were performed on 3 types of composites...

The article presents the results of experimental research of the adhesive joints strength of graphite/epoxy composites and the results of the surface free energy of the composite surfaces. Two types of graphite/epoxy composites with different thickness were tested which are used to aircraft structure. The single-lap adhesive joints of epoxy composi...

The paper investigates the effect of degreasing, a surface preparation methods in adhesive bonding, on adhesive joint strength. 5 types of degreasing agents were used in the study: acetone, extraction naphtha, Ultramyt, Wiko and Loctite 7061. The degreasing operation was performed by three methods: rubbing, spraying and immersion. Strength tests we...

The paper deals with the utilization of a biological reinforcement in an area of an adhesive layer. An advantage of the biological reinforcement application is a simplification of following recyclation of adhesive bonds comparing to those with carbon and glass fibre based reinforcements. Biocomposites combining the biological reinforcement with an...

The article deals with application of geometric features and algorithms for optimization of manufacturing processes. Algorithms allow to create strategies based on a properties of geometric features. These strategies can be used to remove repetitive tasks and shorting of time for creation a machining process. Article describes the use of a Feature...

In production, treatment or operation of selected components it is not possible to avoid dirtiness. Given the fact that impurities significantly affect the quality, functionality and service life of a part, the surface preparation of such an element is a key aspect in the regeneration process. The choice of contaminant removal method will depend on...

The main objective of this study was to determine the effect of biochemical modification of epoxy adhesive compounds on the mechanical properties of a cured adhesive exposed to various climatic factors. The epoxy adhesive was modified by lyophilized fungal metabolites and prepared by three methods. Additionally, the adhesive compound specimens were...

The article is focussed on comparing and determining the impact of the cutting geometry of the cutting tool due to dynamic load on system and microgeometry machined surface. For longitudinal turning nickel alloy Alloy 625 (W. Nr. 2.4856) rounded indexable cutting insert was used (RCMT 10T3M0 – F2) and its equivalent squared indexable cutting insert...

This article presents selected criteria for the quality assessment of single-lap adhesive joints formed on 0.66±0.04 thick hot dip zinc coated sheets with the hot dip zinc coating thickness equal to 18 µm. Three types of epoxy adhesives and three variants of the mass of adhesives were tested (1 g, 2 g and 3 g). The work intended to assess the capac...

The paper presents the effect of sandblasting on surface properties of steel for adhesion. The investigated parameters included pressure (1, 2 and 4 bars) and four types of abrasive material, each material type being of different granulation. In the experiments the effect of the above variables on the surface roughness, contact angle Θ, work of adh...

The paper analyses the impact of mechanical milling pre-treatment parameters on adhesive joint strength. Comparison of surface roughness of adherends after milling and its effect on adhesive joint strength is analysed in strength tests. The tests were performed on C45 structural steel specimens, which were subjected to machining at different parame...

Due to customer driven economies, today’s world markets are characterized by high fluctuations in market demand and frequent arrival of new technologies and new products. To stay competitive in such markets manufacturing companies require continuous improvements both in technical and organizational areas of their activity. The paper presents result...

The idea and purpose of this article reside in addressing the postal system model by decomposing into independent subsystems in the form of displaying through a layered network model. Postal service is generally seen as a sequence of processes for collecting and distributing shipments for the purpose of their delivery. This service can also be defi...

This work features the results of experimental research in determining the limiting length of the bonded single-lap joint of materials of the same thickness, different thicknesses and of hybrid systems of different aluminium alloy sheets. The length of the bonded lap joint is just one of the structural features, critical to the strength of bonded j...

The paper presents selected aspects of modelling bonded joints of polymer composite materials by finite element method. The shear-loaded adhesive lap joints made of epoxy-graphite and epoxy-glass composite materials were investigated. The research objective was to determine correct modelling of adhesive layers using cohesive elements and of bonded...

This paper is primarily devoted to one of adhesive curing process parameters – pressure applied during curing, as well as the type of adhesive. The aim of this work is to determine the influence of pressure applied during curing process of aluminium alloy sheet adhesive joints on the strength of adhesive joints formed with two epoxy adhesives: Loct...

The paper presents the problems of preventing screw joints from self-loosening on one of helicopter. The research examines selected locking methods used in aircraft produced by different manufacturers. Experimental tests were performed to investigate the loosening torque of screw joints locked by various devices: cotter pin, locknut, centre punchin...

The following paper presents mechanical strength test results of a 160 x 9 mm PVC-U pipe, in the service of Municipal Water and Sewage Company since 1976, and the impact of the pipe material on the quality of water in contact. The water quality was evaluated in terms of the leaching of certain chemical elements from the pipe material to the water....

The study presents selected problems of the effect of mechanical treatment on surface roughness and adhesive properties as well as adhesive joint strength of steel sheets. In the experiments, the following treatments were applied: grinding, lapping and superfinishing, with variations of some technological machining parameters being taken into accou...

The aim of the work is the analysis of the organization of production, and door-producing undertaking to propose technical solutions that could improve production efficiency and reduce costs. On the basis of an analysis of the existing organizational and technical production plant a proposal of changes was presented. These changes depend on replaci...

The paper focuses on selected parameters of curing process – temperature and time. The tests aimed at evaluating the impact of short-term thermal recuring on 1050A and 2017A aluminium alloy sheet adhesive joints strength. Joints were formed with two different adhesives, the main component of which was in both cases epoxy resin Epidian 53 and two di...

In recent years, a number of patents have been devoted to the development of anodising of aluminium and aluminium alloys as well as chromium-free conversion coating. These include a patent regarding the use of a procedure for anodising aluminium alloys used in the aerospace industry, as well as the chromium-free conversion coating prepared by addit...

Adhesion is a surface phenomenon occurring in many processes, e.g., bonding, painting or varnishing. Knowing the adhesion properties is critical for evaluating the usability or behaviour of materials during these processes. Good adhesion properties favour the processes of bonding, resulting in high strength of adhesive joints. Adhesive bonded joint...

The paper presents issues concerning aluminium sheets adhesive joints strength. The aim of the work was to determine the strength of analysed joints basing on experimental tests, as well as on finite elements numerical analysis (FEA), of high importance to operating properties of the construction. The type of adhesive joint tested was a single-lap...

The influence of the introduction by extrusion of aluminum trihydroxide (ATH) and other auxiliary media into low-density polyethylene (PE-LD) on the surface free energy and the roughness of the composite surface has been determined. The results confirm that the introduction of ATH did not have any significant influence on the adhesive properties of...

This article presents the results of the testing of adhesive joint strength of hybrid assemblies consisting of different materials and joints of the same materials. Both experimental testing and numerical FEM analysis of the joints were applied. This type of joint can be found in the aviation industry, for example, where the use of composites as co...

This article presents the analysis for determining surface free energy uncertainty by the Owens–Wendt method (also known as the Kaelble–Owens–Wendt method). There are a lot of factors which have a substantial influence on the correctness of the contact angle measuring process. If a full measurement result is to be obtained, assessment of the result...

Epitaxial growth of thin layers from the liquid phase can occur with the use of solutions saturated under different ambient gases. Most often this process takes place in a vacuum or gaseous atmosphere of hydrogen or argon. As the experimental data show, the morphology of crystallized layers is determined by the ambient type in which the process occ...

Polymeric composites have been characterized as constructional materials. The significance of surface free energy and geometric structure of the surface was emphasized. Three types of epoxy composites differing in reinforcing fillers (glass, aramid or graphite ones) (Table 1) were subjects of investigations. Surface free energy (γs) of the composit...

The effects of the type and content of wooden filler on surface free energy (γS) and its components (polar γsP and dispersive (γSD ones) of polymer/wood composites (WPC), based on poly(vinyl chloride) or polypropylene, were investigated. It was found that the addition of wooden filler causes increase in γS and γSD values of PVC based composites. In...

Protective properties of zinc coating increase with an additional coating such as: chromate, phosphate, paint and polymer coating. Besides, additional treatment of zinc coating serves decorative purposes as well. The paper presents the influence of additional coating of zinc coating on their adhesive properties which are especially helpful in proce...